Faculty Research and Publications

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Softball and the female community: Pauline Perron, pro ball player, Outsider, 1926-1951
(LA84 Foundation, 2006) Adams, Carly
In twentieth-century Canadian society, sport, leisure, and physical activities have been significant social venues where men and women learn to relate to one another, struggle for authority and power, and celebrate lifestyle and community values. However, the experiences of men and women in sport have been appreciably different, in terms of access to rewards, opportunities to participate, and the cultural norms associated with physical activity.In this sense, sport has reproduced a gender order through which men and women learn, appreciate, celebrate, and denigrate specific masculinities and femininities. The story of Pauline Perron and her personal reminiscences of growing up and playing sport in Quebec and later her recruitment by the London Supremes fastball club in Ontario offer a historically specific case study of one woman’s journeys between sport, work, and social life. When Perron joined the organized women’s softball community in the early 1940s, she found herself amidst an ongoing controversy over amateur values during the era of professional softball opportunities for women.
Change and grassroots movement: re-conceptualizing women's hockey governance in Canada
(Interscience, 2007) Adams, Carly; Stevens, Julie
In Canada, female hockey governance structures vary as different regions of the country may better suit integrated or partially-integrated governance approaches based upon their unique local histories and individual dynamics. Indeed, the Ontario Women’s Hockey Association (OWHA) is the only female hockey provincial association in Canada that endorses and endeavours to maintain a separatist philosophy. However, women’s hockey governance in Canada as a whole has not progressed in a manner where the authority of female hockey participants and leaders has increased. This paper initiates dialogue about women’s sport governance by utilising women’s hockey in Canada and specifically a case study of the OWHA, as a context in which to develop a new perspective and renew efforts to place women’s sport governance on the agenda. In order to develop a sport and governance dialogue for women’s hockey specifically and women’s sport more broadly, we present a theoretical discussion that integrates critical feminist and grassroots movement perspectives.
Race comedy and the "misembodied" voice
(York University, 2009) Brayton, Sean
This essay unpacks the ways in which our “knowledge” of race and ethnicity is tied to ocularcentrism. It explores the political possibilities of ethnolinguistic imitation or “style-shifting” as part of an antiracist pedagogy embedded within popular culture. If identity is performed across different contexts, we may find an interesting dialogue of race and ethnicity within stand-up comedy, a realm of popular culture sometimes dismissed as “light entertainment.” The comedy of Russell Peters and Margaret Cho offer a site of imitation and ambivalence enabled by delinquent ethnic voices that play with the boundaries between self and Other.
Obstacle crossing among people with Parkinson disease is influenced by concurrent music
(U.S. Department of Veteran's Affairs, 2010) Brown, Lesley; de Bruin Nutley, Natalie; Doan, Jon B.; Suchowersky, Oksana; Hu, Bin
Multitasking situations exacerbate gait impairments and increase the risk of falling among people with Parkinson disease (PD). This study compared obstacle negotiation among 10 subjects with PD and 10 nonparkinsonian control (CTRL) subjects in two test conditions differentiated by the presence of music played through a personal music player. Subjects walked the length of a 10 m walkway at a self-selected pace, crossing a 0.15 m obstacle placed at the midpoint of the walkway. The results indicated that subjects with PD crossed the obstacle slower than CTRL subjects and that concurrent music differentially altered obstacle crossing behaviors for the CTRL subjects and subjects with PD. Subjects with PD further decreased obstacle-crossing velocities and maintained spatial parameters in the music condition. In contrast, CTRL subjects maintained all spatiotemporal parameters of obstacle crossing with music. The alterations to crossing behaviors observed among the subjects with PD support our previous suggestion that listening to music while walking may be an attentionally demanding task.
