Spinal Cord 2

Question 1

The superficial dorsal horn consists of

Answer 1

Laminae 1 and 2

Question 2

Grey matter is divided into

Answer 2

laminae of Rexed

Question 3

Which laminaes of rexed are in the dorsal horn?

Answer 3

1-6

Question 4

What does laminae 2 consist of?

Answer 4

Substantia gelatinosa of Rolando

Question 5

Motor neurone cell bodies lie in

Answer 5

Laminae 9 in ventral horn

Question 6

Extrafusal muscle fibres

Answer 6

Innervated by alpha motor neurones

Question 7

Intrafusal muscle fibres

Answer 7

Innervated by gamma and beta motor neurones

Question 8

Intrafusal muscle fibres constitute the _____ and are innervated by….

Answer 8

Muscle spindle, one sensory and one motor

Question 9

Injury to periphery nerves is caused by

Answer 9

Lower motor neurone lesion

Question 10

Symptoms of nerve injury

Answer 10

flaccid paralysis, rapid muscle

wasting, fibrillation and fasciculation

Question 11

Location of primary afferent cell bodies

Answer 11

DRG

Question 12

all primary afferents are

Answer 12

excitatory

Question 13

________ allow excitatory primary afferents to inhibit ______ muscles

Answer 13

Inhibitory interneurones, antagonistic

Question 14

Differences between lumbar and thoracic cord

Answer 14

Lumbar - thick grey matter - mn for limb

Thoracic- thin grey

Question 15

In which laminae are motor neurones?

Answer 15

Laminae IX

Question 16

Motor neurones in C8/T1 cord:

Answer 16

Pair 1 : trunk

Pair 4 : hand

Question 17

Motor neurone in thoracic cord:

Answer 17

To sympathetic trunk

Question 18

Motor neurones in sacral cord:

Answer 18

1. interior MN - flexor mn
2. Exterior MN - extensor mn
3. Last pair - for foot

Question 19

Cerebellar peduncles

Answer 19

Connect the cerebellum to the brain stem. There are six cerebellar peduncles in total, three on each side
(not seen in saggital)

Question 20

Instructions to mn are carried from the

Answer 20

brain by descending tract

Question 21

The corticospinal tracts arise in the _______ and end in the _______ (after crossing the midline).

Answer 21

cerebral cortex, spinal cord

Question 22

Upper motor neuron lesion

Answer 22

occurs in the neural pathway above the anterior horn cell of the spinal cord or motor nuclei of the cranial nerves.

Question 23

Upper motor neuron lesion symptoms

Answer 23

spastic paralysis, little muscle wasting, Babinsky sign