01898nas a2200301   4500000000100000008004100001260001300042653001500055653001000070653002800080653001100108653001700119653001200136653001100148653001200159653000900171653001500180653002300195653001300218653001200231653001400243100001700257245011500274300001100389490000700400520117500407022001401582       1976                            d  c1976 Sep10aAdolescent10aAdult10aBiomechanical Phenomena10aFemale10aFinger Joint10aFingers10aHumans10aleprosy10aMale10aMetacarpus10aModels, Biological10aMovement10aMuscles10aParalysis1 aSrinivasan H00aPatterns of movement of totally intrinsic-minus fingers based on a study of one hundred and forty-one fingers.  a777-850 v583 a<p>A detailed study of metacarpophalangeal flexion and interphalangeal extension movements of 141 fingers with complete intrinsic-muscle paralysis due to leprosy showed that long flexors and long extensors produce movement at the metacarpophalangeal and proximal interphalangeal joints simultaneously, and not successively as is generally believed. The amounts of flexion resulting from long flexor activity are almost equal at the two joints and metacarpophalangeal flexion is achieved without excessive flexion of the proximal interphalangeal joint, but this is masked by the claw-finger deformity. The movement resulting from activity of the long extensor is complex and there are three or more qualitatively different patterns of extension. Although the long extensor produces simultaneous extension at the metacarpophalangeal and proximal interphalangeal joints, the latter consistently lags behind the former so that full extension is not achieved at the proximal interphalangeal joint even when the metacarpophalangeal joint is maximally extended. The diverse patterns of extension are not related to duration of degree of clawing or to any particular finger.</p>  a0021-9355