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Infraspinatus Muscle




Muscle Energy Stretching Technique - Infraspinatus


The infraspinatus muscle is member of the rotator cuff group, which comprises the supraspinatus, infraspinatus, teres minor, and subscapularis

The rotator cuff helps hold the head of the humerus in contact with the glenoid cavity (fossa, socket) of the scapula during movements of the shoulder, thus helping to prevent dislocation of the joint.


Infraspinatus Trigger Points



Infraspinous fossa of scapula.


Middle facet on greater tubercle of humerus. Capsule of shoulder joint.


As a rotator cuff muscle, helps prevent posterior dislocation of shoulder joint. Laterally rotates humerus.

Antagonists: subscapularis, pectoralis major, latissimus dorsi.


Suprascapular nerve, C(4), 5, 6, from upper trunk of brachial plexus.


Example: brushing hair back.


Middle/upper cervical spine: deep anterior shoulder joint zone of
3–4 cm in region of long head of biceps brachii, radiating into biceps belly then into forearm—diffuse symptoms in median nerve distribution.

Medial/scapula: to medial border of scapula.



Infraspinatus Trigger Point Referred Pain




Decreased range of motion in Apley scratch test (behind back), hemiplegia, rotator cuff tendinopathy, frozen shoulder syndrome, pain in back and front of shoulder, night-time shoulder pain when sleeping on same/ opposite side, dead-arm sensations, pain undoing bra, shoulder girdle fatigue, weakness of grip, loss of arm strength, changes in sweating (usually increased), “mouse arm” from computer mouse overuse.


Overuse activities with arm unsupported (e.g. computer mouse, driving, tennis, weight training, water sports, ski poles), pulling objects behind body, sudden trauma from fall on outstretched arm/ catching yourself when trying to stop a fall, prolonged holding of heavy objects.


Biceps tendonitis. C5–C6 neuropathy. Suprascapular nerve dysfunction.


Infraspinatus, subscapularis, levator scapulae, pectoralis minor/major, long head biceps brachii, biceps brachii, anterior deltoid, teres major, latissimus dorsi, rotator cuff issues, biceps tendonitis.






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