The pulse behind the medial malleolus in the ankle is which of the following?

The pulse behind the medial malleolus in the ankle is referred to as the posterior tibial pulse. This pulse is palpated by locating the posterior tibial artery, which runs behind the medial malleolus, a bony prominence on the inner side of the ankle. The posterior tibial artery is a continuation of the popliteal artery and is responsible for supplying blood to the posterior compartment of the leg and the plantar aspect of the foot.

Understanding the anatomy of the lower limb is crucial for identifying pulses accurately. The dorsalis pedis pulse, on the other hand, is located on the dorsum (top) of the foot and is associated with the anterior tibial artery. The ulnar and radial pulses are related to the arteries in the forearm and wrist, respectively, and are not involved in the vascular supply of the ankle.

Thus, the posterior tibial pulse is the correct answer because it is anatomically positioned behind the medial malleolus, making it a key site for assessing circulation in the lower extremities.