What Is the Antecubital Fossa?
The antecubital fossa is a small cavity in the elbow joint. This triangular cavity is important to lab technicians because three main veins run through it. All are viable sources for blood samples and are easily accessible through the skin of the inner elbow. This is why many blood draws are performed at this site. The median nerve, which senses stimuli all along the arm, and the brachial artery, which carries blood into the arm and hand, also pass through the antecubital fossa. In addition, a tendon of the biceps, which helps the biceps muscles expand and contract, runs through this important cavity.
