Myotomes

Question 1

Which muscle is responsible for shoulder abduction?

Answer 1

Deltoid muscle, via axillary nerve.

Question 2

What is the role of C5 myotome?

Answer 2

Shoulder abduction

Question 3

What is the role of C6?

Answer 3

Elbow flexion

Question 4

What is the role of C7 myotome?

Answer 4

Elbow extension

Question 5

What is the role of C8 myotome?

Answer 5

Wrist and finger flexion.

Question 6

What is the role of T1 myotome?

Answer 6

Finger abduction via dorsal interossei

Question 7

What is the role of L2 myotome?

Answer 7

Hip flexion.

Question 8

What is the role of L3 myotome?

Answer 8

Hip adduction.

Question 9

What is the role of L4 myotome?

Answer 9

Knee extension

Question 10

What is the role of L5 myotome?

Answer 10

Plantarflexion

Question 11

What is the role of S1 myotome?

Answer 11

Dorsiflexion

Question 12

What is the role of S2 myotome?

Answer 12

Knee flexion

Question 13

What are the myotomes for the ankle reflex?

Answer 13

S1 and s2

Question 14

Multiple sclerosis- pathophysiology

Answer 14

Immune destruction of myelin sheath in the CNS the leads to scar tissue formation. Causes motor weakness and sensory deficit such as paraesthesia and visual changes, presenting with both upper and lower motor neuron lesions.

Question 15

Spinal muscular atrophy

Answer 15

Hereditary condition where there is degradation of lower motor neurones of the spinal cord that causes loss of muscle tone, reduced reflexes and can manifest in adulthood.

Question 16

What are oligodendrocytes?

Answer 16

Produce myelin in CNS.

Question 17

What produces myelin in the PNS?

Answer 17

Schwann cells