The primary arteries in the top (proximal) part of the forearm are the radial and ulnar arteries, originating from the brachial artery.
Here's a more detailed breakdown:
-
Brachial Artery Bifurcation: The journey starts in the upper arm with the brachial artery. This artery divides (bifurcates) in the cubital fossa (the area on the anterior side of the elbow) into the radial and ulnar arteries. This division usually occurs around the level of the radial neck or radial tuberosity.
-
Radial Artery: The radial artery travels down the radial (thumb) side of the forearm. It is one of the two major arteries providing blood to the forearm and hand. Clinically, the radial artery is important because its pulse can be easily palpated near the wrist.
-
Ulnar Artery: The ulnar artery travels down the ulnar (pinky finger) side of the forearm. Like the radial artery, it contributes to the blood supply of the forearm and hand.
-
Location - Important to Note: When referring to "the top" of the forearm, it's crucial to understand this refers to the proximal portion near the elbow where these arteries originate after the bifurcation of the brachial artery. They then run down the entire length of the forearm.
In summary, the radial and ulnar arteries are the main arterial blood vessels in the proximal forearm, stemming from the division of the brachial artery.
