Lec 17 - foot muscles

Question 1

Flexor digitorum brevis

Answer 1

MA: flexion is digits 2-5 @ MTP & PIP joints

PA: medial tubercle of calcaneal tuberosity, plantar aponerosis, inter muscular septa

DA: both sides of middle phalanges of digits 2-5

N: medial plantar nerve L5 S1

Question 2

Quadratus Plamtae

Answer 2

MA: assists flexor digitorum longus with digits 2-5 flexion @ MTP and IP joints

PA: medial calcaneus

DA: flexor digitorum longus tendon

N: Lateral plantar N S1 S2 S3

Question 3

Lumbricals

Answer 3

MA: MTP Flexion and PIP & IP Extension of digits 2-5

PA: flexor digitorum longus tendons

DA: medial aspect of extensor expansion over digits 2-5

N: medial 1; medial plantar nerve L5 S1, Lateral 3; lateral plantar nerve S1 S2 S3

Question 4

Adductor Hallucis

Answer 4

MA: 1st digit adduction (supports transverse arch by pulling metatarsals medial)

PA:
Oblique head: bases of metatsadls 2-4
Transverse head; plantar ligaments of MTP joints

DA: lateral side of base of proximal phalanx of 1st digit

N:Lateral plantar N S1 S2 S3

Question 5

Flexor Hallucis Brevis

Answer 5

MA: 1st MTP joint flexion

PA: plantar cuboid and lateral cuneiforms

DA: both sides of of base of proximal phalanx of 1st digit (contains two sesamoid bones)

N: Medial plantar nerve L5 S1

Question 6

Plantar interossei

Answer 6

MA: digits 3-5 Adduction

PA: Plantar aspects of medial sides of shafts of metatarsals 3-5 (on big toe side)

DA: medial phalanges of digits 3-5

N:Lateral plantar nerve S1 S2 S3

Question 7

Dorsal Interossei

Answer 7

MA: DIGITS 2-4 abduction @ MTP

PA: adjacent sides of shafts of metatarsals 1-5

DA:
1st - medial side of proximal phalanx of 2nd digit

2nd-4th: lateral sides of digits 2-4

N: Lateral plantar N S1 S2 S3