one cm lateral to the occipital protuberance at the base of the skull. Alternately, a point at least 3 cm behind the ear. C3 – In the supraclavicular fossa, at the midclavicular line. C4 – Over the acromioclavicular joint. C5 – On the lateral (radial) side of the antecubital fossa, just proximally to the elbow. C6 – On the dorsal surface of the proximal phalanx of the thumb. C7 – On the dorsal surface of the proximal phalanx of the middle finger. C8 – On the dorsal surface of the proximal phalanx of the little finger. T1 – On the medial (ulnar) side of the antecubital fossa, just distal to the medial epicondyle of the humerus. T2 – At the apex of the axilla. T3 – Intersection of the midclavicular line and the third intercostal space T4 – Intersection of the midclavicular line and the fourth intercostal space, located at the level of the nipples. T5 – Intersection of the midclavicular line and the fifth intercostal space, horizontally located midway between the level of the nipples and the level of the xiphoid process. T6 – Intersection of the midclavicular line and the horizontal level of the xiphoid process. T7 – Intersection of the midclavicular line and the horizontal level at one quarter the distance between the level of the xiphoid process and the level of the umbilicus. T8 – Intersection of the midclavicular line and the horizontal level at one half the distance between the level of the xiphoid process and the level of the umbilicus. T9 – Intersection of the midclavicular line and the horizontal level at three quarters of the distance between the level of the xiphoid process and the level of the umbilicus. T10 – Intersection of the midclavicular line, at the horizontal level of the umbilicus. T11 – Intersection of the midclavicular line, at the horizontal level midway between the level of the umbilicus and the inguinal ligament. T12 – Intersection of the midclavicular line and the midpoint of the inguinal ligament. L1 – Midway between the key sensory points for T12 and L2. L2 – On the anterior medial thigh, at the midpoint of a line connecting the midpoint of the inguinal ligament and the medial epicondyle of the femur. L3 – At the medial epicondyle of the femur. L4 – Over the medial malleolus. L5 – On the dorsum of the foot at the