On the back side, when the 2nd, 3 between the metacarpals and the 4th, 5 metacarpal bones, when at the midpoint of the wrist and metacarpophalangeal joints perpendicular to the grain side caves
In the back side, when between the first and second metacarpal 2,3 4,5 metacarpal, when the wrist and metacarpophalangeal joint stripes at the midpoint of one side two points
In the dorsum of the hand, when second, 3, 5 and 4 metacarpal between wrist and metacarpal, when the metacarpophalangeal joint at the midpoint of the two points, one side