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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.
He interpreted all these features—the short second toe with enlarged claw, short metatarsus, etc.—as support for the use of the hind leg as an offensive weapon, where the sickle claw would strike downwards and backwards, and the leg pulled back and down at the same time, slashing and tearing at the prey.
Like other theropods, deinonychosaurs were bipedal; that is, they walked on their two hind legs. However, whereas most theropods walked with three toes contacting the ground, fossilized footprint tracks confirm that most deinonychosaurs held the second toe off the ground in a hyperextended position, with only the third and fourth toes bearing the weight of the animal.
Left: toes adducted (pulled towards the center) and spread (abducted); right, both feet clenched (plantar flexed) The upper foot is clenching (plantarflexing) at the MTP joints and at the joints of the toes; the central foot is lifting the toes (dorsiflexing) at the MTP joints; and the foot flat on the ground off to the side is in a neutral ...
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.
The lobster-claw architecture of the foot is described as the I and V toes being the only ones developed, resulting in the appearance of a split-foot. Morphology of the ulnar defect ranged from a shortened ulna to complete absence of the ulna with a curved, thickened radius.
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