'Jumping like a girl': Discursive silences, exclusionary practices, and the controversy over women's ski jumping
(Taylor and Francis, 2010) Laurendeau, Jason; Adams, Carly
This paper considers the recent International Olympic Committee (IOC) decision to deny women the opportunity to compete in ski jumping at the 2010 Winter Olympics in Vancouver, Canada. Drawing on a feminist Foucauldian framework, we suggest that the Olympics is a discourse that constructs excellence and fairness as “within the true,” with the IOC protesting that this recent decision is not about gender, but about the upholding of Olympic ideals. We interrogate three conspicuous absences in this discourse, each of which trouble the IOC’s claim that this decision is not evidence of gender discrimination. In particular, we contextualize this decision within the risk discourses upon which the IOC has historically drawn on denying women’s participation in particular Olympic events, arguing that the discursive silence around the issue of risk points to “old wine in new bottles” as the IOC dresses up the same paternalistic practices in new garb. We conclude with a consideration of these discursive structures as more than simply oppressive of women. Instead, they may also be understood as indicative of the ‘problem’ posed by women, especially those who threaten the gender binary that pervades many sporting structures. Finally, these structures signal opportunities for resistance and subversion as women act to shed light on the discursive silences upon which structures of domination rest.
Walking with music is a safe and viable tool for gait training in Parkinson's disease: the effect of a 13-week feasibility study on single and dual task walking
(Hindawi Publishing Corporation, 2010) de Bruin Nutley, Natalie; Doan, Jon B.; Turnbull, George; Suchowersky, Oksana; Bonfield, Stephan; Hu, Bin; Brown, Lesley
This study explored the viability and efficacy of integrating cadence-matched, salientmusic into a walking intervention for patients with Parkinson’s disease (PD). Twenty-two people with PD were randomised to a control (CTRL, n = 11) or experimental (MUSIC, n = 11) group. MUSIC subjects walked with an individualised music playlist three times a week for the intervention period. Playlists were designed to meet subject’s musical preferences. In addition, the tempo of the music closely matched (±10– 15 bpm) the subject’s preferred cadence. CTRL subjects continued with their regular activities during the intervention. The effects of training accompanied by “walking songs” were evaluated using objective measures of gait score. The MUSIC group improved gait velocity, stride time, cadence, and motor symptom severity following the intervention. This is the first study to demonstrate that music listening can be safely implemented amongst PD patients during home exercise.
Supervised places to play: social reform, citizenship, and femininity at municipal playgrounds in London, Ontario, 1900-1942
(Ontario Historical Society, 2011) Adams, Carly
In early 20th century Canada, middle-class social reformers campaigned for urban parks and supervised playgrounds to provide children with appropriate places for leisure activities. Drawing on adult memories of participating in playgrounds in London, Ontario, this study explores the issues and complexities of establishing the playground program in London and, more specifically, the opportunities provided for girls and young women to learn and play sport. I consider the implications of social and moral reform initiatives on leisure spaces, and the impact of the delivery of social welfare at the municipal level on the lives of female participants.
Working stiff(s) on reality television during the Great Recession
(M D P I A G, 2012) Brayton, Sean
This essay traces some of the narratives and cultural politics of work on reality television after the economic crash of 2008. Specifically, it discusses the emergence of paid labor shows like Ax Men, Black Gold and Coal and a resurgent interest in working bodies at a time when the working class in the US seems all but consigned to the dustbin of history. As an implicit response to the crisis of masculinity during the Great Recession these programs present an imagined revival of manliness through the valorization of muscle work, which can be read in dialectical ways that pivot around the white male body in peril. In Ax Men, Black Gold and Coal, we find not only the return of labor but, moreover, the re-embodiment of value as loggers, roughnecks and miners risk both life and limb to reach company quotas. Paid labor shows, in other words, present a complicated popular pedagogy of late capitalism and the body, one that relies on anachronistic narratives of white masculinity in the workplace to provide an acute critique of expendability of the body and the hardships of physical labor.
On the evolution of handedness: evidence for feeding biases
(Public Library of Science, 2013) Flindall, Jason W.; Gonzalez, Claudia L. R.
