KIT | KIT-Bibliothek | Impressum | Datenschutz

Similar stretch reflexes and behavioral patterns are expressed by the dominant and nondominant arms during postural control

Maurus, Philipp 1; Kurtzer, Isaac; Antonawich, Ryan; Cluff, Tyler
1 Institut für Sport und Sportwissenschaft (IfSS), Karlsruher Institut für Technologie (KIT)

Abstract:

Limb dominance is evident in many daily activities, leading to the prominent idea that each hemisphere of the brain specializes in controlling different aspects of movement. Past studies suggest that the dominant arm is primarily controlled via an internal model of limb dynamics that enables the nervous system to produce efficient movements. In contrast, the nondominant arm may be primarily controlled via impedance mechanisms that rely on the strong modulation of sensory feedback from individual joints to control limb posture. We tested whether such differences are evident in behavioral responses and stretch reflexes following sudden displacement of the arm during posture control. Experiment 1 applied specific combinations of elbow-shoulder torque perturbations (the same for all participants). Peak joint displacements, return times, end point accuracy, and the directional tuning and amplitude of stretch reflexes in nearly all muscles were not statistically different between the two arms. Experiment 2 induced specific combinations of joint motion (the same for all participants). Again, peak joint displacements, return times, end point accuracy, and the directional tuning and amplitude of stretch reflexes in nearly all muscles did not differ statistically when countering the imposed loads with each arm. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000191084
Veröffentlicht am 03.03.2026
Originalveröffentlichung
DOI: 10.1152/jn.00152.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Sport und Sportwissenschaft (IfSS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0022-3077, 1522-1598
KITopen-ID: 1000191084
Erschienen in Journal of neurophysiology
Verlag American Physiological Society
Band 126
Heft 3
Seiten 743-762
KIT – Die Universität in der Helmholtz-Gemeinschaft
KITopen Landing Page