This table summarizes the origin, insertion, innervation and action of the muscles of the foot region. Muscles are arranged into their 4 superficial and deep groups. Also provides mnemonics and memory devices for common OSCE questions.
Gray's Anatomy 50 tough Test Questions and answers 5th edition Richard Drake - New 2024
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Intrinsic muscles of foot
Arterial
Muscle Origin Insertion Action supply
Dorsal muscles (above bones of the foot)
Extensor digitorum brevis Calcaneus (front part) Merge with tendons of exte
Dorsiflexion
Extensor hallucis brevis Calcaneus (front part) Proximal phalynx of 1st to
Plantar muscles (under bones of the foot). Arranged into 4 layers
1st layer (superficial) - "Telephone sign" => little finger and thumb 'abducted' + other fingers flexed
Flexor digitorum brevis
Abductor hallucis
Abductor digiti minimi
2nd layer - "Volume down sign" => (Reminds you of a quadrilateral) + flexion at MTPJ, but extension at interphalangeal
Quadratus plantaris
Lumbricals
3rd layer - "Boy scouts" => flexion of little finger and thumb + adduction of thumb
Adductor hallucis
Flexor hallucis brevis
Flexor digiti minimi
4th layer - "Live long and prosper" => Abduction and adduction of fingers = interossei. DAB the PAD
Dorsal interossei (lateral)
Plantar interossei (medial)
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