EDKP 447 Lecture Notes - Lecture 9: Anatomical Terms Of Location, Proprioception, Golgi Tendon Organ
21 Dec 2017
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Results = h-reflex specifically strongly modulated in amplitude during walking cycle. Foot flat ff to toe off to *high reflex sensitivity. *h-reflex = changes independently of lpha motor neurons *since m-wave normalized. *even at equal stimulus strength & emg level. During standing = h-reflex always 3. 5x larger than. Explains why as h-reflex increase= m-wave decrease. Regulation of h-reflex = depend on contraction intensity/central. *level of lpha motor neurons excitability = just 1 reasons. Also influenced by reflex-sensitivity & reflex threshold. *modulated by higher central drive with some input from central drive. = still preferential intensity by cortex central drive that regulate phases of gait. Ex: foot flat ff to toe off to = higher due to posture stabilization requirement. H-reflex at effector level = spinal cord & muscle. But h-reflex during walking/standing= receive input from sensory feedback & executive centers. *so different h-reflex & m1 for different conditions. During walking distance between stimulating electrode & muscle = changing.
