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Lesson 4 - Methods of              physiological responses of                    ConsciousnessMonday, 7 January 2013
Objectives      • Outline limitations to subjective measures to states of consciousness      • Describe and evaluate the m...
From last lesson...... Lesson 3 - Altered states  of consciousness.                               Exam Question    Questio...
Answer                                  Assessor’s Report 2012Monday, 7 January 2013
Psychological construct  A phenomena that is believed to exist but cannot be directly  measured                 We cannot ...
Electroencephalograph (EEG)      The EEG measures electrical activity in the localised      areas of the brain. Electrodes...
Beta               • High frequency, and low amplitude               • Associated with normal waking                     c...
Alpha waves               • High frequency, but slower than beta               • Low amplitude, but slightly higher than B...
Theta waves               • Medium frequency, slower than alpha and                     beta               • Mixture of hi...
Delta waves               • Lowest frequency               • Highest amplitude               • Associated with deepest sta...
Monday, 7 January 2013
EOG An electro-oculargram (EOG) detects, amplifies and records electrical activity of the muscles near the eye.  A high lev...
EMG       EMG (electromyograph) detects, amplifies and       records electrical activity of the muscles in                 ...
Electrocardiograph (ECG)   Measures Heart Rate   In ASC heart rate can vary. For   example, with the use of   stimulants, ...
Galvanic Skin Response (GSR)Measures the electrical conductivity of the skin   GSR may increase or decrease from   normal ...
Thermometer  Measures Body Temperature  Body temperature may increase or  decrease from normal level, indicative  of an al...
Video Camera Monitor and record externally observable (or audio) physiological responses durning sleep     Very little, or...
Essential Learning Activities       Activity 1 - Make a model of brain wave patterns.       For each brainwave pattern you...
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Lesson 4 measuring physiological responses 2013

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Lesson 4 measuring physiological responses 2013

  1. 1. Lesson 4 - Methods of physiological responses of ConsciousnessMonday, 7 January 2013
  2. 2. Objectives • Outline limitations to subjective measures to states of consciousness • Describe and evaluate the methods used to study the level of alertness in normal waking consciousness and the stages of sleep: measurement of physiological responses including; – electroencephalograph (EEG) - electromyograph (EMG) – electrooculargraph (EOG) – heart rate (ECG) – body temperature – galvanic skin response (GSR) • Describe the characteristics of the four brainwaves recorded with EEG recordings • Explain how the measurement of physiological responses can indicate different states of consciousness, including electrical activity of the brain and other physiological responses, including heart rate, body temperature and galvanic skin response. • Describe the characteristics of a beta, alpha, Theta, and delta brainwave in terms of frequency and amplitude • Identify when alpha, theta, and delta brainwaves occur in terms of states of consciousnessMonday, 7 January 2013
  3. 3. From last lesson...... Lesson 3 - Altered states of consciousness. Exam Question Question 3 Two boys, Jason and Eric, were playing football at school. Jason fell to the ground and hit his head. After the fall, Jason was able to speak but seemed confused. Eric wanted to determine whether Jason was experiencing an altered state of consciousness. a. Describe one characteristic of an altered state of consciousness. How could Eric use this to determine Jason’s state of consciousness? 2 marks 2012 VCAA ExamMonday, 7 January 2013
  4. 4. Answer Assessor’s Report 2012Monday, 7 January 2013
  5. 5. Psychological construct A phenomena that is believed to exist but cannot be directly measured We cannot directly measure consciousnessInstead using a range of other measures we can hypothesise about what states of consciousness might be experiencedMonday, 7 January 2013
  6. 6. Electroencephalograph (EEG) The EEG measures electrical activity in the localised areas of the brain. Electrodes are attached to the surface of the scalp and the activity of the brain is measured Brainwaves can indicate an altered state of consciousness. Did anybody see today/tonight episode on this?Monday, 7 January 2013
  7. 7. Beta • High frequency, and low amplitude • Associated with normal waking consciousness and focused attentionMonday, 7 January 2013
  8. 8. Alpha waves • High frequency, but slower than beta • Low amplitude, but slightly higher than Beta • Associated with relaxed mediative stateMonday, 7 January 2013
  9. 9. Theta waves • Medium frequency, slower than alpha and beta • Mixture of high and low amplitude waves • Associated with early or light sleepMonday, 7 January 2013
  10. 10. Delta waves • Lowest frequency • Highest amplitude • Associated with deepest stages of sleepMonday, 7 January 2013
  11. 11. Monday, 7 January 2013
  12. 12. EOG An electro-oculargram (EOG) detects, amplifies and records electrical activity of the muscles near the eye. A high level of electrical activity indicates REM sleep. A low level of electrical activity indicates NREM sleep.Monday, 7 January 2013
  13. 13. EMG EMG (electromyograph) detects, amplifies and records electrical activity of the muscles in Very little or no activity indicates REM sleep. An increase in activity indicates NREM sleep.Monday, 7 January 2013
  14. 14. Electrocardiograph (ECG) Measures Heart Rate In ASC heart rate can vary. For example, with the use of stimulants, the heart rate increase. In other ASC such as meditation heart rate can decrease.Monday, 7 January 2013
  15. 15. Galvanic Skin Response (GSR)Measures the electrical conductivity of the skin GSR may increase or decrease from normal level when an individual’s arousal is heightened or reduced, as in an altered sate of consciousness.Monday, 7 January 2013
  16. 16. Thermometer Measures Body Temperature Body temperature may increase or decrease from normal level, indicative of an altered state of consciousness. For example, in sleep body temp gradually drops when drifting off into deep sleepMonday, 7 January 2013
  17. 17. Video Camera Monitor and record externally observable (or audio) physiological responses durning sleep Very little, or no body movement indicates REM sleep. An increase in movement indicates NREM sleep.Monday, 7 January 2013
  18. 18. Essential Learning Activities Activity 1 - Make a model of brain wave patterns. For each brainwave pattern you must build a model with the materials provided. You then must complete the following: • Identify the brain wave pattern • Describe the brain wave pattern in terms of its frequency and amplitude. For example, high frequency. • Explain what the brainwave is associated with. For example, NWC or ASC.     Activity 2 - Recall Test Hand writtenMonday, 7 January 2013

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