SCARTELI PSYCH NOTES 09 28 Part 2 of Nervous System Notes Hindbrain Cortex Or the Neo brain Outer covering densely packed neurons 85 of weight is made up of this 20 billion or more neurons 300 trillion connections To hear to think to see to understand Corticalization Wrinkling of cortex Involved higher thought processes interpretation of sensory input Allows larger of cortical cells to exist in small space inside the skull Allows for more complicated connections See Blackboard Learn for chart The more we are learning the more we are adapting Cerebal Hemispheres 2 Sections of cortex Left Right Corpus Callosum THICK band of neurons Connects R L communication Know lobes functions dysfunc Occipital Lobes Rear bottom Processes info from skin internal body receptors for touch temperature body positions possibly taste Contains neurons responsible for sense of hearing understanding meaningful speech Contains visual centers Primary Visual Cortex Processes visual info Visual Assoc Cortex ID Makes sense of visual info Parietal Lobes Top AND back Somatosensory Cortex Area of neurons running across the front Temporal Lobes Primary Auditory Cortex Processes auditory info Auditory Assoc Cortex IDs makes sense of auditory INFO Frontal Lobes Front Top Includes Motor Cortex Responsible for HIGHER mental porces like descion making persona Responsible for productions of fluent speech Sends motor commands to muscles of somatic nervous system Output Motor Cortex Left Side Mirror image in charge of voluntary muscles Have MOST control over it Brain 1 3 of muscles to work it Controls Connects Hip Brow Ankle Knee Eye Toes Trunk Face Motor Signals Arm Hips Wrist Jaw Fingers Tongue Thumb Swallowing Neck See Blackboard Learn for visual chart Input Somatosensory Cortex Right Side Controls Connects Trunk Hip Knee Leg Foot Toes Genitals Sensory Neck Arm Head Finger Thumb Eye Nose Face Lips Teeth Gum Jaw Tongue Association Areas Brain based language common problem Aphasia Ex Stroke Broca s Aphasia Responsible for coordination interpretation of info for higher mental processing Damage to Broca s area Usually in Left Frontal Lobe Understand what s said but CAN T form fluent responses Ex Halts Gaps Mispronounces Not just oral motor issue otherwise could write
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