Lecture 4

Question 1

What part of the brain contains more neuron than the entire rest of the brain

Answer 1

Cerebellum

Question 2

The cerebellum has 3 functional parts

Answer 2

vestibulocerebellum
Spinocerebellum
Cerebrocerebellum

Question 3

vestibulocerebellum:

Answer 3

balance and eyemovement

Question 4

Spinocerebellum:

Answer 4

enhances muscle tone, coordinates skilled voluntary movements, accurate timing of multiple joints, input from motorcortex, feedback from peripheral receptors, fine tuning execution and termination of a movement to assure smooth and precise coordination, rapidly changing/phasic movements (piano)

Question 5

Cerebrocerebellum:

Answer 5

planning and initiating voluntary activity, providing input to cortex

Question 6

Question 7

Question 8

Cerebellum cortex has 3 layers:

Answer 8

outer molecular layer, Purkinye layer, inner granular layer

Question 9

Cerebellar disease:

Answer 9

poor ballance, nystagmus, reduced muscle tone, inability to rapidly alternate movements, inability to stop and start movement quickly (intention tremor)

Question 10

Critical relay station between spinal cord and rest of brain

Answer 10

Brain stem,medulla, pons, midbrain

Question 11

Brain stem,medulla, pons, midbrain consists of

Answer 11

12 pairs of cranial nerves

Question 12

Neuronal clusters of brainstem, medulla, pons, MB

Answer 12

respiratory control center, heart+blood vessel function

Question 13

brainstem, medulla, pons, MB also responsible for

Answer 13

• Regulating muscle reflexes for posture
• Reticular formation: integrates sensory input, ascending as reticular activating system (RAS) for cortical alertness

Question 14

Question 15

MIdbrain functions

Answer 15

Eye movement

Question 16

Pons functions

Answer 16

Relay station between cerebrum and cerebellum; coordination of breathing

Question 17

Medulla oblongata

Answer 17

Control of involuntary functions

Question 18

Reticular formation

Answer 18

Arousal, sleep, muscle tone, pain modulation.

Question 19

Brain stemorigin of cranial nerves

Answer 19

Question 20

Question 21

Question 22

Reticular formation damage:

Answer 22

coma, with respiratory center intact

Question 23

Reticular formation is the _______ center

Answer 23

Vomiting centre (eg increased intracranial pressure)