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*******Neuro clerkship > Muscles/reflexes > Flashcards

Muscles/reflexes Flashcards

1
Q

shoulder abduction

A

deltoid
axillary nerve
C5

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2
Q

elbow flexion

A

biceps
musculocutaneous nerve
C5, C6

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3
Q

elbow extension

A

triceps
radial nerve
C7

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4
Q

wrist extension

A

extensor carpi radialis and ulnaris
radial nerve
C6, C7

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5
Q

wrist flexion

A

flexor carpi radialis and ulnaris
median nerve, ulnar nerve
C7, C8

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6
Q

finger extension

A

extensor digitorum profundus/superficialis
radial nerve
C7

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7
Q

finger flexion

A

flexor digitorum profundus/superficialis
median and ulnar nerve
C8

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8
Q

thumb abduction

A

abductor pollicis brevis
median nerve
T1

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9
Q

finger abduction

A

dorsal interossei
ulnar nerve
T1

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10
Q

hip flexion

A

ilopsoas
lumbar plexus, femoral nerve
L1/L2

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11
Q

hip extension

A

gluteus maximus
inferior gluteal nerve
L5, S1, S2

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12
Q

knee flexion

A

hamstrings
sciatic nerve
L5, S1, S2

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13
Q

knee extension

A

quadriceps femoris
femoral nerve
L3, L4

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14
Q

ankle dorsiflexion

A

tibialis anterior
deep peroneal nerve
L4, L5

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15
Q

ankle plantarflexion

A

gastroc and soleus
sciatic nerve
S1, S2

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16
Q

great toe dorsiflexion

A

extensor hallicus longus
deep peroneal nerve
L5

17
Q

ankle inversion

A

tibialis posterior
tibial nerve
L4, L5

18
Q

ankle eversion

A

peronei
superficial peroneal nerve
L5, S1

19
Q

biceps reflex

A

C5, C6

20
Q

triceps reflex

A

C7

21
Q

patellar reflex

A

L3, L4

22
Q

ankle reflex

A

S1, S2

23
Q

Normal LP findings

A

glucose 2/3 serum glucose
only trace protein
<5 cells
opening pressure 60-150 mmH2O

24
Q

What is bright on T1 MRI?

A
  • fat, so myelin is bright
25
Q

What is dark on T1 MRI?

A
  • water, including CSF
26
Q

What is bright on T2?

A

the opposite: water

27
Q

What is FLAIR?

A
  • T2 image with CSF signal inverted -> low intensity

- good for early subtle changes like edema

28
Q

What is the imagery of choice for fresh blood?

A

CT scan

29
Q

What is most sensitive for early cerebral ischemia/infarct?

A

diffusion weighted imaging;

areas of restricted diffusion appear bright

30
Q

Safety pros/cons to MRI?

A

pro: safer for pregnancy, gadolinium can be used if allergic to IV contrast and is less nephrotoxic
con: absence of metal objects, pacemaker, and defribillator required

31
Q

brain death criteria

A
  • patient is comatose
  • no brainstem reflexes
  • no spontaneous resp. even when CO2 allowed to rise
  • no confounding factors (drug OD, hypothermia)
  • can confirm w/ EEG or cerebral angiography

*******Neuro clerkship (8 decks)

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