ANAT 201 ARM PDF

ANAT 201 ARM By Mrs. Mustapha Maryam Gilima INTRODUCTION The arm entails the area between the shoulder and elbow. Flexion-Extention and Pronation-Supination occur between arm and forearm at the elbow joint.  BONE;HUMERUS Proximal end of humerus Head Surgical neck Anatomical nec...

ANAT 201 ARM By Mrs. Mustapha Maryam Gilima INTRODUCTION The arm entails the area between the shoulder and elbow. Flexion-Extention and Pronation-Supination occur between arm and forearm at the elbow joint.  BONE;HUMERUS Proximal end of humerus Head Surgical neck Anatomical neck Greater and Lesser Tubercules Intertuberculer Sulcus Shaft of humerus Deltoid tuberosity Radial groove Medial and Lateral supraepicondylar ridges Distal end of humerus Trochlea Capitulum Medial Epicondyle Lateral Epicondyle Radial Fossa Coronoid Fossa Olecranon Fossa  MUSCLES OF THE ARM Muscles of the arm are divided into two compartments; Anterior(flexor) compartment innervated by Musculocutaneous nerve; Brachialis Coracobrachialis Bicepsbrachii Posterior(extensor) compartment innervated by Radial nerve; Triceps brachii Anconeus Muscles of the arm Table for origin, insertion and function Arteries and Veins of the Arm Arteries Brachial Artery; -Main arterial supply of the arm which begins at the inferior border of teres major as a continuation of axillary artery and ends by dividing into ulnar and radial arteris in the cubital fossa. -It is palpable throughout its course as it lies anterior to the triceps and brachialis and pulsations can be palpated at the medial bicipital groove. -It accompanies the median nerve as it passes anterolaterally. -It gives off the humeral nutrient artery and other unnamed muscular branches laterally. -Medially,the profunda brachii artery and the superior and inferior ulnar collateral arteries are the main branches Profunda brachii artery -It’s the largest branch of brachial artery and accompanies the radial nerve along the radial groove. -It terminate by dividing into middle and radial collateral arteries. Humeral nutrient artery -Enters the nutrient canal in the anteromedial surface of the arm. Superior ulnar collateral artery -Accompanies ulnar nerve posterior to medial epicondyle of the humerus Inferior ulnar collateral artery -It passes inferomedially anterior to medial epicondyle of the humerus. Arteries of the arm Veins There are the superficial and deep veins. Superficial veins originate on the dorsum of the hand from dorsal venous network. They are; Cephalic vein;It ascend from the lateral aspect of the dorsal venous network,proceeding alng the lateral border of the wrist and anterolateral surface of the arm.It communicates with median cubital vein anterior to the elbow.It courses superiorly along deltopectoral groove into clavipectoral triangle.It joins the terminal axillary vein. Basilic vein;Ascends from the medial part of dorsal venous network.It pierces the brachial fascia running superiorly parallel to brachial artery and median cutaneous nerve of forearm to the axilla joining the accompanying veins of axillary artery to form axillary vein. Deep veins usually accompany arteries that bear same name Brachial vein begins at the elbow by union of accompanying veins of ulnar and radial arteries and by merging with basilic vein it forms axillary vein Veins of the arm Nerves of the arm Musculocutaneous nerve Radial nerve Median nerve Ulnar nerve THANK YOU.