... it is impossible to coordinate the movements in your hands. Major Extrinsic Muscles To start a motion, the major extrinsic muscles must coordinate the movement. The anterior muscles, flexi carpi ulna
ris and the flexi carpi radialis flex the wrist, whereas the three posterior muscles, the extensor carpi radialis, extensor carpi radialis brevis and extensor carpi ulna
ris extend the wrist. You ...
Arteries of the Shoulder
... is located at the lower border of the teres major muscle, which is found just beneath the axillary artery. As it hits the elbow’s antecubital fossa, it starts to bifurcate into the radial and ulna
r arteries. In most people, this birfurcation appears below or above their elbows. How does it work? The brachial artery works by supplying freshly-oxygenated blood
to the cells located in the ...
Brachial Nerve Plexus
... creating the five major nerves
that serve the required coetaneous and muscular innervations for the upper extremities to function. The five most essential nerves of the upper extremities include the ulna
nerve, the radial nerve, the axillary nerve, the median nerve, and the musculo-coetaneous nerve. The posterior cord is the one responsible for yielding the axillary nerves which, in turn, ...
Upper Extremity Veins
... lot of deep and superficial veins. The deeper veins are located well below the skin surface, and they run alongside the arteries. The deep and superficial palms of the hands run into the radial and ulna
r veins, which are found on the arm. The brachial vein refers to the combination of the cubital fossa, the radial veins and the ulna
r veins. The medial side of the arm is where the veins basilica ...