Many theories have been put forward to explain the origins of right-handedness in humans. Here we present evidence that this preference may stem in part from a right hand advantage in grasping for feeding. Thirteen participants were asked to reach-to-grasp food items of 3 different sizes: SMALL (CheeriosH), MEDIUM (Froot LoopsH), and LARGE (Oatmeal SquaresH). Participants used both their right- and left-hands in separate blocks (50 trials each, starting order counterbalanced) to grasp the items. After each grasp, participants either a) ate the food item, or b) placed it inside a bib worn beneath his/her chin (25 trials each, blocked design, counterbalanced). The conditions were designed such that the outward and inward movement trajectories were similar, differing only in the final step of placing it in the mouth or bib. Participants wore Plato liquid crystal goggles that blocked vision between trials. All trials were conducted in closed-loop with 5000 ms of vision. Hand kinematics were recorded by an Optotrak Certus, which tracked the position of three infrared diodes attached separately to the index finger, thumb, and wrist. We found a task (EAT/PLACE) by hand (LEFT/RIGHT) interaction on maximum grip aperture (MGA; the maximum distance between the index finger and thumb achieved during grasp pre-shaping). MGAs were smaller during right-handed movements, but only when grasping with intent to eat. Follow-up tests show that the RIGHT-HAND/EAT MGA was significantly smaller than all other hand/task conditions. Because smaller grip apertures are typically associated with greater precision, our results demonstrate a right-hand advantage for the grasp-to-eat movement. From an evolutionary perspective, early humans may have preferred the hand that could grasp food with more precision, thereby maximizing the likelihood of retrieval, consumption, and consequently, survival.
"Left neglected," but only in far space: spatial biases in healthy participants revealed in a visually guided grasping task
(Frontiers Media, 2014) de Bruin Nutley, Natalie; Bryant, Devon C.; Gonzalez, Claudia L. R.
Hemispatial neglect is a common outcome of stroke that is characterized by the inability to orient toward, and attend to stimuli in contralesional space. It is established that hemispatial neglect has a perceptual component, however, the presence and severity of motor impairments is controversial. Establishing the nature of space use and spatial biases during visually guided actions amongst healthy individuals is critical to understanding the presence of visuomotor deficits in patients with neglect. Accordingly, three experiments were conducted to investigate the effect of object spatial location on patterns of grasping. Experiment 1 required right-handed participants to reach and grasp for blocks in order to construct 3D models.The blocks were scattered on a tabletop divided into equal size quadrants: left near, left far, right near, and right far. Identical sets of building blockswere available in each quadrant. Space use was dynamic, with participants initially grasping blocks from right near space and tending to “neglect” left far space until the final stages of the task. Experiment 2 repeated the protocol with left-handed participants. Remarkably, left-handed participants displayed a similar pattern of space use to right-handed participants. In Experiment 3 eye movements were examined to investigate whether “neglect” for grasping in left far reachable space had its origins in attentional biases. It was found that patterns of eye movements mirrored patterns of reach-to-grasp movements.We conclude that there are spatial biases during visually guided grasping, specifically, a tendency to neglect left far reachable space, and that this “neglect” is attentional in origin.The results raise the possibility that visuomotor impairments reported among patients with right hemisphere lesions when working in contralesional space may result in part from this inherent tendency to “neglect” left far space irrespective of the presence of unilateral visuospatial neglect.
Prenatal enrichment and recovery from perinatal cortical damage: effects of maternal complex housing
(Frontiers Research Foundation, 2014) Gibb, Robbin L.; Gonzalez, Claudia L. R.; Kolb, Bryan
Birth is a particularly vulnerable time for acquiring brain injury. Unfortunately, very few treatments are available for those affected. Here we explore the effectiveness of prenatal intervention in an animal model of early brain damage. We used a complex housing paradigm as a form of prenatal enrichment. Six nulliparous dams and one male rat were placed in complex housing (condomom group) for 12 h per day until the dams’ delivered their pups. At parturition the dams were left in their home (standard) cages with their pups. Four dams were housed in standard cages (cagemom group) throughout pregnancy and with their pups until weaning. At postnatal day 3 (P3) infants of both groups received frontal cortex removals or sham surgery. Behavioral testing began on P60 and included the Morris water task and a skilled reaching task. Brains were processed for Golgi analyses. Complex housing of the mother had a significant effect on the behavior of their pups. Control animals from condomom group outperformed those of the cagemom group in the water task. Condomom animals with lesions performed better than their cagemom cohorts in both the water task and in skilled reaching. Codomom animals showed an increase in cortical thickness at anterior planes and thalamic area at both anterior and posterior regions. Golgi analyses revealed an increase in spine density. These results suggest that prenatal enrichment alters brain organization in manner that is prophylactic for perinatal brain injury. This result could have significant implications for the prenatal management of infants expected to be at risk for difficult birth.
