Spinal reflex activity: a marker for neuronal functionality after spinal cord injury.

Abstract:

BACKGROUND:Alterations in the function of spinal neuronal circuits underlying locomotion after a spinal cord injury (SCI) are associated with changes in the behavior of spinal reflexes (SRs) in both rats and humans. In healthy subjects, the SR consists of a dominant early reflex component, whereas in chronic, severely affected SCI subjects, a later component dominates. OBJECTIVE:The aim of this study was to investigate the relationship between SR behavior and walking ability in para-/tetraplegic subjects. METHOD:The SR was evoked by nonnoxious tibial nerve stimulation. Walking ability was assessed by functional tests and questionnaires. RESULTS:There was a correlation between walking ability and SR behavior in chronic SCI: Severely affected SCI subjects unable to walk showed dominant late SR components, whereas in ambulatory SCI subjects an early SR component dominated. A functional training with an improvement of locomotor ability was accompanied by both a shift from a dominant to a smaller late and the appearance of an early SR component. CONCLUSIONS:Our findings indicate that SR can serve as a marker for the locomotor ability of SCI subjects. Neuronal plasticity exploited by a functional training is reflected in both an improvement of locomotor ability and a change in balance of SR components toward the early SR component.

authors

Hubli M,Dietz V,Bolliger M

doi

10.1177/1545968311420844

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

188-96

issue

2

eissn

1545-9683

issn

1552-6844

pii

1545968311420844

journal_volume

26

pub_type

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