left infraspinatus muscle
Muscular systemUpper limbLeftFMA32548
Nomenclature
left infraspinatus muscle
musculus infraspinatus (Latin)
muscolo sottospinato sinistro (Italian)
Descriptionentry
Muscle of the infraspinous fossa, the posterior component of the rotator cuff.
Functionentry
Lateral rotation of the arm; stabilises the humeral head.
Originentry
Infraspinous fossa of the scapula.
Insertionentry
Middle facet of the greater tubercle of the humerus.
Innervationentry
Suprascapular nerve (C5-C6).
Blood supplyentry
Suprascapular and circumflex scapular arteries.
Clinical notes
Wasting is a sign of suprascapular neuropathy or of a cuff tear.
Model