spinal cord and the periphery

Question 1

motor neurons have their cell bodies in the

Answer 1

ventral horn of grey matter

Question 2

sensory fibres enter via the dorsal root and are kept in the

Answer 2

dorsal horn of grey matter

Question 3

white matter is arrange in what three columns?

Answer 3

posterior

lateral

anterior

Question 4

corticospinal/pyramidal tract

Answer 4

carries motor impulses from motor cortex to skeletal muscles

(cortex in the brain to the spinal cord)

Question 5

posterior/dorsal column

Answer 5

carries touch, tactile localisation, vibration sense

all except pain and temperature

Question 6

lateral spinothalamic tract

Answer 6

pain and temperature

sensory

Question 7

what are the 2 neurons in the corticospinal/pyramidal tract?

Answer 7

UMN

LMN

Question 8

there are 3 neurons between peripheral receptor and cortex

Answer 8

1st order

2nd order

3rd order

Question 9

2nd order neurons are the ones that

Answer 9

pass to the other side

Question 10

flexor reflex helps protect the body from

Answer 10

painful stimuli

Question 11

reflexes are mediated by which motor neuron?

Answer 11

LMN

Question 12

BUT reflexes are exaggerated in

Answer 12

UMN

Question 13

UMN Lesions cause increase

Answer 13

tone

spasticity

Question 14

LMN lesions cause increased

Answer 14

flaccidity

Question 15

if a motor lesion is below the dessucation - then the signs and symptoms are

Answer 15

ipsilateral

Question 16

signs and symptoms of a left UMN lesion at the IC (brainstem)

Answer 16

right sided paralysis

hyper-reflexes

increased tone

Question 17

signs and symptoms of a left UMN lesion at the upper cervical spinal cord (before decussation)

Answer 17

left sided paralysis

hyper-reflexia

increased tone

Question 18

left LMN lesion at the end level of the spinal cord

Answer 18

left sided paralysis

absent reflexes

flaccid

Question 19

motor neuron disease is usually of what neuron?

Answer 19

lower motor neuron

Question 20

pain and temperature are always lost from the

Answer 20

contralateral side

Question 21

LMN or UMN mediates reflexes?

Answer 21

LMN