Which acupoint is positioned 1/2 cun anterior to the upper border of the root of the ear?

The acupoint located 1/2 cun anterior to the upper border of the root of the ear is SJ-22, also known as "Song Lake." This point is situated in the temporal region, specifically at the upper border of the temporal bone and near the hairline. By understanding its specific anatomical location in relation to the ear, one can accurately identify SJ-22.

This acupoint is significant in the practice of acupuncture as it is used for conditions related to ear issues, headaches, and neck pain, among other indications. The anatomical landmarks are very important when locating acupoints to ensure effective treatment and avoid any complications during needling.

The other options, while they represent specific acupuncture points, do not fit the description provided in the question. For instance, SJ-17 is located just below the earlobe, GB-1 is located at the outer canthus of the eye, and GB-30 is positioned on the buttock. None of these points correlate with the specified location of being 1/2 cun anterior to the upper border of the root of the ear, highlighting that SJ-22 is indeed the correct answer.