Deep palmar arch, TRUE is
**Core Concept**
The deep palmar arch is a vital arterial structure located in the palm of the hand, supplying blood to the thumb, index, and middle fingers. It is formed by the radial artery and the deep palmar branch of the ulnar artery. The deep palmar arch is an important anastomotic channel, providing a collateral circulation between the radial and ulnar arteries.
**Why the Correct Answer is Right**
The deep palmar arch is a significant arterial structure that provides blood supply to the thumb, index, and middle fingers. This arch is formed by the radial artery and the deep palmar branch of the ulnar artery, which anastomose to form a continuous channel. The deep palmar arch is crucial for maintaining blood flow to the hand in case of obstruction or injury to one of the major arteries.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is not related to the deep palmar arch.
* **Option B:** This option is incorrect because the superficial palmar arch is a separate arterial structure located superficial to the deep palmar arch, and it is primarily supplied by the ulnar artery.
* **Option D:** This option is incorrect because the superficial palmar arch is not located in the same plane as the deep palmar arch and is not directly related to its formation.
**Clinical Pearl / High-Yield Fact**
The deep palmar arch is often injured in cases of radial artery cannulation, leading to ischemia of the thumb and index finger.
**Correct Answer: C. The deep palmar arch is formed by the radial artery and the deep palmar branch of the ulnar artery.**