Deep intrinsic muscles of sole (PART 1) Flashcards
Insertion of quadratus plantae?
Flexor digitorum longus tendon (lateral border)
Innervation quadratus plantae?
Lateral plantar n. (S1-S3)
Action of quadratus plantae?
Redirects and augments the pull of flexor digitorum longus
Origin of lumbricals?
Flexor digitorum longus tendons (medial borders)
Insertion of lumbricals?
2nd to 5th toes (at dorsal aponeuroses)
Innervation of lumbricals?
1st lumbrical: medial plantar n. (S2,S3)
2nd-4th lumbrical: lateral plantar n. (S2, S3)
Action of lumbricals?
Flexoes the MTP joints of 2nd to 5th toes
Extension of IP joints of 2nd to 5th toes
Adducts 2nd to 5th toes toward the big toe
Origin of flexor hallucis brevis?
Cuboid, lateral cuneiforms, and plantar calcaneocuboid ligament
Insertion of flexor hallucis brevis?
1st toe (at base of proximal phalanx via medial and lateral sesamoids)
Innervation of flexor hallucis brevis?
MEdial head: medial plantar n. (S1, S2)
Lateral head: lateral plantar n. (S1, S2)
Action of flexor hallucis brevis?
Flexes the first MTP joint,
Supports longitudinal arch
Origin of adductor hallucis?
Oblique head: 2nd to 4th metatarsals (at bases)
Transverse head: MTPs of 3rd to 5thtoes, deep transverse metatarsal ligaments
Insertion of adductor hallucis?
1st proximal phalanx (at base, by a common tendonvia the lateral sesamoid)
Innervation of adductor hallucis?
Lateral plantar n. deep branch (S2, S3)
Action of adductor hallucis?
FLexes the first MTP joint
Adducts big toe
Transverse head: supports transverse arch
Oblique head: supports longitudinal arch
