Head Yuan Shi Dian Location: As shown by the red lines in the  diagram, it is divided into two sections: Yuan Shi Dian behind the ear  and Yuan Shi Dian on the lower edge of the occipital bone. The former  is primary and the latter secondary. Yuan Shi Dian behind the ear is  behind the earlobe at the suture between the mastoid bone and the  mandible, about half the length of the index finger, and with being close  to the back of the ear as the starting point. Yuan Shi Dian on the lower  edge of the occipital bone is at the area where the occipital bone meets  with the neck, starting from the concave area where the mastoid bone  joins with the lower edge of the occipital bone. It is close to and along  the lower edge of the occipital bone, extending to the large tendon  beside the cervical spine of the upper neck area on the same side.

Coverage: All of the head and twitching or hemiplegia of the four  limbs, as shown in the ORANGE area marked in the diagram.

Neck Yuan Shi Dian Location: As shown by the red lines in the  diagram, it is divided into horizontal and vertical sections. The  horizontal section is part of the Head Yuan Shi Dian, which is Yuan  Shi Dian on the lower edge of the occipital bone. The vertical section is  located on both sides of the cervical vertebrae, starting from the highest  point of the large tendon beside the cervical spine at the lower edge of the  occipital bone (within the hairline), continuing vertically down along the  tendon, and ending at the junction between the neck and the shoulder.

Coverage: The neck and the shoulder down to the collarbone, as shown  in the YELLOW area marked in the diagram.