Muscle Chart: 4th Plantar Surface Layer

Question 1

Plantar Interossei (foot)

Origin, Insertion, Innervation, Blood Supply

Answer 1

Origin: Medial surface of 3-5 metatarsals

Insertion: Medial surfaces of proximal phalanges of 3-5 toes

Innervation: Lateral plantar nerve (tibial) (S1, S2)

Blood Supply: Lateral plantar artery

Question 2

Plantar Interossei Movements

Answer 2

Adduct 3-5 toes at MTP joint

Question 3

Dorsal Interossei (foot)

Origin, Insertion, Innervation, Blood Supply

Answer 3

Origin: Adjacent surfaces of all metatarsals, 1st medial surface of proximal phalanx of 2nd toe

Insertion: 2-4 lateral surfaces of proximal phalanges of 2-4 toes

Innervation: Lateral plantar nerve (tibial) (S1, S2)

Blood Supply: Lateral plantar artery

Question 4

Dorsal Interossei Movements (foot)

Answer 4

Abducts 2-4 toes of MTP joints

Flexes 2-4 toes at MTP joints