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Table of Contents:-

NEET PG Anatomy NOTES|Upper limb|Part 2

Cutaneous Nerve,Superficial Veins ,and Lymphatics

Topics-

1.Cutaneous Nerves of the Upper limb

2.Superficial Veins of the upper limb

3.Superficial lymphatics of upper limb

 

1.Cutaneous Nerves of the Upper limb

A. Supraclavicular Nerve

■ Arises from the cervical plexus (C3, C4) and innervates the skin over the upper pectoral, deltoid, and outer trapezius areas.

B. Medial Brachial Cutaneous Nerve

■ Arises from the medial cord of the brachial plexus and innervates the medial side of the arm.

C. Medial Antebrachial Cutaneous Nerve

■ Arises from the medial cord of the brachial plexus and innervates the medial side of the forearm.

D. Lateral Brachial Cutaneous Nerve

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Fig.No. 1 Cutaneous nerves of the upper limb (anterior and posterior views)

■ Arises from the axillary nerve and innervates the lateral side of the arm

E. Lateral Antebrachial Cutaneous Nerve

■ Arises from the musculocutaneous nerve and innervates the lateral side of the forearm.

F. Posterior Brachial and Antebrachial Cutaneous Nerves

■ Arise from the radial nerve and innervate the posterior sides of the arm and forearm, respectively.

G. Intercostobrachial Nerve

■ Is the lateral cutaneous branch of the second intercostal nerve emerging from the second intercostal space and may communicate with the medial brachial cutaneous nerve.

2.Superficial Veins of the upper limb

A. Cephalic Vein

■ Begins as a radial continuation of the dorsal venous network, runs on the lateral side, and is often connected with the basilic vein by the median cubital vein in front of the elbow.

■ Ascends along the lateral surface of the biceps, pierces the brachial fascia, and lies in the deltopectoral triangle with the deltoid branch of the thoracoacromial trunk.

■ Pierces the costocoracoid membrane of the clavipectoral fascia and ends in the axillary vein.

B. Basilic Vein

■ Arises from the dorsal venous arch of the hand and accompanies the medial antebrachial cutaneous nerve along the ulnar border of the forearm and passes anterior to the medial epicondyle.

■ Pierces the deep fascia of the arm and joins the brachial veins (the venae comitantes of the brachial artery) to form the axillary vein at the lower border of the teres major muscle.

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Fig.No. 2 Venous drainage of the upper limb

C. Median Cubital Vein

■ Connects the cephalic vein to the basilic vein over the cubital fossa.

■ Lies superficial to the bicipital aponeurosis, and thus separates it from the brachial artery, which is vulnerable to being punctured during intravenous injections and blood transfusions. The median nerve on the medial side of the artery is also vulnerable to an incorrectly placed needle.

D. Median Antebrachial Vein

■ Arises in the palmar venous network, ascends on the front of the forearm, and terminates in the median cubital or the basilic vein.

E. Dorsal Venous Network

■ Is a network of veins formed by the dorsal metacarpal veins that receive dorsal digital veins and continues proximally as the cephalic vein and the basilic vein.

3.Superficial lymphatics of upper limb

A. Lymphatics of the Finger

■ Drain into the plexuses on the dorsum and palm of the hand, which form the medial and lateral lymph vessels.

B. Medial Group of Lymphatic Vessels

■ Accompanies the basilic vein; passes through the cubital or supratrochlear nodes; and ascends to enter the lateral axillary nodes, which drain first into the central axillary nodes and then into the apical axillary nodes.

C. Lateral Group of Lymphatic Vessels

■ Accompanies the cephalic vein and drains into the lateral axillary nodes and also into the deltopectoral (infraclavicular) node, which then drain into the apical nodes.

D. Axillary Lymph Nodes

■ Lie in the axilla

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Click here to Read more:-  NEET PG Anatomy Notes |UPPER LIMB|Part 1