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In medicine, split hand syndrome is a neurological syndrome in which the hand muscles on the side of the thumb (lateral, thenar eminence) appear wasted, whereas the muscles on the side of the little finger (medial, hypothenar eminence) are spared.
Ectrodactyly, split hand, or cleft hand [1] (from Ancient Greek ἔκτρωμα (ektroma) 'miscarriage' and δάκτυλος (daktylos) 'finger') [2] involves the deficiency or absence of one or more central digits of the hand or foot and is also known as split hand/split foot malformation (SHFM). [3]
An open paper cut on the thumb. A paper cut occurs when a piece of paper or other thin, sharp material slices a person's skin, most often on the upper part of the index finger. Notably, "paper" cuts can also be caused by thin, stiff, and abrasive materials other than paper.
In contrast, in the posterior variant, tactile contact on the ventral surface of the palm and fingers is actively avoided through facilitation of extension of the fingers and withdrawal of the palm in a negative feedback loop (i.e. the stimulus, and even anticipation of stimulation of the palmar surface of the hand, generates movement of the ...
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The classification of ulnar polydactyly exists of either two or three types. The two-stage classification, according to Temtamy and McKusick, involves type A and B. In type A there is an extra little finger at the metacarpophalangeal joint, or more proximal including the carpometacarpal joint. The little finger can be hypoplastic or fully ...
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