In the antebrachial region, which artery supplies more blood to the hand?

The radial artery is primarily responsible for supplying blood to the lateral aspect of the hand, particularly the thumb and the index finger. As it travels down the forearm, it branches off to provide blood flow to the muscles and tissues in the antebrachial region and ultimately forms the deep palmar arch in the hand. This arch is crucial for providing blood supply to not just the intrinsic muscles of the hand but also to the digital arteries that supply the fingers.

While the ulnar artery also contributes to the blood supply of the hand by forming the superficial palmar arch, the radial artery's contribution is significant, especially in the context of the lateral side of the hand, where the majority of the blood supply is derived from it. The other arteries mentioned, such as the brachial and axillary arteries, primarily supply the arm and shoulder regions but do not have a direct and predominant role in the blood supply to the hand itself. Thus, the radial artery stands out as the primary artery that supplies more blood to the hand in the antebrachial region.