Biceps brachii long head overactivity associated with elbow flexion contracture in brachial plexus birth palsy.

The Journal of Bone and Joint Surgery. American Volume
Lindsey C ShefflerMichelle A James

Abstract

The etiology of elbow flexion contracture in children with brachial plexus birth palsy remains unclear. We hypothesized that the long head of the biceps brachii muscle assists with shoulder stabilization in children with brachial plexus birth palsy and that overactivity of the long head during elbow and shoulder activity is associated with an elbow flexion contracture. Twenty-one patients with brachial plexus birth palsy-associated elbow flexion contracture underwent testing with surface electromyography. Twelve patients underwent repeat testing with fine-wire electromyography. Surface electrodes were placed on the muscle belly, and fine-wire electrodes were inserted bilaterally into the long and short heads of the biceps brachii. Patients were asked to perform four upper extremity tasks: elbow flexion-extension, hand to head, high reach, and overhead ball throw. The mean duration of muscle activity in the affected limb was compared with that in the contralateral, unaffected limb, which was used as a control. Three-dimensional motion analysis, surface dynamometry, and validated function measures were used to evaluate upper extremity kinematics, elbow flexor-extensor muscle imbalance, and function. The mean activity duration of ...Continue Reading

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Citations

Apr 4, 2015·Journal of Hand Therapy : Official Journal of the American Society of Hand Therapists·Idris S GharbaouiScott H Kozin
Jun 18, 2015·Journal of Plastic Surgery and Hand Surgery·Christopher J CoroneosJames R Bain
Apr 21, 2017·Physical & Occupational Therapy in Pediatrics·S V DuffL Fetters
Sep 11, 2014·Journal of Pediatric Orthopedics·Sarah E SibbelMichelle A James
Sep 12, 2018·The Journal of Hand Surgery, European Volume·Andrew E PriceJohn A I Grossman
Dec 11, 2019·Journal of Pediatric Orthopedics·Lindsey C ValoneAndrea S Bauer
Jun 6, 2020·Journal of Pediatric Orthopedics·Lindsey C ValoneAndrea S Bauer
Apr 23, 2019·Journal of Pediatric Rehabilitation Medicine·Emily S HoF Virginia Wright
Jul 27, 2021·Indian Journal of Orthopaedics·Filippo Maria SénèsNunzio Catena

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