Dot Point 3 - Physiological Measures Flashcards
What are the draw backs when using physiological measures to measure consciousness?
Hard to identify the participants private experience
(We have to ask)
Physical changes could be due to other factors
E.g illness
What are the benefits of Physiological measures when measuring Consciousness?
Tend to be reliable
Least subjective
Data us consistent and stable over time
Can be cross referenced across different researchers
What are the 3 main devices when measuring physiological measures?
EEG - electroencephalograph
EOG - electro-oculargraph
EMG - electromyograph
What is an EEG and what does it do?
An EEG is an electroencephalograph and it detects, amplifies and record electrical activity of the brain.
What is an EOG and what does it do?
An EOG is an electro-oculargraph and it detects, amplifies and records electrical conductivity of the muscles surrounding the eyes.
What is an EMG and what does in do?
An EMG is an electromyograph and it detects, amplifies and records electrical conductivity of the muscles,
It indicates both muscle tone and activity
And EEG also
Measures the amplitude and frequency of our brain waves
What is the amplitude of a brain wave?
The amplitude refers to the size or height of the wave
What is the frequency of a brain wave?
The frequency refers to the number of waves per second
What is the order of your brain waves as you fall asleep?
BATD beta Aloha Theta Delta
Beta
- NWC
- high frequency
- low amplitude
Alpha
- drowsy/relaxed/meditating
- high frequency (lower than beta)
- low amplitude (higher than beta)
Theta
- early stages of sleep
- medium frequency
- mixed amplitude
Delta
- deep sleep
- low frequency
- high amplitude
What is a polysomnogram ?
When the devices combine together in a continuously moving chart
What are other physiological measures?
Heart rate
Body temp
Galvanic skin response
Heart rate
- measured by a an electrocardiogram ( ECG) as it detects, amplifies and records electrical conductivity of the heart muscles,
It’s measured in beats per minute
Body temp
Temperature is linked to alertness
Measured during sleep by recording temperature of skin on your fingers
Galvanic skin response
Measures the electrical conductivity of the skin
As skin becomes more moist (perspires) this increases the conductivity
The increase in NWC compared to when relaxed or in some ASC’s where it decreases
