Arm and Cubital Fossa Anatomy (2024) PDF

The Arm Dr. Silvia Boyajian  The upper arm is enclosed in a sheath of deep fascia Two fascial septa, one on the medial side and one on the lateral side, extend from this sheath and are attached to the medial and lateral supracondylar ridges of the humerus By this means, the upp...

The Arm Dr. Silvia Boyajian  The upper arm is enclosed in a sheath of deep fascia Two fascial septa, one on the medial side and one on the lateral side, extend from this sheath and are attached to the medial and lateral supracondylar ridges of the humerus By this means, the upper arm is divided into two compartments: Anterior and a posterior fascial compartment, each of these compartments have its own muscles, nerves, and arteries. Contents of the Anterior Fascial Compartment of the Upper Arm ⑪ ⑳ ⑬ Muscles: Biceps brachii, coracobrachialis, and brachialis A radial Nerve Blood supply: Brachial artery Nerve supply to the muscles: Musculocutaneous nerve From lateral cord Structures passing through the compartment: Musculocutaneous, median, and ulnar nerves; brachial artery and basilic vein. The radial nerve is present in the lower part of the compartment try costeriors, dial No. [as. bees? s anteriorsecogen >155158 is compartment  / Muscles of the Anterior Fascial Compartment  aglenoid tubercle Biceps brachii One supra glenoid  Origin - lateral 8 Long head: Supraglenoid tubercle of scapula - Short head: Coracoid process of scapula  Insertion : Tuberosity of radius and bicipital aponeurosis into deep fascia of forearm laterally-  Nerve supply: Musculocutaneous nerve  Action: Supinator of forearm and flexor of elbow joint; weak flexor of shoulder joint shoulder 15 2525581sD;elbow + oint -I L weak Flexsion Suppination +Flexsion Coracobrachialis  Origin: Coracoid process of scapula  Insertion: Medial aspect of shaft of humerus  Nerve supply: Musculocutaneous nerve  Action: Flexes arm and also process of weak adductor Brachialis muscle  Origin: Front of lower half of humerus  Insertion: Coronoid process of ulna  Nerve supply Musculocutaneous nerve Radial nerve. a 6 95 mc; -  Action: Flexor of elbow joint Musculocutaneous Nerve lateral... The origin: from the lateral cord of the brachial plexus Lateral (C5, 6, and 7) in the axilla cord -> Motor It runs downward and laterally, pierces the coracobrachialis muscle Musculocutaneous N. I1 ,1S? Is If Bruchialiss, 5, coracobrachialis 1155 5 81. biceps s19S. and then passes downward between the biceps and =.? 34 > medial cutaneous nerve of the arm, a branch of the medial cord Medial side of the forearm >> medial cutaneous nerve of the forearm, a branch of the medial cord Lateral side of the arm >> upper lateral cutaneous nerve of the arm, a branch of the axillary nerve >> lower lateral cutaneous nerve of the arm, a branch of the radial nerve Lateral side of the forearm >> lateral cutaneous nerve of the forearm, a branch of the musculocutaneous nerve Posterior side of the arm >> posterior cutaneous nerve of the arm, a branch of the radial nerve Posterior side of the forearm >> posterior cutaneous nerve of the forearm, a branch of the radial nerve anterior. & & &posterior - 1. A The Cubital Fossa The Cubital Fossa The cubital fossa is a triangular depression that lies in front of ⑪ the elbow - -09 Medial, Interal si epicondyle Boundaries Laterally: The brachioradialis muscle Medially: The pronator teres muscle The base of the triangle: formed by an imaginary line drawn between the two epicondyles of the humerus A The roof is formed by skin and fascia and is reinforced by the The floor of the fossa is formed by the supinator muscle laterally and the brachialis bicipital aponeurosis. muscle medially Contents -15:1288 The cubital fossa contains the following structures, from the medial to the lateral side the median nerve the bifurcation of the brachial artery into the ulnar and radial arteries the tendon of the biceps muscle pulse sis.I the radial nerve and its deep branch.  The roof of the cubital fossa is formed by superficial fascia and skin. The most important structure within the roof is the median cubital vein, which passes diagonally across the roof. It connects the cephalic vein on the lateral side of the upper limb with the basilic vein on the medial side. --- Iv injection $1,19 is 115. The bicipital aponeurosis separates the median cubital vein from the brachial artery and median nerve. unsauloutaneous Other structures within the roof are cutaneous nerves-the medial cutaneous and lateral cutaneous ↳ nerves of the forearm. Drauch dis The supratrochlear lymph node lies in the superficial fascia over the upper part of the fossa, above the trochlea. It receives afferent lymph vessels from the third, fourth, and fifth fingers; the medial part of the hand; and the medial side of the forearm. The efferent lymph vessels pass up to the axilla and enter the lateral axillary group of nodes.  1555)555 The cubital fossa is the common site for sampling and transfusion of blood and intravenous injections because of the prominence and accessibility of veins. This vein lies directly on the deep fascia, running diagonally from the cephalic vein of the forearm to the basilic vein of the arm. It crosses the bicipital aponeurosis, which separates it from the underlying brachial artery and median nerve and provides some protection to the latter. A tourniquet is placed around the midarm to distend the veins in the cubital fossa. Once the vein is punctured, the tourniquet is removed so that when the needle is removed the vein will not bleed extensively. The median cubital vein is also a site for the introduction of cardiac catheters to secure blood samples from the great vessels and chambers of the heart. These veins may also be used for coronary angiography. & $5 Thank you Thank you