Linfield Reading Notes 108-117

Linfield Reading Notes 108-117 -...

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Linfield Reading Notes p.108-117 22:23 Brain Consistency of gelatin Weighs 3 pounds So complex About 160 trillion connections in the human brain Neurons Nerve cells specialized for communication with each other Workings of brain depend on cross-talk among neurons Our brains contain about  100 billion neurons Biological Psychologists or Neuroscientists Scientists who study the brain and behavior Central Nervous System (CNS) Composed of the brain and spinal cold Sensory info comes in and decisions to act go away from Divided into: o Forebrain o Brain Stem o Spinal Cord
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Peripheral Nervous System(PNS) All the nerves that extend outside of CNS Further divided into the somatic nervous system which controls—behavior,  automatic nervous sytstmem Forebrain: Forward part of brain Aka cerebrum Most highly developed area in brain Largest component of forebrain is : Cerebral Cortex o Contains 12 to 20 billion neurons o Outermost part of forebrain o Analyzes sensory info o Responsible for our higher brain functions o Ability to think talk and reason Parts of the Cerebral Cortex: o Neocortex: Recent addition  Accounts for majority of cerebral cortex Attains a larger size in proportion to our bodies More cortical areas and connections than other species o Divided into 2  cerebral hemispheres:
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They look alike but serve different functions Corpus Callosum: Band of fibers that connects the 2 cerbral hemispheres o Four Lobes: Frontal Lobe: Forward part of cerebral cortex Contains motor cortex and prefrontal cortex Responsible for: motor function, language, and memory, and  executive function (overseeing other mental functions) Parietal Lobe Upper middle part of cerebral cortex Behind frontal lobe Somatosensory cortex—lies next to motor cortex Devoted to touch Sensitive to pressure, temp, and pain Plays roles in many kinds of  perception Spatial perception—most frequently associated with upper part of  parietal lobe Other functions: Perception of object shape and orientation, perception of other 
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Linfield Reading Notes 108-117 -...

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