Editing Arm (section)

===Blood supply===
[[File:Gray1235.png|thumb|Main arteries of the arm.]]
The main artery in the arm is the [[brachial artery]]. This artery is a big continuation of the [[axillary artery]]. The point at which the axillary becomes the brachial is distal to the lower border of teres major. The [[brachial artery]] gives off an unimportant branch, the [[deep artery of arm]]. This branching occurs just below the lower border of [[teres major]].

The brachial artery continues to the [[cubital fossa]] in the anterior compartment of the arm. It travels in a plane between the [[biceps]] and [[triceps]] muscles, the same as the [[median nerve]] and [[basilic vein]]. It is accompanied by [[venae comitantes]] (accompanying veins). It gives branches to the muscles of the anterior compartment. The artery is in between the [[median nerve]] and the tendon of the [[biceps brachii|biceps]] muscle in the [[cubital fossa]]. It then continues into the [[forearm]].

The deep artery of the arm travels through the [[lower triangular space]] with the [[radial nerve]]. From here onwards it has an intimate relationship with the radial nerve. They are both found deep to the triceps muscle and are located on the spiral groove of the [[humerus]]. Therefore, [[bone fracture|fracture]] of the bone may not only lead to lesion of the [[radial nerve]], but also [[haematoma]] of the internal structures of the arm. The artery then continues on to [[anastomosis|anastamose]] with the [[recurrent radial]] branch of the [[brachial artery]], providing a diffuse blood supply for the [[Elbow-joint|elbow joint]].