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Brachial artery

Muscular tunnel by pronator teres muscle for ulnar artery and median nerve in the lower arm
Figure1: Brachial artery (Ba) is divided into Radial (Ra) and Ulnar arteries (Ua) in the lower end of the arm itself. Then the Ulnar artery and the Median nerve (Mn) passes through a tunnel formed by the extensive additional humeral head of the pronator teres muscle (aHh-PT).  A fibromuscular tunnel formed by the humeral head of the Pronator teres was found arising from the medial intermuscular septum (M-IMS) and also from the fibrous arch form the shaft of the humerus to the medial intermuscula
Variations of axillary and brachial arteries
Figure 1: Dissection of the right axilla showing the variant common arterial trunk (CT) from axillary artery (AA – axillary artery; AV – axillary vein; STA – superior thoracic artery; TAA – thoracoacromial artery; PMJ – pectoralis major; PMI – pectoralis minor; SHB – short head of biceps; CB – coracobrachialis; MN – median nerve; UN – ulanar nerve; LSN – lower subscapular nerve; TDN – thoracodorsal nerve; SSA – subscapular artery; LTA – lateral thoracic artery).
Brachial artery and median nerve entrapment
Figure 1: Dissection of left upper limb showing the entrapment of brachial artery (BA) and median nerve (MN) within the brachialis muscle. (ME – medial epicondyle; RA – radial artery; UA – ulnar artery)
Unusual arterial branching patterns in right cubital fossa
Figure 2: Showing Brachial artery (BA) medial to biceps brachii muscle (BB), passing deep to median cubital vein (MCV) and superficial to bicipital aponeurosis (bap). The median nerve (MN) is seen medial to BA. The MN& the branches of BA are seen passing deep to pronator teres muscle (PM).