This information has been displayed with the kind permission of SportsInjuryClinic and Get Body Smart who can be found at the links below:
Origin: Posterior aspect of Xiphoid process and sternum.
Insertion: Posterior surface of costal cartilages of ribs 2-6.
Actions: Pulls costal cartilages downwards to help with forces exhalation.
Innervation: Corresponding costal nerves.
Daily uses: Forceful exhalation.
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.
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
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.