Muscles of the foot Flashcards
What are the muscles of the second and third layer of the sole?
- Quadratus plantae
- Lumbricals
- Flexor hallicus brevis
- Adductor hallicus
- Flexor digiti minimi brevis
What are the muscles of the first layer of the sole?
- Abductor hallicus
- Flexor digitorum brevis
- Abductor digiti minimi
What are the muscles of the fourth layer of the sole?
- Plantar interossei (3)
- Dorsal interossei (4)
What are the origin and insertion of abductor hallicus?
- Origin: medial tubercle of tuberosity of calcaneus, flexor retinaculum, plantar aponeurosis
- Insertion: medial side of base if proximal phalanx of first digit
What is the action of abductor hallicus?
Abducts and flexes great toe
What are the origin and insertion of FDB?
- Origin: Medial tubercle of tuberosity of calcaneus, plantar aponeurosis and intermuscular septa
- Insertion: Both sides of middle phalanges of lateral four digits
What is the action of flexor digitorum brevis?
Flexes lateral four digits
What are the origin and insertion of ADM?
- Origin: Medial and lateral tubercles of tuberosity of calcaneus, plantar aponeurosis and intermuscular septa
- Insertion: Lateral side of base of proximal phalanx of fifth digit
What is the action of ADM?
Abducts and flexes little toe
What are the origin and insertion of qudratus plantae?
- Origin: Medial surface and lateral margin of plantar surface of calcaneus
- Insertion: Posterolateral margin of tendon of flexor digitorum longus
What is the action of quadratus plantae?
Assists FDL in flexing lateral 4 digits
What are the origin and insertion of the lumbricals?
- Origin: Tendons of FDL
- Insertion: Medial aspect of expansion over lateral 4 digits
What is the action of the lumbricals?
- Flex proximal phalanges
- Extend middle and distal phalanges of lateral four digits
What are the origin and insertion of the FHB?
- Origin: Plantar surfaces of cuboid and lateral cuneiforms
- Insertion: Both sides of the base of the proximal phalanx of first digit
What is the action of FHB?
Flexes proximal phalanx of great toe
What are the origin and insertion of Adductor hallicus?
- Origin: (Oblique head) bases of metatarsals 2-4; (transverse head) plantar ligaments of metatarsophalangeal joints
- Insertion: Lateral side of base of proximal phalanxe of first digit
What is the action of AH?
- Adducts great toe
- Assists in maintaining transverse arch of foot
What are the origin and insertion of FDMB?
- Origin: Base of fifth metatarsal
- Insertion: Base of proximal phalanx of fifth digit
What is the action of FDMB?
- Flexion of proximal phalanx of little toe
What are the origin and insertion of the plantar interossei?
- Origin: Bases and medial sides of metatarsals 3-5
- Insertion: Medial sides of bases of proximal phalanges of digits 3-5
What is the action of the plantar interossei?
- Adducts difits 2-4
- Flex metatarsophalangeal joints
What are the origin and insertion of the dorsal interossei?
- Origin: Adjescent sides of metatarsals 1-5
- Insertion: (1) Medial side of proximal phalanx of 2nd digit; (2-4) lateral sides of digits 2-4