Getting the right grasp on executive function
(Frontiers, 2014) Gonzalez, Claudia L. R.; Mills, Kelly J.; Genee, Inge; Li, Fangfang; Piquette-Tomei, Noëlla A.; Rosen, Nicole; Gibb, Robbin L.
Executive Function (EF) refers to important socio-emotional and cognitive skills that are known to be highly correlated with both academic and life success. EF is a blanket term that is considered to include self-regulation, working memory, and planning. Recent studies have shown a relationship between EF and motor control. The emergence of motor control coincides with that of EF, hence understanding the relationship between these two domains could have significant implications for early detection and remediation of later EF deficits. The purpose of the current study was to investigate this relationship in young children. This study incorporated the Behavioral Rating Inventory of Executive Function (BRIEF) and two motor assessments with a focus on precision grasping to test this hypothesis.The BRIEF is comprised of two indices of EF: (1) the Behavioral Regulation Index (BRI) containing three subscales: Inhibit, Shift,and Emotional Control; (2) the Metacognition Index (MI) containing five subscales: Initiate, Working Memory, Plan/Organize, Organization of Materials, and Monitor. A global executive composite (GEC) is derived from the two indices. In this study, right-handed children aged 5–6 and 9–10 were asked to: grasp-to-construct (Lego®models); and grasp-to-place (wooden blocks), while their parents completed the BRIEF questionnaire. Analysis of results indicated significant correlations between the strength of right hand preference for grasping and numerous elements of the BRIEF including the BRI, MI, and GEC. Specifically, the more the right hand was used for grasping the better the EF ratings. In addition, patterns of space-use correlated with the GEC in several subscales of the BRIEF. Finally and remarkably, the results also showed a reciprocal relationship between hand and space use for grasping and EF. These findings are discussed with respect to: (1) the developmental overlap of motor and executive functions; (2) detection of EF deficits through tasks that measure lateralization of hand and space use; and (3) the possibility of using motor interventions to remediate EF deficits.
Grasping without sight: insights from the congenitally blind
(Public Library of Science, 2014) Stone, Kayla D.; Gonzalez, Claudia L. R.
We reach for and grasp different sized objects numerous times per day. Most of these movements are visually-guided, but some are guided by the sense of touch (i.e. haptically-guided), such as reaching for your keys in a bag, or for an object in a dark room. A marked right-hand preference has been reported during visually-guided grasping, particularly for small objects. However, little is known about hand preference for haptically-guided grasping. Recently, a study has shown a reduction in right-hand use in blindfolded individuals, and an absence of hand preference if grasping was preceded by a short haptic experience. These results suggest that vision plays a major role in hand preference for grasping. If this were the case, then one might expect congenitally blind (CB) individuals, who have never had a visual experience, to exhibit no hand preference. Two novel findings emerge from the current study: first, the results showed that contrary to our expectation, CB individuals used their right hand during haptically-guided grasping to the same extent as visually-unimpaired (VU) individuals did during visually-guided grasping. And second, object size affected hand use in an opposite manner for haptically- versus visually-guided grasping. Big objects were more often picked up with the right hand during hapticallyguided, but less often during visually-guided grasping. This result highlights the different demands that object features pose on the two sensory systems. Overall the results demonstrate that hand preference for grasping is independent of visual experience, and they suggest a left-hemisphere specialization for the control of grasping that goes beyond sensory modality
Factors influencing the effectiveness of axe kick in taekwon-do
(Archives of Budo, 2014) Wasik, Jacek; Shan, Gongbing
Background: Taekwon-do is famous for its powerful kicking techniques and the axe kick is the challenging one, aiming at kicking high section of an opponent. The relevance of the skill in the traditional version of taekwon-do is that a single strike might happen to reveal the winner. The main aims of the study were 1) the kinematic characteristics of the axe kick using motion capture technology and 2) the kinematics conditions leading to maximization of kick effectiveness. Material & Methods: Six International Taekwon-do Federation (ITF) practitioners participated in the study and each of them performed the axe kick (neryo chagi) three times. Using a 3D motion capture technology, selected parameters such as maximum kick foot velocity, durations of take-off, the upswing, the downswing as well as the whole kick and the kick leg angle at maximum velocity were quantitatively determined. The basic descriptive statistics (means & standard deviations) and correlation analyses were performed for revealing the dominant factors related to the kick. Results: The results indicate that the maximum kick power appears around 45º of the kick leg to vertical direction or 85-89% of one’s body height (i.e. the optimal offence/attack height) during the downswing. The variation of the optimal offense height depends on one’s body height, gender and race. And the keys for increasing the kick effectiveness are balanced weight transfer, large hip ROM for pre-lengthening hip extensors and follows an explosive foot downswing for maximizing kick-foot power. Conclusions: The above observations: the maximal kick power occurs around 45° of the kick-leg to the vertical direction during the downswing; shortening the downswing phase could increase the axe kick quality further.
