2nd Layer of Foot Muscles

Question 1

Quadratus Plantae

Answer 1

O: Medial Surface and Lateral Margin of Plantar Surface of Calcaneus
I: Posterolateral Margin of Tendon of FDL
N: Lateral Plantar Nerve (S2, S3)
A: Assists FDL in Flexing Lateral 4 Digits

Question 2

Lumbricals

Answer 2

O: Tendons of FDL
I: Medial Aspect of Expansion over Lateral 4 Digits
N: Medial 1- Medial Plantar Nerve (S2, S3); Lateral 3- Lateral Plantar Nerve (S2, S3)
A: Flex Proximal Phalanges, Extend Middle and Distal Phalanges of Lateral 4 Digits