METATARSOPHALANGEAL JOINTS

 

Joint animation

DESCRPITION: The articular surfaces of these joints are the heads of the metatarsal bones and the base of the proximal phalanges. They are five in number, one for each digit (toe). It has fibrous capsule strengthened by some ligaments.

LIGAMENTS:

It has no dorsal ligament because of the position of the ligaments of the extensor expansion.

NERVE SUPPLY:

 BLOOD SUPPLY:

MOVEMENTS: 

         Flexion: Flexion is by the flexor digitorum brevis, flexor digitorium longus,  assisted by flexor accessorius, lumbricals and interossei. In the little toe, flexor digiti minimi assists this function, and for the big toe flexor hallucis brevis and flexor hallucis longus.

         Extension is performed by extensor digitorum longus, extensor digitorum brevis and extensor hallucis longus.

         Adduction: performed by adductor hallucis and the plantar interossei.

         Abduction: By abductor hallucis for big toe, abductor digiti minimi for the small toe. The rest is by the dorsal interossei.

Gallery

Neutral

Extension

Hyperextension

Flexion

Skin

Interior

Bones

 

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