7 Imaging the Brains Activity Notes Copy.pdf - 7 Imaging the Brains Activity Portrait AngeloMosso changes in bloodflowindicate behaviour electrodes on

7 Imaging the Brains Activity Notes Copy.pdf - 7 Imaging...

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7 Imaging the Brains Activity Portrait Angelo Mosso changes in blood flow indicate brain function during mental activity behaviour electrodes onpatients brain and arms solved a math problem blood pressure in brain9 in arm nothing 7 I Recording the BrainsElectrical Activity ActionPotential Single cell Recordings tells what each neuron in brain is doing c any given moment electrode inserted directly into brain not really done on humans mainly on animals VISION cats auditory function barnowl spatial memory rats reaching primates Grandmother cells Information coding in visual pathways visual cortextakesinto encoded as dots transfer them as bars transfers them as complex representations of what world looks like Graded Potential Electroencephalographic Recording EEG ElectricalBrain Graphs graph that recordselectrical activity through skull and reps graded potentials for many neurons records sum of rhythmical graded potentials depolarizations t hyper polarizations 1 Big signal Synchronous Activity
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State of consciousness Beta wave low amplitude 1 wave height high frequency fast brain activity anywhere on skull of an alert person Alpha wave calm resting eyes closed rhymical larger slower brain waves visual cortex c backof head Deltawave slow brain activity deepsleep Brain Injury Epilepsy Epilepsy changed sensation mood consciousness Yor convulsions primary symptom areseizures 7 10 Of pop has had seizures epileptics haveseizures generated by their own brain dysfunction l l Of pop difficult to diagnose GeneratpilepsyParhdEpilepsy involves entire brain not entire brain 1 Grand Mal i simple can spread loss of consciousness equilibrium symptoms primarily sensory motor or TONIC Clonk CONVULSIONS both rigidity
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