Chapter 3 - Methods of Studying Consciousness Flashcards Preview

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Flashcards in Chapter 3 - Methods of Studying Consciousness Deck (19):
1

Study of Consciousness

Consciousness is a psychological (hypothetical) construct - it is believed to exist but cannot be directly observed or measured. Much of what is known is inferred or assumed.

2

DARE

DARE

  • Detect
  • Amplify
  • Record
  • Electrical (activity)

3

What is and EEG?

DARE activity of the brain in the form of brain waves

4

What is an EMG?

DARE activity of the muscles

5

What is and EOG?

DARE activity of muscles that control eye movement

6

Other Instruments used to measure sleep?

  • Body Temperature
  • Heart Rate
  • Galvanic Skin Response (GSR)
    • Electrical conductivity of the skins surface
  • Respiration Rate
  • Blood Pressure

7

Brainwave frequency

number of brainwaves a second

(measured in Hertz/Hz)

8

Brainwave Amplitute

How high the brainwave goes

(height of peak and troughs on a brainwave graph)

9

What is Polysomnography?

The detailed monitoring and recording of physiological responses during sleep

10

What are Beta Waves?

Description: High frequency brainwaves and low amplitude

Association: typical brainwave pattern during NWC (alert and active)

 

 

11

What are Alpha Waves?

Description: Reasonably high frequency and low amplitude

Association: typical brainwave pattern when awake but very relaxed, very drowsy and about to fall asleep (i.e. daydreaming). Eyes are often closed.

12

What are Theta Waves?

Description: Medium frequency and mixed amplitude

Association: typical brainwave pattern during the early stages of sleep. Also seen in young children and psychopaths, may be caused by frustration.

13

What are Delta Waves?

Description: A steady pattern of low frequency and high amplitude waves

Association: typical brainwave pattern associated with NREM deep sleep. Also seen in babies and adults with brain tumors.

14

What are K-Complexes?

The sharp rise and fall in amplitude, lasting for about 2 seconds

15

What are sleep spindles?

Periodic bursts of rapid frequency which are indicative of stage 2 NREM sleep.

16

What are sawtooth waves?

Random, fast waves that are slightly bigger than alpha waves. They resemble waves for being awake but occur among the beta-like waves during REM sleep.

17

What is and ECG?

DARE the electrical activity of heart muscles.

18

Brainwaves Summary

  • Beta Waves (Awake)
  • Alpha Waves (NREM)
  • Theta Waves (NREM)
  • Delta Waves (NREM)
  • Sawtooth-beta like waves (REM)

A image thumb
19

What is a sleep lab?

A place used for scientific research on sleep. Usually resembles a bedroom in order to reduce the effect of an  artificial environment.