Monday 22 October 2012

Hallux

Hallux

In tetrapods, the hallux (big toe, great toe) is the innermost (most medial) toe of the foot. Despite its name it may not be the longest toe on the foot of some individuals. It is counted as digit I (one). The adjective form is "hallucal". The name stems from the Latin for the same, similar to the pollex, which refers to the thumb, the corresponding digit of the hand. n humans, the hallux is usually longer than the second toe. This is an inherited trait in humans, where the dominant gene causes a longer second toe ("Morton's toe" or "Greek foot") while the homozygous recessive genotype presents with the more common trait: a longer hallux. People with the rare genetic disease fibrodysplasia ossificans progressiva characteristically have a short hallux which appears to turn inward, or medially, in relation to the foot. In birds with anisodactyl or heterodactyl feet, the hallux is opposed or directed backwards and allows for grasping and perching.

Hallux

Hallux

Hallux

Hallux

Hallux

Hallux

Hallux

Hallux

Hallux


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