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Neurology > Dermatomes and myotomes > Flashcards

Dermatomes and myotomes Flashcards

1
Q

What nerve supplies C5?

A

Axillary

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2
Q

What muscle does the axillary nerve supply?

A

Deltoid (little bit of aupraspinatus)

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3
Q

What movement is the axillary nerve responsible for?

A

Shoulder abduction

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4
Q

If the axillary nerve is damaged what would you see?

A
  • common in shoulder dislocation
  • sensory loss where a badge goes
  • if weak shoulder abduction and adduction then need to think about a proximal myopathy
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5
Q

What nerve supplies C6?

A

Musculocutaenous

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6
Q

What muscles does the musculocutaneous nerve supply?

A

Bicep

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7
Q

What movement is the musculocutaneous nerve in control of?

A

Elbow flexion

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8
Q

What nerve supplies C7?

A

Radial

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9
Q

What muscle does the radial nerve supply?

A

Elbow extension

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10
Q

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

A

Wrist drop as runs through the spinal groove of the humerus

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11
Q

What is the nerve root of the ulnar nerve?

A

C8/T1

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12
Q

What muscles does the ulnar nerve supply?

A

Hypothenar muscle
Abductor policis
Interossei of hand

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13
Q

What movement is the ulnar nerve responsible for?

A

Wrist flexion and adduction

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14
Q

Where does the median nerve supply?

A

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

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15
Q

Where does the ulnar nerve supply?

A

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

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16
Q

Where does the radial nerve provide sensory sensation?

A

Anatomical snuffbox

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17
Q

What nerve root is responsible for hip flexion?

A

L1/2

18
Q

Which muscles are responsible for hip flexion?

A

Iliopsoas

Sartorius

19
Q

What is the nerve roots for the gluteal nerve

A

L5/S1/S2

20
Q

Which muscles are supplied by the gluteal nerve

A

GLuteus maximus, medius and minimus

21
Q

What is the gluteal nerve responsible for

A

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

22
Q

What are the nerve roots for the femoral nerve?

A

L2/3/4

23
Q

What does the femoral nerve innovate

A

Quadriceps femoris

24
Q

What is the femoral nerve responsible for?

A

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

25
Q

What are the nerve roots for the sciatic nerve?

A

L5/S1

26
Q

Which muscles are supplied by the sciatic nerve?

A

Hamstrings:

  • biceps femoris
  • semitendinosus
  • semimembranosus
27
Q

What action is the sciatic nerve in charge of

A

Knee flexion

28
Q

What is the nerve roots of the common peroneal?

A

L4/5

29
Q

What does the common peroneal supply?

A

Tibialis anterior

30
Q

What movement is the common peroneal responsible for?

A

ankle dorsiflexion (causes ankle drop)

31
Q

What is the nerve root of the tibial nerve?

A

S1/2

32
Q

What does the tibial nerve supply?

A

Gastonemius and soleus

33
Q

What movement is the tibial nerve responsible for?

A

ankle plantar flexion

34
Q

What do the nerve roots L4-S3 innervate?

A

Peroneus longus and brevis, tibialis anterior and posterior

35
Q

Which nerve has the nerve roots L4-S3?

A

Peroneal

36
Q

What is the superficial peroneal nerve responsible for?

A

Foot eversion

37
Q

What is the deep peroneal nerve responsible for?

A

Foot inversion

38
Q

Name 5 causes of proximal myopathy

A
  1. Muscular dystrophy
  2. Thyroid disease e.g. hyperthyroidism
  3. Parathyroid disease
  4. Pituitary dysfunction e.g. Addisons
  5. Corticosteroids e.g. Cushings
39
Q

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

A
  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.
40
Q

What level should you do a lumbar puncture?

A

L2-5

41
Q

How does a nerve disease present?

A

Distal weakness

42
Q

How does a muscle disease present?

A

Proximal weakness

Neurology (4 decks)

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