Motor system

Question 1

Lesions between Pontine Reticular Formation and Midbrain:
Lesions above Lateral Vestibular Nucleus

Answer 1

decerebrate rigidity
–> spasticity due to facilitation of myotactic stretch reflex

Question 2

Lesions above Red Nucleus

Answer 2

corticate posturing and intact
tonic neck reflexes

Question 3

Lesion in subthalamic nucleus causes

Answer 3

hemiballismus

Question 4

Lesion in the Globus pallidus

Answer 4

inability to maintain posture

Question 5

main NT in Basal Ganglia

Answer 5

GABA

Question 6

Epileptic event in Primary motor cortex causes

Answer 6

Jacksonian seizure - focal partial seizure

Question 7

decreases duration of REM sleep

Answer 7

Age
Alcohol
Benzodiazipine
Amphetamine

Question 8

Destroying your thalamus would cause

Answer 8

RETROGRADE amnesia (cannot recall old memories

Question 9

Destroying your hippocampus

Answer 9

ANTEROGRADE amnesia (cannot form new memories).

Question 10

BBB exist in all areas of the brain, EXCEPT

Answer 10

Circumventricular
Organs (CVOs):
o Some areas of the Hypothalamus (including neurohypophysis)
o Pineal gland
o Area Postrema

Question 11

most potent mechanism for heat generation

Answer 11

Shivering

other:
Thyroid hormone production
dec sweating
piloerection
skin vasoconstriction
brown fat in babies