Facilitation of triceps brachii muscle contraction by tendon vibration after chronic cervical spinal cord injury

Edith Ribot-Ciscar, Jane E. Butler, Christine K Thomas

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

One way to improve the weak triceps brachii voluntary forces of people with chronic cervical spinal cord injury may be to excite the paralyzed or submaximally activated fraction of muscle. Here we examined whether elbow extensor force was enhanced by vibration (80 Hz) of the triceps or biceps brachii tendons at rest and during maximum isometric voluntary contractions (MVCs) of the elbow extensors performed by spinal cord-injured subjects. The mean ± SE elbow extensor MVC force was 22 ± 17.5 N (range: 0-23% control force, n = 11 muscles). Supramaximal radial nerve stimuli delivered during elbow extensor MVCs evoked force in six muscles that could be stimulated selectively, suggesting potential for force improvement. Biceps vibration at rest always evoked a tonic vibration reflex in biceps, but extension force did not improve with biceps vibration during triceps MVCs. Triceps vibration induced a tonic vibration reflex at rest in one-half of the triceps muscles tested. Elbow extensor MVC force (when >1% of control force) was enhanced by vibration of the triceps tendon in one-half of the muscles. Thus triceps, but not biceps, brachii tendon vibration increases the contraction strength of some partially paralyzed triceps brachii muscles.

Original languageEnglish
Pages (from-to)2358-2367
Number of pages10
JournalJournal of Applied Physiology
Volume94
Issue number6
StatePublished - Jun 1 2003

Fingerprint

Muscle Contraction
Vibration
Spinal Cord Injuries
Tendons
Isometric Contraction
Elbow
Muscles
Reflex
Radial Nerve
Cervical Cord
Spinal Cord

Keywords

  • Antagonist vibratory response
  • Maximum voluntary contraction
  • Muscle paralysis
  • Muscle weakness
  • Tonic vibration reflex

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Facilitation of triceps brachii muscle contraction by tendon vibration after chronic cervical spinal cord injury. / Ribot-Ciscar, Edith; Butler, Jane E.; Thomas, Christine K.

In: Journal of Applied Physiology, Vol. 94, No. 6, 01.06.2003, p. 2358-2367.

Research output: Contribution to journalArticle

Ribot-Ciscar, Edith ; Butler, Jane E. ; Thomas, Christine K. / Facilitation of triceps brachii muscle contraction by tendon vibration after chronic cervical spinal cord injury. In: Journal of Applied Physiology. 2003 ; Vol. 94, No. 6. pp. 2358-2367.
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