Spinal Cord 2 Flashcards Preview

ANAT2010 > Spinal Cord 2 > Flashcards

Flashcards in Spinal Cord 2 Deck (23)
Loading flashcards...
1

The superficial dorsal horn consists of

Laminae 1 and 2

2

Grey matter is divided into

laminae of Rexed

3

Which laminaes of rexed are in the dorsal horn?

1-6

4

What does laminae 2 consist of?

Substantia gelatinosa of Rolando

5

Motor neurone cell bodies lie in

Laminae 9 in ventral horn

6

Extrafusal muscle fibres

Innervated by alpha motor neurones

7

Intrafusal muscle fibres

Innervated by gamma and beta motor neurones

8

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

Muscle spindle, one sensory and one motor

9

Injury to periphery nerves is caused by

Lower motor neurone lesion

10

Symptoms of nerve injury

flaccid paralysis, rapid muscle
wasting, fibrillation and fasciculation

11

Location of primary afferent cell bodies

DRG

12

all primary afferents are

excitatory

13

________ allow excitatory primary afferents to inhibit ______ muscles

Inhibitory interneurones, antagonistic

14

Differences between lumbar and thoracic cord

Lumbar - thick grey matter - mn for limb
Thoracic- thin grey

15

In which laminae are motor neurones?

Laminae IX

16

Motor neurones in C8/T1 cord:

Pair 1 : trunk
Pair 4 : hand

17

Motor neurone in thoracic cord:

To sympathetic trunk

18

Motor neurones in sacral cord:

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

19

Cerebellar peduncles

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

20

Instructions to mn are carried from the

brain by descending tract

21

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

cerebral cortex, spinal cord

22

Upper motor neuron lesion

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

23

Upper motor neuron lesion symptoms

spastic paralysis, little muscle wasting, Babinsky sign