Quiz 1: Pre-recorded lecture + myotomes

Question 1

Which intrinsic foot muscles are apart of the first layer (most superficial)?

Answer 1

• Abductor hallucis
• Flexor digitorum brevis
• Abductor digiti minimi

Question 2

Which intrinsic foot muscles are apart of the second layer?

Answer 2

• Quadratus plantae
• Lumbricals

Question 3

Which intrinsic foot muscles are apart of the third layer?

Answer 3

• Flexor hallucis brevis
• Adductor hallucis
• Flexor digiti minimi brevis

Question 4

Which intrinsic foot muscles are apart of the fourth layer (most deep)?

Answer 4

• Plantar interossei
• Dorsal interossei

Question 5

What is the origin and insertion of the plantar interossei?

Answer 5

Origin: Medial metatarsal 3-5

Insertion: Extensor hoods 3-5

Question 6

What is the origin and insertion of the dorsal interossei?

Answer 6

Origin: Metatarsal shafts

Insertion: Extensor hoods 2-4

Question 7

What is the action of the lumbricals?

Answer 7

Flex metatarsophalangeal joints, extend interphalangeal joints

Question 8

What is the action of the quadratus plantae?

Answer 8

Corrects the line of pull and assists FDL in toe flexion

Question 9

What is the action of plantar interossei?

Answer 9

Adduction for toes 3-5

Question 10

What is the action of dorsal interossei?

Answer 10

Abduction for toes 2-4

Question 11

Which action/muscle corresponds with the L2 myotome? How do you test it?

Answer 11

Hip flexion (Iliopsoas)

Question 12

Which action/muscle corresponds with the L3 myotome?

Answer 12

Knee extension (Quads)

Question 13

Which action/muscle corresponds with the L4 myotome?

Answer 13

Ankle Dorsiflexion (Anterior Tibialis)

Question 14

Which action/muscle corresponds with the L5 myotome? How do you test it?

Answer 14

Big toe extension (Extensor hallucis longus)

Question 15

Which action corresponds with the S1 myotome? How do you test it?

Answer 15

Ankle plantarflexion (Gastroc + Soleus)