Abstract
Pinch gripping is an evolved hominid attribute: the modification of the first carpo-metacarpal
articulation into a sellar type enables an opposable thumb; The pinch, preferentially
performed by approximation of the pollex-index fingertip pulps shows variation in
range of purchase between these digits depending on the power of grip. This brief
report analyzes the area of surface contact between the pollex and index tip in both,
light and tight pinch-grip.
The possible role of index anatomy in enhancing the level of efficiency of pinch-grip
in opposition is discussed.
Keywords
opposition - index - pollex - pinch grip - purchase area - pulp
