01492nas a2200277   4500000000100000008004100001260001300042653001000055653001700065653001100082653001200093653000900105653003000114653001400144653003900158653001000197653001600207100001300223700001200236245004700248300001000295490000700305050003200312520085600344022001401200       1981                            d  c1981 Apr10aAdult10aFinger Joint10aHumans10aleprosy10aMale10aMetacarpophalangeal Joint10aParalysis10aPeripheral Nervous System Diseases10aThumb10aUlnar nerve1 aPalande 1 aGilbie 00aThe deformity of thumb in ulnar paralysis.  a152-90 v53  aInfolep Library - available3 a<p>The flexion/extension angles at the Metacarpophalangeal and Interphalangeal joints of the thumb in position of rest and pinch were studied in 68 thumbs of ulnar paralysis. In two thumbs the flexor pollicis brevis was not paralysed. Twenty five normal thumbs were used as controls for comparison. During the resting position the metacarpophalangeal joints showed less flexion and interphalangeal joints more flexion than normal. During the pinch position metacarpophalangeal hyperextension and interphalangeal flexion -- the Z deformity was seen in about 60% while marked interphalangeal flexion was seen in all thumbs of ulnar paralysis. It is suggested that this muscular imbalance is likely to affect thumb joints in time because of abnormal stresses due to altered forces and this can be prevented by restoring the muscle balance by surgery.</p>  a0024-1024