PSYCH 2NF3 Chapter Notes - Chapter 4: Tetraodontidae, Autoimmune Disease, Tetrodotoxin
6 Mar 2014
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Chapter 4- the structure and electrical activity of neurons. Epilepsy- discharges of abnormal electrical activity in the brain interfere with normal movements, thought and consciousness. Ultra thin wires inserted in temporal lobe to indicate epileptic discharges by recording electrical activity of neurons through the wires uninsulated tip. Each wire could also record act of neurons nearby. This single-celled recording technique- reveal how single neurons code info and contribute to conscious behaviour. Grandmother cells- we have separate neurons for detecting and representing every object. Dendrites- increase cells s. a- further increased by dendritic spines. Axon extends out of cell body known as cell hillock. Axon may have branches called axon collaterals- emerge at right angles. Toward end, axon may divide into smaller branches-teleodendria. End of each teleodendrion is a terminal button. Synapse- space between where a terminal button sits very close to a dendritic spine of another neuron but doesn"t touch. Neuron is both info collecting and info processing device.
