Dorsoepitrochlearis
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An accessory latissimus-like slip to the elbow region — occasionally found in anatomical dissections and can compress axillary structures.
Function
May assist arm adduction/extension
Origin
Latissimus dorsi or scapular/inferior angle region
Insertion
Medial intermuscular septum or medial epicondyle/olecranon fascia
Innervation
Thoracodorsal nerve or related brachial plexus branches