Which extra point is located on the palmar aspect of the forearm, midway between the wrist and elbow creases?

The correct answer is bi zhong, which is indeed located on the palmar aspect of the forearm, approximately midway between the wrist and elbow creases. This point is classified as an extra point in Traditional Chinese Medicine (TCM) and is often used for its therapeutic effects in treating various conditions such as pain and dysfunction in the forearm and hand.

Understanding the location and function of bi zhong helps practitioners effectively utilize it in clinical practice. The point is particularly valued for its role in alleviating symptoms in the upper limb by harmonizing Qi and blood flow in that region, reflecting the principles of TCM in addressing musculoskeletal issues.

The other points described are located elsewhere: er bai is typically found on the anterior aspect of the forearm but is not exactly midway between the elbow and wrist; wai lao gong is located closer to the wrist and is associated with the pericardium channel; while zhong kui is situated on the center of the palm and has different clinical applications. Each of these points has its significance, but bi zhong specifically aligns with the anatomical description given in the question.