Muscle of Pectoral Region

 MUSCLE OF PECTORAL REGION 

Muscle of Pectoral Region


=> Pectoral is upper chest region. There are three muscle in Pectoral Region.

1) Pectoral major
2) Pectoral minor
3) Subclavian

Superficial Muscle of Anterior Chest and Arm
Superficial Muscle of Anterior Chest and Arm (left side)

Deep Muscle of Anterior Chest and Arm
Deep Muscle of Anterior Chest and Arm (left side)


PECTORALIS MAJOR :-


ORIGIN :-
sternal half of the clavicle, Upper half of sternum, aponeurosis of external oblique muscle


INSERTION :- lateral lip of intertubercular sulcus

ACTIONS :- adduction, medial rotation and flexion of the shoulder


NERVE SUPPLY :- Medial & Lateral Pectoral Nerve.


PECTORAL MINOR :- 


ORIGIN:- costocondral junction of 3rd, 4th ,5th ribs


INSERTION: corocoid process medial &upper surface


ACTIONS: draws the scapula forwards, depression of the shoulder.


NERVE SUPPLY :- Medial & Lateral
Pectoral Nerve (C5-8,T1)


SUBCLAVIUS


ORIGIN: 1st rib at the costochondral junction.


INSERTION: subclavian groove of the clavicle


ACTION: steadies the clavicle


NERVE SUPPLY: Nerve to Subclavius from
upper trunk of Brachial plexus
(C5,C6)

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