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Pamela J. Hoyes Beehler

Hand laterality research efforts have shown a performance advantage in terms of pointing accuracy and limb speed (movement time—MVT) for the preferred hand (right-hand), and a slight reaction time (RT) performance advantage for the non-preferred hand (left-hand) for rapid manual aiming movements (Flowers, 1975; Roy, 1983; Roy & Elliott, 1986). These performance advantages for the right and left-hands, respectively, are considered an enigma in the motor behavior literature (Magill, 1993) and were investigated. The purpose of this study was to determine the effects of skill level, hand laterality, and movement direction during visuomotor processing of female athletes performing manual aiming tasks. Results showed that skill level and hand laterality did not influence the initiation of manual aiming movements; but, left direction movements were initiated faster than right direction movements. Right-hand MVT was faster than left-hand MVT; but, main effects skill level and movement direction were not significant for MVT. Skill level did interact with hand laterality and movement direction for MVT. Also, right-hand right direction movements were the easiest manual aiming tasks to complete while left-hand right direction movements were the most difficult manual aiming tasks to complete. Differences in hemispheric visuomotor processing when performing manual aiming movements based on skill level and hand laterality were discussed. Training implications for manual aiming movements were also discussed.

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Jenny Meggs, Mark Chen and Danielle Mounfield

). Digit ratio (2D4D), lateral preferences, and performance in fencing . Perceptual and Motor Skills, 103 , 427 – 446 . PubMed ID: 17165406 doi:10.2466/pms.103.2.427-446 10.2466/PMS.103.6.427-446 Voracek , M. , Tran , U.S. , & Dressler , S.G. ( 2010 ). Digit ratio (2D4D) and sensation seeking

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Hendrik Reimann, Tyler Fettrow and John J. Jeka

balance during locomotion. For each of these different actions, or strategies, we briefly review the available evidence for humans actually utilizing them from the literature. We focus mainly on the medial-lateral direction of balance, because it is mechanically less stable in walking than the anterior

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Ryota Nishiyori and Beverly D. Ulrich

their results to suggest that activity between these two areas is high and diverse as infants explore and practice this new skill, being lower pre-skill onset and after the skill is well learned. They related these results to the fact that reaching laterality is also low in non-walkers and novice

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Bradley D. Hatfield

intrusions (p. 804).” Specifically, they reported that the posterior cingulate, the amygdala–forebrain complex, and the basal ganglia were active only in the novices while, in contrast, the experts exhibited activation primarily in the superior parietal lobule, the dorsal lateral premotor area, and the

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Howard N. Zelaznik

: Evidence for a common timing mechanism . Journal of Experimental Psychology: Human Perception and Performance, 21 , 3 – 18 . Ivry , R.B. , Keele , S.W. , & Diener , H.C. ( 1988 ). Dissociation of the lateral and medial cerebellum in movement timing and movement execution . Experimental Brain

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David I. Anderson

2014 study, Corbetta et al. specifically examined whether a previously documented increase in bimanual reaching, and an associated decrease in manual laterality (i.e., reduction in preference for using a particular hand), after the onset of walking ( Corbetta & Bojczyk, 2002 ) would be associated with

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John H. Challis

embryonic and post-embryonic growth . Journal of Zoology, 198 ( Oct ), 215 – 225 . 10.1111/j.1469-7998.1982.tb02071.x Challis , J.H. ( 1998 ). An investigation of the influence of bi-lateral deficit on human jumping . Human Movement Science, 17 ( 3 ), 307 – 325 . doi:10.1016/S0167

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Per G. Svensson, Seungmin Kang and Jae-Pil Ha

distribution of leadership functions can enable organizations to better integrate the diverse skills and/or knowledge of individual members into collective decision making ( Pearce & Manz, 2005 ). Shared leadership processes involve peer or lateral influence and at other times involve upward or downward

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Amanda Kastrinos, Rachel Damiani and Debbie Treise

example, Lerner ( 2006 ) identified Lou Gehrig as the first “celebrity patient.” As a celebrated hitter for the New York Yankees, Gehrig received intense media attention when he was diagnosed with amyotrophic lateral sclerosis (ALS) in 1938, and as a result, this previously unknown disease was ushered