Ch4_ppt_-_Brain_and_Behavior_Compatibility_Mode_

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Unformatted text preview: coordinates establishing emotional memories memories 4 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 Cerebral Cortex (crown of the brain): the outermost layer of the human human brain (80% of brain tissues); essential for human of functioning functioning Fissures divide each hemisphere into 4 lobes: divide lobes: Motor Motor Cortex Somatic Sensory Cortex controls controls >600 voluntary body movements muscles receives receives sensory input that gives rise rise to our sensations 5 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 Speech comprehension & production in left hemisphere production of speech thru its connections w ith motor cortex region that controls speech muscles & speech comprehension Association Cortex (3/4 brain area) (3/4 mental functions: mental perception, language, memory & thought (increases with developed species); accounts for higher mental accounts activities activities Agnosia inability inability to identify familiar objects information sent information to visual cortex cannot be connected with information stored stored in other cortical areas 6 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 Frontal Lobe The human difference; hardly exists The in mammals; makes you the civilized person person you are Self awareness, planning, initiative, Self & responsibility + emotional experiences experiences Damage 1)can’t plan, act, or correct actions, can’t OR OR 2) apathy Prefrontal Cortex Seat of executive functions (goal setting, planning, judgment, Seat impulse control,…) direct behavior adaptively Damage oblivious to future consequences, e.g. capacity to kill oblivious capacity Hemispheric Hemispheric Lateralization relatively relatively greater localization of a function in either hemisphere Corpus callosum: neural bridge of white myelinated fibers acting as a major linkage linkage between between both hemispheres enabling both to work as a single unit Left: Left: verbal abilities, speech, math math & logical abilities; positive emotions Damage (Wernicke’s & (Wernicke’s Broca’s areas) Aphasia (partial (partial or total loss of ability to recognize meaning or communicate communicate verbally) Right: perceiving perceiving spatial relations, mental imagery, musical & artistic abilities; negative emotions emotions Damage can’t Damage can’t recognize faces faces or patterns… Corpus Corpus callosum callosum 7 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 Despite Despite Laterization, our brain normally functions as a unified whole the the 2 hemispheres communicate with one another through the corpus callosum e.g. e.g. visualizing your hands But what happens if this link is broken?? 8 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 The Split Brain (Roger Sperry, 1970s) Picture Picture flashed on right side right verbally describe & write verbally it (left hemisphere is language language rich side) LR The Split Brain (Roger Sperry, 1970s) Flashed left Flashed on left side: cannot describe or write cannot it (expressive abilities are under developed under-developed in right h...
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