Anatomic motor point localization of the biceps brachii and brachialis muscles

Byung Kyu Park, Beom Shin Yong, Hyun Yoon Ko, Heung Park Jae, Sun Yong Baek

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Injection of the neurolytic agents into motor points of the biceps brachii or brachialis muscles is an effective treatment of spasticity of the elbow flexors in many stroke survivors. Accurate localization of the motor points of each muscle is necessary for enhancing the efficacy of motor point blocks. To identify the precise locations of the motor points (terminal nerve endings) of the biceps brachii and brachialis muscles in relation to anatomic surface landmarks for motor point blocks, we dissected 23 limbs from 12 cadavers. A reference line was defined as a line connecting the coracoid process with the lateral epicondyle of the humerus. The location of the motor points of the biceps brachii and brachialis muscles was identified in reference to the reference line. The motor point of the biceps brachii muscle was found to be approximately half of the reference line. In the brachialis muscle, the location of the motor point was 70% of the reference line from the coracoid process and 2 cm medial to the line. The results are expected to facilitate effective localization of the motor point block of these muscles in selective motor nerve block.

Original languageEnglish
Pages (from-to)459-462
Number of pages4
JournalJournal of Korean Medical Science
Volume22
Issue number3
Publication statusPublished - 2007 Jul 12

Fingerprint

Muscles
Anatomic Landmarks
Nerve Endings
Nerve Block
Humerus
Elbow
Cadaver
Extremities
Stroke
Injections
Coracoid Process
Therapeutics

Keywords

  • Elbow
  • Flexor
  • Muscle spasticity
  • Nerve block
  • Nerve endings

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Anatomic motor point localization of the biceps brachii and brachialis muscles. / Park, Byung Kyu; Yong, Beom Shin; Ko, Hyun Yoon; Jae, Heung Park; Baek, Sun Yong.

In: Journal of Korean Medical Science, Vol. 22, No. 3, 12.07.2007, p. 459-462.

Research output: Contribution to journalArticle

Park, Byung Kyu ; Yong, Beom Shin ; Ko, Hyun Yoon ; Jae, Heung Park ; Baek, Sun Yong. / Anatomic motor point localization of the biceps brachii and brachialis muscles. In: Journal of Korean Medical Science. 2007 ; Vol. 22, No. 3. pp. 459-462.
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