Supraspinatus Muscle: Origin, Insertion, Nerve Supply & Action

Supraspinatus Muscle: The supraspinatus is a relatively small muscle of the upper back that runs from supraspinous fossa superior portion of the scapula to the more preponderant tubercle of the humerus. It is one of the four rotator cuff muscles.

Attachments of the supraspinatus muscle

Origin:
Supraspinous fossa of the scapula.

Insertion:
The superior aspect of greater tubercle of the humerus.

Actions of the supraspinatus muscle
Abduction
Internal Rotation
External Rotation
Stabilization

Nerve supply of the supraspinatus muscle

Suprascapular nerve

Nerve roots: C5 and C6.

Upper Extremity Muscle Atlas

• Abductor Pollicis Longus
• Abductor Digiti Minimi
• Abductor Pollicis Brevis
• Adductor Pollicis
• Anconeus
• Biceps Brachii
• Brachioradialis
• Brachialis
• Coracobrachialis
• Deltoid
• Extensor Carpi Radialis Longus
• Extensor Carpi Radialis Brevis
• Extensor Carpi Ulnaris
• Extensor Digitorum
• Extensor Digiti Minimi
• Extensor Indicis
• Extensor Pollicis Longus
• Extensor Pollicis Brevis
• Flexor Carpi Radialis
• Flexor Carpi Ulnaris
• Flexor Digitorum Profundus
• Flexor Digitorum Superficialis
• Flexor Digiti Minimi Brevis
• Flexor Pollicis Brevis
• Flexor Pollicis Longus
• Infraspinatus
• Interosseous Muscles, Dorsal
• Interosseous Muscles, Palmar
• Levator Scapulae
• Latissimus Dorsi
• Opponens Digiti Minimi
• Opponens Pollicis
• Pectoralis Major
• Pectoralis Minor
• Palmaris Longus
• Pronator Quadratus
• Pronator Teres
• Rhomboid Major and Minor
• Subscapularis
• Supinator
• Serratus Anterior
• Supraspinatus
• Trapezius
• Triceps Brachii
• Teres Major
• Teres Minor