PSY 401 1st Edition Lecture 17 Outline of Last Lecture I Early Neuroscience Brain Localization a Pierre Flourens i Action Commune 1 Phineas Gage b Karl Lashley i Rat Studies c Paul Broca i Patient tan ii Expressive Aphasia iii Broca s Area d Carl Wernicke i Wernicke s aphasia e Fritsch and Hitzig i Stimulation of motor cortex ii Contralateral brain body relationship Outline of Current Lecture I II Early Neuroscience Brain Localization a Fritsch and Hitzig i Stimulation of motor cortex ii Contralateral brain body relationship Early Neuroscience Layout of the Nervous System a Camillo Golgi 1843 1926 i Nerve cell Staining ii Reticular Theory b Santiago Ramon y Cajal 1852 1934 i Neuron Theory Current Lecture I Early Neuroscience Brain Localization a Fritsch and Hitzig i Stimulation of motor cortex 1 Homunculus 2 Extreme localization of function These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II a If a certain part is stimulated you WILL move that part of your body deterministic b Borders of certain areas can blend together because an individual uses one area so much it becomes very strong when you stimulate areas around it that area will be stimulated too because it has spread to those other areas ii Contralateral brain body relationship Early Neuroscience Layout of the Nervous System a Camillo Golgi 1843 1926 i Nerve cell Staining 1 More accurately observe neurons and connections 2 Argument of the existence of synapses 3 Golgi stain increased resolution of slices of nervous tissue less percent of cells stained allowed for better resolution ii Reticular theory Nerve cells are physically connected to each other nerve net 1 No visible gaps 2 Fast reflexes connection makes them faster b Santiago Ramon y Cajal 1852 1934 i Neuron Theory nerve cell are independent separated by a narrow gap 1 Communication via chemicals traversing gap Today is a synapse 2 Neural connections and intelligence a The number of connection rather than the number of neurons as previously believed is related to intelligence b Practice something increase the number of connections between neurons
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