PSYC 3250 Chapter Notes - Chapter 2: Fourth Ventricle, Neuroplasticity, Chemical Synapse
26 Oct 2013
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Cortical electrical-stimulation mapping: developed mid-20th century by wilder penfield, neurosurgeon (mapping locations of functions in brain allowed for removal of diseased brain tissue w/o harming other brain regions. Nervous system composed of mostly nerve cells, also called neurons arranged into neural circuits. Neuron receives input from other neurons, integrates input and distributes processed info to others. Brain integrates info by assembling 100-150 billion of info units into array of circuits. Glial cells less impt than neuron, b/c neuron produce readily measured electrical signals. Camillo golgi- continuous neurons: endless network of connected tubes through which info flowed. Ramon cajal- contiguous neurons: neurons close together but gaps exist. Neuron doctrine: (1) brain composed of separate neurons and other cells that are independent structurally, metabolically and functionally (2) information is transmitted from cell to cell across tiny gaps (charles. Sherrington called these synapses, 10^15 of them in brain) The neuron has 4 structural divisions specialized for information processing.
