Open AccessThe effect of limb position on a static knee extension task can be explained with a simple spinal cord circuit model
Author(s) -
Gareth York,
Hugh Osborne,
Piyanee Sriya,
Sarah Astill,
Marc de Kamps,
Samit Chakrabarty
Publication year - 2022
Publication title -
journal of neurophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 245
eISSN - 1522-1598
pISSN - 0022-3077
DOI - 10.1152/jn.00208.2021
Subject(s) - spinal cord , task (project management) , simple (philosophy) , position (finance) , extension (predicate logic) , neuroscience , physical medicine and rehabilitation , computer science , psychology , medicine , engineering , philosophy , epistemology , systems engineering , finance , economics , programming language
The role of sensory feedback in motor control when limbs are held in a fixed position is disputed. We performed a novel experiment involving fixed position tasks based on two common clinical tests. We identified patterns of muscle activity during the tasks that changed with different leg positions and then inferred how sensory feedback might influence the observations. We developed a computational model that required three distinct inputs to reproduce the activity patterns observed experimentally. The model provides a neural explanation for how the activity patterns can be changed by sensory feedback.