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Chapter 4

PSY100 Chapter 4 Mind and Consciousness.docx

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Dan Dolderman

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Chapter 4 The Mind and ConsciousnessLocked in syndrome occurs when part of brain stem gets damagedAwake and alert but cannot communicateJeanDominique BaubyBrain imaging allows researchers to see that similar regions of brain activated in coma patient and in healthy patientsHow is conscious mind experiencedOur brains active during sleep even though we are not consciousConsciousness momentbymoment subjective experiences such as reflecting on current thoughts or paying attention to immediate surroundingsIt refers to awareness and experiencesScientists study 2 components of consciousness o Contents of consciousness things we are aware of o Level of consciousness coma sleep wakefulnessAlso focus on things humans do consciouslyspeaking and unconsciously scratchingActivity of neurons produces contents of consciousnessEach content has diff brain activityConsciousness is a subjective experienceCannot know if we all experience world in exactly same wayQuilia word to describe our subjective experiencessuch as perceptionie does color red look the same to everyone who has normal visionWhen people say I know how you feel do they reallyScientists can look at brain activity and determine which object you are looking atbrain imaging Frank Tong 1998 studied relationship bw consciousness and neural responses in brainShowed diff types of sensory info are processed by diff brain regionsparticular type of neural activity determines particular type of awarenessMotor control placed in monkeys who were able to control joystick by thoughtsIn future potentially help paralyzed peopleThere are variations in conscious experienceLimit to consciousnessCannot multitask a lot at onceAutomatic tasks able to do certain things like driving walking wout thinking about itConsciousness and comaPersistent vegetative state when in coma for longer than a monthBrain can process info in this state but cannot respond physicallyThe longer the person in this state the less likely they are to recoverMinimally conscious state between vegetative and full consciousness stateAble to make some movements such as follow object w eyes and try to communicateSplitting the brain splits conscious mindUsed to treat epilepsy by cutting through brain corpus callosum to isolate site of seizure initiationTherefore seizure that begins at site will less likely spread through cortextminimal damageAfter called split brain Visual input images from left side go to brains right hem and images from right side go to left hemLeft hem better w languageRight hem better with spatial relationshipsSplit brain experiment cannot verbalize what is seen but can pick up correct objectSplitting brain produces two half brains each w own perceptions thoughts and consciousnessThe interpreter a left hem process that attempts to make sense of events o Sometimes when patients asked to do something patient does not know why they are doing it because left hem muteThey cannot make connections between 2 hemsUnconscious Processing Influences Behaviour We are aware of some mental processes and not aware of othersSubliminal perception info processed wout conscious awarenessIt refers to stimuli that get processed by sensory systems but bc of their short durations they do not reach consciousnessFrudian slip mistake in which an unconscious thought is suddenly expressed at an inappropriate timeMuch of our behaviours occurs wout awareness or intention
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