entes ▁may ▁have ▁their ▁origin ▁either ▁on ▁the ▁car pus ▁or ▁the ▁met ac arp us , ▁which ▁suggests ▁that ▁the ▁pal mar ▁inter os se i ▁mus cles ▁also ▁contain ▁elements ▁of ▁the ▁contra h entes . ▁ ▁They ▁appear ▁in ▁the ▁human ▁fet us ▁as ▁a ▁layer ▁of ▁flesh ▁which ▁mostly ▁disapp ears . ▁ ▁In ▁other ▁animals ▁The ▁contra hens ▁of ▁the ▁fourth ▁digit ▁is ▁absent ▁in ▁dogs ▁but ▁present ▁in ▁c ats ▁and ▁rabb its . ▁ ▁In ▁prim ates , ▁the ▁contra h entes ▁vary ▁in ▁number ▁between ▁zero ▁and ▁four . ▁By ▁their ▁insert ion ▁onto ▁the ▁proxim al ▁ph al anges ▁they ▁facil itate ▁convergence ▁of ▁the ▁digits . ▁ ▁In ▁tar si ers , ▁they ▁facil itate ▁the ▁g rip ▁by ▁increasing ▁the ▁pressure ▁between ▁the ▁large ▁dist al ▁p ads ▁and ▁the ▁g ri pped ▁surface ▁by ▁simultaneously ▁flex ing ▁the ▁met ac arp oph al ange al ▁joint s ▁and ▁the ▁proxim al ▁inter phal ange al ▁joint s ▁and ▁extending ▁the ▁dist al ▁inter phal ange al ▁joint s . ▁ ▁Notes ▁ ▁References ▁▁▁▁▁▁▁▁▁▁ ▁Category : Mus cles ▁of ▁the ▁upper ▁lim b ▁Category : Hand ▁Category : Mus cles ▁of ▁the ▁lower ▁lim b ▁Category : Foot <0x0A> </s> ▁Char ny - Or ée - de - P uis aye ▁is ▁a ▁commune ▁in ▁the ▁Y onne ▁department ▁of ▁central ▁France . ▁The ▁municipality ▁was ▁established ▁on ▁ 1 ▁January ▁ 2 0 1 6 ▁by ▁mer ger ▁of ▁the