![]() A reduction in thumb length, seen in an individual whose distal thumb phalanx has been amputated, limits the ability to fully rotate the thumb to the index pad. 24 The comparative length of the index finger to the thumb is a major factor when attempting opposition or pad-to-pad contact. The thumb, because of its unique ability to oppose, is a common feature in most grip classifications, contributing 40% to 70% of total hand function. Opposition involves rotation at the carpometacarpal joint of the thumb to place the thumb pad diametrically opposite to the pad of one or all of the other digits (see Figure 14-4). ![]() ![]() Cech DHS, PT, PCS, Suzanne “Tink” Martin MACT, PT, in Functional Movement Development Across the Life Span (Third Edition), 2012 Significance of Thumb OppositionĪlthough prehension is evident in many forms of animal life, it attains maximum function in humans given the addition of thumb opposition.
0 Comments
Leave a Reply. |