8.2 Consciousness Flashcards
1
Q
why can antihistamines cause drowsiness?
A
pathway of hypothalamus projecting histamine to cortex is blocked
2
Q
why can anticholinergics cause drowsiness?
A
pathway of basal forebrain nuclei protecting Ach to cortex is blocked
3
Q
what projects glutamate to cortex?
A
thalamus
4
Q
reticular activating system
A
ascending excitatory neurones from reticular formation essential for maintenance of consciousness
5
Q
feedback between cortex and reticular formation
A
positive feedback loop of excitatory signals
6
Q
drawback of EEG
A
low spatial resolution so cant tell where a seizure comes from
7
Q
phenomenon of neurones when deprived of sensory input e.g. seizure/sleep
A
fire synchronously
8
Q
how does sleep help clear extracellular debris?
A
interstitial fluid moves around, clearing amyloid
