3 Intrinsic Muscles - FIRST Layer Flashcards
Abductor Hallucis
Origin
Insertion
Action
Nerve Supply
Origin: Medial tuberosity of calcaneum and flexor retinaculum
Insertion: Base of proximal phalanx of the hallux
Action: Flexes and abducts hallux; braces medial longitudinal arch
Nerve Supply: Medial plantar nerve
Flexor Digitorum Brevis
Origin
Insertion
Action
Nerve Supply
Origin: Medial tuberosity of calcaneum
Insertion: Four tendons to four lateral toes – inserted into borders of middle phalanx: tendons perforated by those of flexor digitorum longus
Action: Flexes lateral four toes; braces medial and lateral longitudinal arches
Nerve Supply: Medial plantar nerve
Abductor Digiti Minimi
Origin
Insertion
Action
Nerve Supply
Origin: Medial and lateral tuberosities of calcanceum
Insertion: Base of proximal phalanx of 5th toe
Action: Flexes and abducts 5th toe; braces lateral
longitudinal arch
Nerve Supply: Lateral plantar nerve
Origin: Medial tuberosity of calcaneum and flexor retinaculum
Abductor Hallucis
Insertion: Base of proximal phalanx of the hallux
Abductor Hallucis
Action: Flexes and abducts hallux; braces medial longitudinal arch
Abductor Hallucis
Origin: Medial tuberosity of calcaneum
Flexor Digitorum Brevis
Insertion: Four tendons to four lateral toes – inserted into borders of middle phalanx: tendons perforated by those of flexor digitorum longus
Flexor Digitorum Brevis
Action: Flexes lateral four toes; braces medial and lateral longitudinal arches
Flexor Digitorum Brevis
Origin: Medial and lateral tuberosities of calcanceum
Abductor Digiti Minimi
Insertion: Base of proximal phalanx of 5th toe
Abductor Digiti Minimi
Action: Flexes and abducts 5th toe; braces lateral
longitudinal arch
Abductor Digiti Minimi
NAME THE 3 INTRINSIC MUSCLES OF THE FIRST LAYER
Abductor Hallucis
Abductor Digiti Minimi
Flexor Digitorum Brevis
