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Since the intersseous muscles cross on the metatarsophalangeal joint, then they act on that specific joint and cause adduction of toes III, IV, and V. [1] Adduction itself is not of extreme importance to the toes, but these muscles work together with the dorsal interosseous muscles in flexion of the foot.
The interosseous muscles of the foot are muscles found near the metatarsal bones that help to control the toes. They are considered voluntary muscles. They are generally divided into two sets: 4 Dorsal interossei - Abduct the digits away from the 2nd digit (away from axial line) and are bipennate.
The bases of the other four metatarsals are connected by the dorsal, plantar, and interosseous ligaments. The dorsal ligaments pass transversely between the dorsal surfaces of the bases of the adjacent metatarsal bones. The plantar ligaments have a similar arrangement to the dorsal.
First, second, and third muscle layers, and the dorsal and plantar interossei The intrinsic muscles in the sole are grouped in four layers: In the first layer, the flexor digitorum brevis is the large central muscle located immediately above the plantar aponeurosis.
The flexor hallucis longus is situated on the fibular side of the leg. It arises from the inferior two-thirds of the posterior surface of the body of the fibula, with the exception of 2.5 cm at its lowest part; from the lower part of the interosseous membrane; from an intermuscular septum between it and the peroneus muscles, laterally, and from the fascia covering the tibialis posterior, medially.
Anatomical diagrams illustrating the components of the plantar fascia. Dissection of the plantar aponeurosis: LP, lateral part; CP, central part; MP, medial part; L, length; W, width. Five central part plantar aponeurosis bundles. The plantar fascia is the thick central portion of the fascia investing the plantar muscles.
The foot (pl.: feet) is an anatomical structure found in many vertebrates.It is the terminal portion of a limb which bears weight and allows locomotion.In many animals with feet, the foot is a separate [clarification needed] organ at the terminal part of the leg made up of one or more segments or bones, generally including claws and/or nails.
Muscle Origin Insertion Innervation Main Action Fibularis longus: Head and superior two thirds of lateral surface of fibula: Base of 1st metatarsal and medial cuneiform: Superficial fibular nerve (L5, S1, S2) Everts foot and weakly plantarflexes ankle Fibularis brevis: Inferior two thirds of lateral surface of fibula