Dermatomes and myotomes

Question 1

What nerve supplies C5?

Answer 1

Axillary

Question 2

What muscle does the axillary nerve supply?

Answer 2

Deltoid (little bit of aupraspinatus)

Question 3

What movement is the axillary nerve responsible for?

Answer 3

Shoulder abduction

Question 4

If the axillary nerve is damaged what would you see?

Answer 4

• common in shoulder dislocation
• sensory loss where a badge goes
• if weak shoulder abduction and adduction then need to think about a proximal myopathy

Question 5

What nerve supplies C6?

Answer 5

Musculocutaenous

Question 6

What muscles does the musculocutaneous nerve supply?

Answer 6

Bicep

Question 7

What movement is the musculocutaneous nerve in control of?

Answer 7

Elbow flexion

Question 8

What nerve supplies C7?

Answer 8

Radial

Question 9

What muscle does the radial nerve supply?

Answer 9

Elbow extension

Question 10

If the radial nerve is damaged how would a patient present?

Answer 10

Wrist drop as runs through the spinal groove of the humerus

Question 11

What is the nerve root of the ulnar nerve?

Answer 11

C8/T1

Question 12

What muscles does the ulnar nerve supply?

Answer 12

Hypothenar muscle
Abductor policis
Interossei of hand

Question 13

What movement is the ulnar nerve responsible for?

Answer 13

Wrist flexion and adduction

Question 14

Where does the median nerve supply?

Answer 14

Sensory sensation to the palmar thumb to 1/2 of the 4th finger

Question 15

Where does the ulnar nerve supply?

Answer 15

Sensory sensation to the little finger to half of the 4th finger

Question 16

Where does the radial nerve provide sensory sensation?

Answer 16

Anatomical snuffbox

Question 17

What nerve root is responsible for hip flexion?

Answer 17

L1/2

Question 18

Which muscles are responsible for hip flexion?

Answer 18

Iliopsoas

Sartorius

Question 19

What is the nerve roots for the gluteal nerve

Answer 19

L5/S1/S2

Question 20

Which muscles are supplied by the gluteal nerve

Answer 20

GLuteus maximus, medius and minimus

Question 21

What is the gluteal nerve responsible for

Answer 21

Hipe extension (if hip flexion and extension are weak think about proximal myopathy)

Question 22

What are the nerve roots for the femoral nerve?

Answer 22

L2/3/4

Question 23

What does the femoral nerve innovate

Answer 23

Quadriceps femoris

Question 24

What is the femoral nerve responsible for?

Answer 24

Knee extension (L2, 3, 4 knocks down the door)

Question 25

What are the nerve roots for the sciatic nerve?

Answer 25

L5/S1

Question 26

Which muscles are supplied by the sciatic nerve?

Answer 26

Hamstrings: - biceps femoris - semitendinosus - semimembranosus

Question 27

What action is the sciatic nerve in charge of

Answer 27

Knee flexion

Question 28

What is the nerve roots of the common peroneal?

Answer 28

L4/5

Question 29

What does the common peroneal supply?

Answer 29

Tibialis anterior

Question 30

What movement is the common peroneal responsible for?

Answer 30

ankle dorsiflexion (causes ankle drop)

Question 31

What is the nerve root of the tibial nerve?

Answer 31

S1/2

Question 32

What does the tibial nerve supply?

Answer 32

Gastonemius and soleus

Question 33

What movement is the tibial nerve responsible for?

Answer 33

ankle plantar flexion

Question 34

What do the nerve roots L4-S3 innervate?

Answer 34

Peroneus longus and brevis, tibialis anterior and posterior

Question 35

Which nerve has the nerve roots L4-S3?

Answer 35

Peroneal

Question 36

What is the superficial peroneal nerve responsible for?

Answer 36

Foot eversion

Question 37

What is the deep peroneal nerve responsible for?

Answer 37

Foot inversion

Question 38

Name 5 causes of proximal myopathy

Answer 38

1. Muscular dystrophy 2. Thyroid disease e.g. hyperthyroidism 3. Parathyroid disease 4. Pituitary dysfunction e.g. Addisons 5. Corticosteroids e.g. Cushings

Question 39

How do you differentiate a peroneal palsy from L4/5 radiculopathy?

Answer 39

1. Ask if any back pain (if yes probably a radiculopathy) b) Ask the patient to invert their ankle, if they can do it then it means that it is a peroneal nerve palsy, if they can’t then it is an L4/5 radiculopathy because it will also affect the tibialis posterior which will prevents you from being able to invert the foot.

Question 40

What level should you do a lumbar puncture?

Answer 40

L2-5

Question 41

How does a nerve disease present?

Answer 41

Distal weakness

Question 42

How does a muscle disease present?

Answer 42

Proximal weakness