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29 Cards in this Set

  • Front
  • Back
according to brodman about how many cortical areas does each hemisphere contain?
which is the dominant hemisphere for language in most people?
-left hemisphere
what are polymodal perception areas and what areas are they?
-create perceptions involving more than one sensory modality
what cortical areas are important for planning and performance of motor behavior?
-the premotor cortex (rostral to the primary motor ctx)
what is wernickes area important for?
-speech comprehension
what is brocas area important for?
-language expression
how does info get from wernickes to brocas area?
-thru the arcuate fibers
what areas contribute to anterograde memory?
-hippocampus and amygdala
what areas are involved in creative or original thinking?
-prefrontal areas
what areas are involved in personality, motivation, emotional state, and arousal?
-midline frontal lobe areas
what areas are involved in judegement, decision making, and social conduct?
-medial and inferior surfaces of the frontal lobes
in what area does most sensory perception occur?
-posterior hemisphere
in what area does most motor and language perception occur?
-central hemishpere
in what area does most learning, thinking, emotion, personality occur?
-anterior and medial hemisphere
what is required for conciousness?
-activity in the cerebral cortex
-conciousness cant be explained by the substance of the brain
electrical activity theory
-conciousness is an emergent property of electrical activity in the brain/ctx
global spatial theories
-conciousness is an emergent property of large, diffuse groups of neurons
-not possible to localize conciousness to activation of specific neurons
local spatial theories
-conciousness emerges from activity in particular subsystems of neurons that can be localized
temporal theories
-conciousness emerges from large numbers of interconnected parts of ctx whose activity is synchronized and oscillating at the same frequency
cortical matrix processes
-conciousness is the physical processes of the brain
what does blindsight illustrate?
-that there can be a level of recognition without a level of awareness
-inability to recognize faces
-results from temporal lobe damage
-awareness without recognition
what characterizes an awake, desynchronized EEG pattern?
-low amplitude voltage
-high frequency
-beta waves
what characterizes an asleep, synchronized EEG pattern?
-high amplitude voltage
-low frequency
-delta waves
-associated with deep sleep
what are typical EEG patterns of comatose patients?
-deep coma=flat in both hemispheres
-less deep=high amplitude and low frequency
what are the criteria for brain death?
-EEG having no waves greater than 2uV amplitude that is irreversible
reticular activating system is important for what?
-activity here is important for EEG desynchronization
what three things does the RAS consist of?
-cholinergic cells in LDT and PPT nuclei
-serotonergic cells in the raphe nuclei
-noradrenergic neurons in the locus ceruleus