Infraspinatus muscle

infraspinatus muscle

SHORT DESCRIPTION

• flat and triangular muscle

OCUPA

• Located after the infraspinatus fossa and shoulder joint.

ORIGIN

• Infraspinous fossa medially to the ridge bordering surfaces insertion of round muscles.
• medial third of the infraspinatus fascia.
• fibrous septum that separates it from major and minor round.

INSERTION

• half a page of the greater tubercle.

INNERVATION : Nerve Suprascapular branch of the brachial plexus.

FUNCTION

• abductor and lateral rotator arm.
• Contact helps keep the shoulder joint surface. 

Ad