Where is the brachial plexus formed?

Maniubrium of sternum

Clavicle enables _______for deeps inspiration

_________ is a thick projecting ridge of bone that continues laterally to form acromion process

Humerus articulates with

Movements of the SC joint

Abduction, adduction, flexion, extension, circumduction, and rotation

Suprascapular, humeral circumflex, and scapular circumflex arteries

To keep the head of the humerous down into the glenoid cavity

Form lubricating mechanism between rotator cuff and coracromial arch during shoulder joint movement

Teres minor and subscapularis muscle(Superiorly)

                Teres major (inferiorly)

long head of the triceps (medially)

Teres minor,  teres major, long head triceps

Supraspinatus and infraspinatus muscles; shoulder and AC joint

Brachial plexus consists of

Supraclavicular, medial brachial cutaneous, medial antebrachial cutaneous, lateral brachial cutaneous, lateral antebrachial cutaneous, posterior brachial, antebrachial cutaneous, intercostal brachial

Pectoralis major, pectoralis minor, subclavius, serratus anterior

O: clavicle, acromion, scapular spine

                I: Deltoid tuberosity, halfway down humerus

                A: abductor, flexion, and extension of the humerus

O: Upper two thirds of the lateral border of the scapula

                I: Lowermost of the three facets of the greater tuberosity of the humerus

                A: adductor and lateral rotator of the humerus, main action is as a member of RTC

O: Infraspinous fossa of the scapula

                I: Middle facet of the greater tuberosity of the humerus

                A: Lateral rotator of the humerus

O: Medial two thirds of the costal surface of scapula

                I: Lesser tuberosity, shoulder joint capsule, the front upper shaft of the humerus

                A: adductor, medial rotator of the humerus