Arm

• head
• great tubercle
• lesser tubercle

• half pheroid
• faces medially upward and backward
• articulates with concave glenoid cavity of scap

• slight constriction at margin of head
• capsule of shoulder join is attached except medially when it descends on shaft

• project forward
• insertion for subscapularis

• laterally beyond the acromion and covered by deltoid
• responsible for roundness of shoulder
• insetion for supraspinatus, infraspinautes, and teres minor`

insertion of teres major

insertion for pectoralis major

• separates crests
• contains long head of biceps tendon
• latissimus dorsi inserts into the floor

stretches across the groove over the bicep tendon

cylindrical in upper half, triangular below

• a tapering region where upper end joins the shaft
• area of fracture
• medially is the posterior humeral circumflex artery and axillary nerve

insertion of deltoid

• behind th tuberosity
• crosses the bone obliquely, passing downwards, laterally and forwards

forms elbow joint with the radius and ulna

• lateral
• rounded capitulum (little head) articulates with the head of the radius

• Medial
• pulley-like trochlea articulates with the trochlear notch of the ulna

• medial and lateral epicondyles,
• olecranon, coronoid and radial fossae

• subcutaneous
• more prominent
• superficial group of forearm flexor muscles arise from anterior surface

• ulnar nerve passes through the shallow groove behind the medial epicondyle
• "funny bone"

superficial group of forearm extensor muscles arise from anterior and lateral surfaces

attachment to the medial and lateral intermuscular sept

• posterior to the trochlea
• flarge triangular fossa for the olecranon of the ulna when elbow is extended

• anterior of trochlea and smaller the olecranon
• for coronoid process of the ulna during flexion of the elbow

• directly above the capitulum anteriorly
• for the head of the radius in full flexion of elbow

• laterally by the brachioradialis
• medially by the pronator teres

• Deep fascia reinforced by the bicipital aponeosis
• superficial are the lateral and medial cutaneous nerves of the forearm and cephalic basilic and median cubital vein

• (MED--> LAT)
• median nerve, brachial artery and 2 branches, biceps tendon and radial nerve deep to the brachioradialis

brachialis

• C6-8 T1 (sometimes C5)
• arises by two roots from the medial and lateral cords
• 2 roots unit in axilla, lateral to axillary artery
• crosses the brachial artery
• medial to it in the cubital fossa
• no branch to arm

• C8-T1 (sometimes C7)
• largest branch of medial cord
• medial to brachial artery as far as middle of the arm where it passes behin the medial intermuscular septum into poster compartment
• passes ulnar groove behind the medial epicondyle
• no branch to arm

• pieces coracobrachialis, continues between biceps and brachialis, inervating them all
• emerges at the lateral margin of th biceps above the elbow as the lateral cutaneous nerve of the forearm

• (C5-8, T1)
• largest branch of posterior cord
• lies between the long head of triceps and humerus
• then in the radial groove between the origins of the lateral and medial heads next to profunda brachii artery
• enters the ANT compartment and passes between brachialis and brachioradialis in front of LAT epicondly
• divides into superficial and deep branches to forearm
• supplies triceps and anconeus

• direct continuation of the axillary artery
• from lower border of the teres major to 1 inch below the crease of the elbow
• first medial to humeru then crosses in front

• brachial artery is superficial for it
• BP cuff applied near mid-arm and pulse sounds are listened for in cubital fossa

• profunda brachii
• unnamed branches to biceps, brachialis coracobrachialis
• superior and inferior ulnar collateral arteries --> anastomose around the medial epicondly with branches of the ulnar artery
• terminal branches - ulnar and radial artery