Pectoralis Major

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Pectoralis Major mm    Pectoralis Major: Origin and InsertionPectoralis Major

Origin: Medial 1/2 of the clavicle
, Costal cartilages of the first 6 ribs
Sternum

Insertion: Intertubercular groove (between the greater and lesser tubercles) of the humerus

Actions: Shoulder flexion. 
Internal rotation
. Adduction

Innervation: Lateral and medial pectoral nerves

Daily uses: Using roll-on deodorant


Back to muscles

Other muscles…..

Infraspinatus

Origin: Posterior surface of the scapula (below the spine of the scapula)
.

Insertion: Greater tuberosity on the humerus
.

Actions: Shoulder abduction, 
External rotation.

Innervation: Suprascapular nerve
.

Daily uses: Brushing hair.

Teres Minor

Origin: Mid section of the lateral border of the scapula

Insertion: Greater tuberosity on the humerus

Actions:External rotation, 
Shoulder adduction

Innervation: Axillary nerve

Daily uses: Brushing hair

Supraspinatus

Origin: Supraspinous fossa

Insertion: Greater tuberosity of the humerus

Actions: Abduction 
Stabilisation of the humerus

Innervation: Suprascapular nerve

Daily uses: Holding shopping bags away from the body

How do you stretch subscapularis and pectoralis major?

You should not complete this stretch if you have any shoulder problems. Speak to your physio who can advise you further.

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