Biceps brachii muscle

Changed by Henry Knipe ◉ , 8 Jan 2016

Updates to Article Attributes

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The biceps brachii muscle (also known simply as biceps) is a two-headed muscle in the anterior compartment of the arm that flexes at the elbow and supinates the forearm.

origin
- short head: coracoid process (of the humerus)
- long head: supraglenoid tubercle of the scapula
insertion: radial tuberosity of the proximal radius
innervation: musculocutaneous nerve
action
- shoulder joint
  - long head: arm abduction
  - short head: arm adduction and ventral flexion
- elbow joint
  - supination of the pronated forearm
  - flexion of the supinated forearm

Variant anatomy

duplicated long head of biceps tendon: can mimic longitudinal tear ¹

References changed:

1. B. J. Manaster, David A. May, David G. Disler. Musculoskeletal Imaging,The Requisites (Expert Consult- Online and Print),4. (2013) ISBN: 9780323081771 - <a href="http://books.google.com/books?vid=ISBN9780323081771">Google Books</a>