Speech in action: degree of hand preference for grasping predicts speech articulation competence in children
(Frontiers Media, 2014) Gonzalez, Claudia L. R.; Li, Fangfang; Mills, Kelly J.; Rosen, Nicole; Gibb, Robbin L.
Degree of lateralization for grasping predicts the maturity of the language production system in young, typically-developing children. In this report we provide compelling evidence for the relationship between right hand grasp-to-mouth (i.e.,feeding) movements and language development. Specifically, we show that children (4–5years old) who are more right-hand lateralized in picking up small food items for consumption show enhanced differentiation of the “s” and “sh” sounds. This result suggests that left hemisphere control of hand-to-mouth gestures may have provided an evolutionary platform for the development of language. The current investigation presents the exciting possibility that early right hand-to-mouth training could accelerate the development of articulation skills.
Kinematics of the turning kick: measurements obtained in testing well-trained taekwon-do athletes
(Archives of Budo, 2015) Wasik, Jacek; Shan, Gongbing
Background & Study Aim: The aim of the paper is the influence of selected kinematic factors on the turning kick technique. This issue is practically relevant in the traditional version of taekwon-do, where an effectively performed strike may divulge the winner. Material & Method: Using 3D motion capture technology, six International Taekwon-do Federation athletes were tested. Biomechanical parameters related to range of motion, kick power and kick time were applied in the analyses. The athletes executed the turning kick three times in a way typically applied in a board breaking kick. The quantification focused on the speed changes related to kicking leg extension, the maximum knee and foot velocities in the Cartesian coordinate system and the total time of kick execution. The descriptive statistics (i.e. average values and the standard deviations) and correlation analysis were applied in data analysis. Results: The results have shown that the effect of the kick is mainly represented by component of kick foot velocity in frontal – and lateral-directions. The correlation analyses unveil that the maximal knee speeds reached in frontal – and lateral-directions as well as foot take-off velocity in frontal – and vertical-directions are highly correlated to kick foot effectiveness (r = 0.60 to 0.87). The analysis of velocity development in relation to kick leg extension divulges that the maximal velocity occurs around 80% of a full leg extension. Conclusion: For increasing kick effectiveness, athletes should work on the foot take-off velocity, the dynamics of the knee motion and consider the optimum kick length for kicking power maximization.
Evidence for right-handed feeding biases in a left-handed population
(Taylor & Francis, 2015) Flindall, Jason W.; Stone, Kayla D.; Gonzalez, Claudia L. R.
We have recently shown that actions with similar kinematic requirements but different end-state goals may be supported by distinct neural networks. Specifically, we demonstrated that when right-handed individuals reach-to-grasp food items with intent to eat, they produce smaller maximum grip apertures (MGAs) than when they grasp the same item with intent to place it in a location near the mouth. This effect was restricted to right-handed movements; left-handed movements showed no difference between tasks. The current study investigates whether (and to which side) the effect may be lateralized in left-handed individuals. Twenty-one self-identified left-handed participants grasped food items of three different sizes while grasp kinematics were captured via an Optotrak Certus motion capture array. A main effect of task was identified wherein the grasp-to-eat action generated significantly smaller MGAs than did the grasp-to-place action. Further analysis revealed that similar to the findings in right-handed individuals, this effect was significant only during right-handed movements. Upon further inspection however, we found individual differences in the magnitude and direction of the observed lateralization. These results underscore the evolutionary significance of the grasp-to-eat movement in producing population-level right-handedness in humans as well as highlighting the heterogeneity of the left-handed population.
