Anatomy and innervation of the infraspinatus muscle

How is the infraspinatus muscle anatomically structured and innervated?

There is ongoing debate on the anatomical arrangement and pattern of innervation of the infraspinatus. More specifically, it remains unclear whether the muscle is bipennate, multipennate or composed of two separate compartments and if the suprascapular nerve branches into two or more motor branches in the infraspinous fossa.


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