Psyc 4130 1nd Edition Lecture 15 Outline of Last Lecture I. This is first lecture of new test materialOutline of Current Lecture II. Altered ConsciousnessIII. Sleepa. Field PotentialsIV. Desynchronous Brain Activitya. Beta wavesb. Alpha wavesV. Stages of Sleepa. 1 & 2b. 3 & 4c. 5VI. Focus PointersCurrent Lecture Altered Consciousness- Normal?o Test in afternoon- more awake now?o Are you stressed?o Did you meditate this morning? o Overall… continuum (especially from person to person, and developmentally)o Meaning- some notion that they/it is “aware”o Metacognition: know that you don’t know a higher level math than calculus Ability to evaluate and guide behaviors (demonstrated in rates)o Theory of mind: kid thinks there is marbles/coins in jar examples Sleep- What?o Pattern of activity neutrally distinct, recurrent, diurnal animals (up with sun, dark go to bed)- “Field Potentials”o Neocortical neurons how their acting electrically at one period of timeo Is cortical activity more in synch when you’re awake? NO- “beta waves”These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Desynchronous Brain Activity- Beta Waveso Highest frequency waves are BETA WAVES, lowest in amplitude (importance is frequency) o Range 13-30 Hzo Parietally and frontally- Alpha Waveso Awake and relaxed (not thinking too hard about any one thing)o Frequency decreasing, wavelength increasing o Amplitude goes up a little bit (waves are larger)o 8-13 Hzo Occipitally Stages Of Sleep- 1 & 2o Light sleepo Theta activity/waves indicate increasing synchronyo Prevalent in childhood ADHDo 3.5-7.99 Hzo Stage 1 is Transitional S may alternately open and close eyes Eyes may roll up and down in orbits Stage 2 (S2) normally ensues in about 10 minso Stage 2 Sleep Transition may be accompanied by myoclonus Followed by deep muscle relaxation known as flaccid paralysis Sleep spindles and K complexes appear- SS- spontaneously ~5/min S1-S4o Short bursts…- K complexes- 3 & 4o Deep sleep- aka “slow wave sleep”o Delta activity o Stage 3 Pituitary gland is going to releases highest bursts of growth hormone into bloodstream (helps or prevents you from getting into deep sleep) Melatonin increases growth hormone response Subject may deny having been asleep if awakened prior to S3 Muttering, snoring - 5o R.E.M Sleep/ Paradoxical Sleepo Mainly theta activity then moves to beta o *All based upon EEG datao Fun fact: dolphins dream with half their brain Focus Pointers- EEG waveforms/stageso Esp < 1 Hz delta- REM & the Brain- Narcolepsy (vs)- REM Behavior
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