States of Concsciousness (hannes)
10 important questions on States of Concsciousness (hannes)
What has EEG data shown about arousal?
Awake:
- High frequencies & low amplitude
- saccadic eye movements
- muscle tone
Asleep
- low frequencies & high amplitude
- no saccadic eye movements
- low muscle tone
REM sleep
- high frenquencies & low amplitude
- saccadic eye movements
- low muscle tone
Which neurotransmitters are linked with Reticular formation
- noradrealine - perception
- dopamine - emotion
- serotonine - sleep
- acetylcholine - memory
What are the 3 aspects of conciousness?
- a state
- a device
- a sensation
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
The three levels of arousal in the brain are modulated by:
- direct MRF activation of the cortex via neuromodulators,
- MRF disinhibition sensory gating
- oscillations of the thalamocortical circuit.
What does EEG over a TMS show?
Connectivity during awake is large
during paradoxical sleep (dream) is moderate
During deep sleep is low
Diagnostic criteria of brain dead
- No reaction, no pupil response, no EEG
BUT: SSEP showed a response to electrical stimulation of the wrist
What does the glasgow coma scale measure?
What causes Locked in Syndrome
- Trauma
- Occlusion (verstopping) of brain stam at basilar artery
At which level of conciousness disorder does connectivity get lost?
How it was shown that patients in Vegetative State sometimes still receive and process information, up to the level of full conscious content?
- patients respond more strongly to its own name (EEG)
- fMRI shows patients can think 'tennis' with approtiate brain pattern for answer 'YES'.
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding