Front and Back of Upperarm Anatomy PDF

FRONT AND BACK OF UPPERARM ARM Extends from shoulder to elbow. Divided into two compartments; anterior and posterior by medial and lateral intermuscular septa Anterior compartment contains muscles flex elbow joint. Posterior compartment contains muscles extend elbow joint. ANTERIOR COMPARTMENT...

FRONT AND BACK OF UPPERARM ARM Extends from shoulder to elbow. Divided into two compartments; anterior and posterior by medial and lateral intermuscular septa Anterior compartment contains muscles flex elbow joint. Posterior compartment contains muscles extend elbow joint. ANTERIOR COMPARTMENT ❖ Muscles: Biceps brachii Brachialis Coracobrachialis ❖ Blood Vessels: Brachial A. Brachial V. ❖ Nerve Supply: Musculocutaneous N.  MUSCLES ❖ Biceps: ❖ two heads and two sites of insertion. ❖ Coracobrachialis: ❖ from coracoid process to med. side of humerus. ❖ Brachialis: ❖ from ant. surface of humerus to ulnar tuberosity. ❖ N. supply: Musculocutaneous ❖ Action: elbow flexion, shoulder flexion (Coracobrachialis & Long head of biceps) BRACHIAL ARTERY Begins as a continuation of the axillary artery at the lower border of the teres major muscle. It terminates just distal to the elbow joint where it divides into the radial and ulnar arteries. It is palpable along its length. In proximal regions, the brachial artery can be compressed against the medial side of the humerus. BRACHIAL ARTERY Branches: 1) Muscular 2) Profunda brachii 3) Humeral nutrient 4) Sup. Ulnar collateral 5) Inf. Ulnar collateral 6) Terminal: Radial and Ulnar Two sets of veins in the arm: Superficial and Deep VEINS Superficial Veins are two: Basilic V.: at the distal part of arm runs medially then penetrates deep fascia to become med. to brachial A. It becomes the axillary V. at the lower border of the teres major muscle. Cephalic V.: passes superiorly on the anterolateral aspect of the arm and through the anterior wall of the axilla to reach the axillary vein. Deep Veins : are Paired brachial veins pass along the medial and lateral sides of the brachial artery, receiving tributaries that accompany branches of the artery It leaves the axilla and enters the MUSCULOCUTANEOUS arm by passing through the coracobrachialis muscle. NERVE It passes down the arm in the plane between the biceps brachii and brachialis muscles. After giving rise to motor branches in the arm continues as the lateral cutaneous nerve of forearm. The musculocutaneous nerve provides: 1- motor innervation to all muscles in the anterior compartment of the arm 2- sensory innervation to skin on the lateral surface of the forearm. ❖ Muscles: POSTERIOR COMPARTMENT Triceps (Three heads) ❖ Blood Vessels: Profunda brachii artery ❖ Nerve supply: Radial nerve THANK YOU VERY MUCH