Chapter 6 Consciousness
introduction and the functions of consciousness
consiousness: moment by moment awareness of ourselves, our thoughts and our environment.
introspection: the process of looking withing to observe one's own thoughts, beliefs, and feelings.
the cognitive unconscious
unconscious inference: the perceptual world as you consciously experience it.
cognitive unconscious: the mental support processes outside awareness that make out perception,
memory and thinking possible.
brain damge and unconscious functioning
anterograde amnesia: a profound disruption of memories. usually caused by damage in or around the
hippocampus. people with this appear to be almost normal on tests of implicit memory ( memory that
is seperate from conscious awareness
blindsight: the ability of a person with a lesion in the visual cortex to reach toward or correctly guess
about objects in the visual field even though the person reports seeing nothing.
the neural basis for consciousness
the mind body problem
mind body problem: the difficulty in understanding how the mind and body influence each other, so
that physcial events can cause mental events, and so that mental events can cause physical ones.
the many brain areas needed for consciousness
reticular activating system: a system that controls the overall arousal level of the forebrain and that also
helps control the cycling of sleep and wakefullness.]
neural correlates of consciousness
neural correlates of consciousness: specific brain states that seem to correspond to the content of
someone's conscious experience.
readiness potential: recording of brain activity that almost a half second before participants reported
any awareness of a decision to move.
the global workspace hypothesis global workspace hypothesis: a hypothesis about the neural basis of consciousness. it proposes that
specialized neurons, called workspace neurons, give rise to consciousness by allowing us to link stimuli
or ideas in dynamic, coherent representations.
varities of consciousness
examples: sleep, anesthesia, hypnosis, religous practices can too sometimes, drugs,
circadian rhythm: sleep wake cycle. controlled by 20000 cells located in the hypothalmus. These cells
are responsible for controlling rhythms in the body, including rhythm of arousal increases and decreases
spanning a rough 24 hour period.
sleep and wake cycles
alpha rhythm: a pattern of regular pulses, between 8 and 12 per second, visible i nthe EEG of a person
who is relaxed but awake and typically has their eyes closed.
beta rhythm:the rhythmic pattern in the