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Flashcards in 2. Structure of the CNS Deck (28)
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1

What is the pyramidal system?

Upper motor neuron starts in the pre-central glyrus
Passes through the pyramids of the medulla
Conscious movement

2

What is the extrapyramidal system?

Upper motor neuron starts in other brain centre nuclei (basal ganglia)
Don't pass through pyramids
Fine tune movement

3

What is the cerebellum responsible for?

Balance
Tone
Posture
Co-ordination and planning movement

4

What disease affects the cerebellum?

Transient cerebellar disease: drunk
Associated with intention tremor

5

What are the functions of the basal ganglia?

Diffuse set of nuclei responsible for allowing/stopping movements

6

Name the basal ganglia

Nucleus accumbens
Caudate
Putamen
Globus pallidus
Subthalamic nucleus
Substantia nigra

7

What disease affects the basal ganglia?

Parkinson's
Associated with resting tremor

8

What is the function of the thalamus?

Sensory relay station

9

Where is the thalamus located?

Either side of the third ventricle

10

What type of information travels in dorsal columns?

Touch
Proprioreception

11

What path is taken by nerves conveying touch and proprioception?

Dorsal columns:
First nerve enters and goes up to medulla
Second decussates in the medulla, goes to thalamus
Third nerve up to somatosensory cortex

12

What type of information travels in the spinothalamic tract?

Pain
Temperature

13

What path is taken by nerves conveying pain and temperature?

Spinothalamic tract
First nerve synapses with second in spinal cord
Second goes to thalamus
Third goes to somatosensory cortex

14

What is contained in the limbic system?

Cingulate gyrus
Hippocampal formation
Amygdala

15

What is the function of the limbic system?

Emotion
Memory
Maintain attention to surroundings
Drives feeding and mating behaviour

16

What is the flow of CSF through the ventricular system?

Lateral ventricles
Intraventricular foramen of Monro
3rd ventricle/cavity of diencephalon
Central aqueduct of sylvius
4th ventricle
-Foramina of Magendie
-Foramina of Lushka

17

Cranial Nerve 1

Smell

18

Cranial Nerve 2

Vision

19

Cranial Nerve 3,4,6

Eye movement

20

Cranial Nerve 5

Facial and scalp sensation
Mandibular movements

21

Cranial Nerve 7

Facial expression

22

Cranial Nerve 8

Hearing
Balance

23

Cranial Nerve 9,10

Swallowing
Phonation

24

Cranial Nerve 11

Neck and head movement

25

Cranial Nerve 12

Tongue movement

26

What does the cauda equina activate?

Bladder
Bowel
Sexual organs
Legs

27

What are the signs of Cauda Equina Syndrome?

Lower back pain
Pain radiating down leg
Loss of bowel or bladder control
Weakness, tingling and numbness in saddle region

28

What causes Cauda Equina Syndrome?

Slipped disc
Tumours near spine
Injury