While measuring blood pressure in upper arm, the chest piece of stethoscope is placed over which of the following arteries?

Option 3 : Brachial

Concept:-

• Brachial artery: it is a continuation of the axillary artery at the lower border of teres major muscle.
• Provides main arterial supply for the arm. Terminates opposite neck of the radius by dividing into radial and ulnar arteries.

Relations of the brachial artery:

Anteriorly: superficial in the upper part, overlapped laterally by coracobrachialis and biceps.

• Upper part; medial cutaneous nerve of forearm
• Middle part; median nerve
• Lower part; bicipital aponeurosis

Posteriorly: triceps, coracobrachialis, brachialis

Laterally:

• Upper part: median nerve, coracobrachialis, and biceps.
• Lower part: tendon of biceps.

Medially:

• Upper part: ulnar nerve, basilic vein.
• Lower part: median nerve.

• Ulnar artery: it is a terminal branch of the brachial artery, arising at the proximal aspect of the forearm.
• Radial artery: it is a blood vessel that supplies blood to the forearm (lower part of the arm) and hand.
• Axillary artery: it is the main artery of the upper extremity and originates as a continuation of the subclavian artery at the lateral margin of the first rib. 

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