Unit 5 - Lower Limb: Superficial Intrinsic Muscles of Sole of Foot (Ex. IV)

Question 1

flexor digitorum brevis

Answer 1

O: M process of calcaneal tuberosity; plantar aponeurosis
I: sides of middle phalanges of toes 2-5
Inn: M plantar n. (S1, S2)
A: flexes MTPs and PIPs of toes 2-5; supports longitudinal arch

Question 2

abductor digiti minimi

Answer 2

O: M process of calcaneal tuberosity; plantar aponeurosis
I: base of proximal phalanx of 5th toe; tuberosity of 5th metatarsal
Inn: L plantar n. (S1-S3)
A: flexes MTP of 5th toe; abducts 5th toe; supports longitudinal arch

Question 3

abductor hallucis

Answer 3

O: M process of calcaneal tuberosity
I: base of proximal phalanx of 1st toe via M sesamoid
Inn: M plantar n. (S1, S2)
A: 1st MTP - flexes and abducts 1st toe; supports longitudinal arch