Perception of safe horizontal reaching distance changes with repetitive occupational loading in novice lifters
(Elsevier, 2015) McCubbing, Dustin C.; Shan, Gongbing; Gonzalez, Claudia L. R.; Awosoga, Olu A.; Doan, Jon B.
Safe work behaviours rely on accurate perceptions of injury risks, and workers who have a misperception of risk can be injured. Despite the importance of perception-action coupling, little is known about modification of those perceptions with changing physical or cognitive STATE. It is hypothesized that changing values for perceived affordances could evidence these modifications. A better understanding of how worker characteristics (e.g., level of fatigue) affect perceptions of affordance and their corresponding behaviours, may help when developing strategies for ergonomic best practices, particularly in manual material handling (MMH) activities. The aim of this study was to compare safe perceptions of affordance from workers that completed repetitive STATE loading. Seventy-five novice MMH workers (23 male; mean age = 21.43, SD = 3.24) made perceived affordances of their safest horizontal reaching distance (acceptable limit) to complete a model task. STATE loading consisted of physical or cognitive fatigue or a control. The levels of fatigue were assessed at five-minute intervals using Ratings of Perceived Exertion (RPE) values and Multi-Fatigue Inventory (MFI) values, respectively. A significant main effect of TIME indicated a decrease of perceived safest reaching distance observed from baseline through subsequent measurements (p<.001). The magnitude of these changes did not differ significantly between groups, suggesting that general learning more than specific STATE loading may be a major contributor to modification of affordance perceptions. However, it remains important to consider TIME and STATE influences on perceptions for safe occupational handling. Novice workers’ initial perceptions of safe working affordance may put them at risk for soft tissue injury. Physical and cognitive loading similarly affect perceived safe affordances.
Hand preference across the lifespan: effects of end-goal, task nature, and object location
(Frontiers Media, 2015) Gonzalez, Claudia L. R.; Flindall, Jason W.; Stone, Kayla D.
In the present study we investigate age-related changes in hand preference for grasping and the influence of task demands on such preference. Children (2–11), young-adults (17–28) and older-adults (57–90 ) were examined in a grasp-to-eat and a grasp-to-construct task. The end-goal of these tasks was different (eat vs.construct) as was the nature of the task(unimanual vs. bimanual). In both tasks,ipsilateral and contralateral grasps were analyzed. Results showed a right-hand preference that did not change with age. Across the three age groups, a more robust right-hand preference was observed for the unimanual, grasp-to-eat task. To disentangle if the nature (unimanual) or the end-goal (grasp-to-eat) was the driver of the robust right-hand preference,a followup experiment was conducted.Young-adult participants completed a unimanual grasp-to-place task. This was contrasted with the unimanual grasp-to-eat task and the bimanual grasp-to-construct task.Rates of hand preference for the grasp-to-eat task remained the highest when compared to the other two grasping tasks. Together, the results demonstrate that hand preference remains stable from childhood to older adulthood, and they suggest that a left hemisphere specialization exists for grasping, particularly when bringing food to the mouth.
The contributions of vision and haptics to reaching and grasping
(Frontiers Media, 2015) Stone, Kayla D.; Gonzalez, Claudia L. R.
This review aims to provide a comprehensive outlook on the sensory (visual and haptic) contributions to reaching and grasping. The focus is on studies in developing children, normal, and neuropsychological populations, and in sensory-deprived individuals. Studies have suggested a right-hand/left-hemisphere specialization for visually guided grasping and a left-hand/right-hemisphere specialization for haptically guided object recognition. This poses the interesting possibility that when vision is not available and grasping relies heavily on the haptic system, there is an advantage to use the left hand. We review the evidence for this possibility and dissect the unique contributions of the visual and haptic systems to grasping. We ultimately discuss how the integration of these two sensory modalities shape hand preference.