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A claw is a curved, pointed appendage found at the end of a toe or finger in most amniotes (mammals, reptiles, birds). Some invertebrates such as beetles and spiders have somewhat similar fine, hooked structures at the end of the leg or tarsus for gripping a surface as they walk.
A grooming claw (or toilet claw) is the specialized claw or nail on the foot of certain primates, used for personal grooming. All prosimians have a grooming claw, but the digit that is specialized in this manner varies. [1] Tarsiers have a grooming claw on second and third toes. In the suborder Strepsirrhini, which includes lemurs, galagos and ...
Mallet toe is a similar condition affecting the distal interphalangeal joint. [2] Claw toe is another similar condition, with dorsiflexion of the proximal phalanx on the lesser metatarsophalangeal joint, combined with flexion of both the proximal and distal interphalangeal joints. Claw toe can affect the second, third, fourth, or fifth toes.
A dewclaw is a digit – vestigial in some animals – on the foot of many mammals, birds, and reptiles (including some extinct orders, like certain theropods). It commonly grows higher on the leg than the rest of the foot, such that in digitigrade or unguligrade species, it does not make contact with the ground when the animal is standing.
[3] [4] Some of the lower bones of the foot (the distals and most of the metatarsal) are fused to form the tarsometatarsus – a third segment of the leg, specific to birds. [5] [6] The upper bones of the foot , in turn, are fused with the tibia to form the tibiotarsus, as over time the centralia disappeared. [7] [6] [4] [8] The fibula also ...
Charcot–Marie–Tooth disease; Other names: Charcot–Marie–Tooth neuropathy, peroneal muscular atrophy, Dejerine-Sottas syndrome: The foot of a person with Charcot–Marie–Tooth disease: The lack of muscle, a high arch, and claw toes are signs of this genetic disease.
Deformities of the foot include hammer toe, trigger toe, and claw toe. Hammer toe can be described as an abnormal contraction or “buckling” of a toe. This is done by a partial or complete dislocation of one of the joints, which form the toes. Since the toes are deformed further, these may press against a shoe and cause pain.
An ungual (from Latin unguis, i.e. nail) is a highly modified distal toe bone which ends in a hoof, claw, or nail. Elephants and ungulates have ungual phalanges, as did the sauropods and horned dinosaurs. A claw is a highly modified ungual phalanx. As an adjective, ungual means related to nail, as in periungual (around the nail). [1]