Only pressure has an identifiable receptor pain

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Only pressure has an identifiable receptor Pain Nociceptive pain   associated with skin damage Explained by “gate theory”   spinal chord allows or denies pain Controlled by endorphins Congenital Insensitivity to Pain with Anhidrosis   CIPA INSERT LOST NOTES HERE Conscious & Two track Mind Consciousness – awareness of ourselves and our environment           wakefulness or  awareness Minimal consciousness – barely awake or aware Moderate consciousness – in between area Preconscious   accessible but not aware Know someone’s name but can’t retrieve it Sleep and dream Full consciousness - mindful Totally know what’s going on Attention
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Focusing consciousness Selective on a particular stimulus Cocktail party effect   filter out unnecessary info Inattentional blindness Failure to notice unexpected objects in the environment (change blindness) Sleeping & Dreaming Sleep and Circadian Rhythm Biological processes that occur regularly on a 24 hour cycle Suprachiasmatic Nucleus (SCN)   inner time clock Pineal gland   melatonin   drowsiness Measuring Sleep Brain activity   EEG Muscle tension   EMG Eye movements Sleeping Stage 1 Light sleep, easily awakened Stage 2  Sleep spindles, burst of brain activity Stage 3 Transitional stage, waves slow down
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Stage 4 Deepest sleep, happens early Stage 5 (REM) Increased heart rate, BP, and breathing Eye movements, genitals aroused Major muscles appear to be paralyzed Dreams!   vivid and easiest to remember Full cycle repeats itself every 90 minutes Sleep debt – amount of sleep our brain owes our body Sleep deprivation Impaired concentration & fatigue Weight gain Depressed immune system Why do we sleep? Protection in general (more alert) Growth Memory consolidation Protection against cellular damage Sleep Disorders Insomnia – problems falling and/or staying asleep Hypersomnia – people sleep 10+ hrs/day for 2 weeks or more Narcolepsy – Excessive daytime sleeping, loss of control Sleep Apnea – stop breathing during sleep
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Dreaming Most dreams involve negative events or emotions Also common for most to contain day’s experiences Psychoanalytic Theory Dreams represent unconscious wishes Latent content of dreams  manifest content of dreams Freud! Dream-for-Survival Theory Dreams permit information that is critical for our daily survival to be reconsidered during  sleep Activation-Synthesis Theory Brain promotes random neural activity & dreams try and make sense of this activity Hypnosis Trance-like state with heightened susceptibility to the suggestions of others Wide variation (spectrum) of susceptibility Useful for 
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