The Brain - Lecture 1

The Brain - Lecture 1 - LECTURE 1 Student Presentation-...

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LECTURE 1 Student Presentation- “Fatal Familial Insomnia” New York Times Magazine, on Sakai, March 26 Nerve Cell= Neuron Cell Body Neucleus, DNA, organelles (mitochondria, endoplasmic reticulum, etc) Dendrites input unit, “antennae” …stick out like trees Retina simple dendrites Cerebellum complex dendrites Hippocampus semi-complex (memories) Axon Output, “telephone wire” Axon terminal is expanded Can be extremely long or extremely short Insulation around the axon Gleal cells provide insulation Allows for more reliable signal to be sent (MS-Multiple Sclerosis- disorder where people’s insulation disappears, they stumble when walking because the signals are not sent out properly Electrical Signals how nerve cells “talk” to each other Signal Direction goes in one way, goes out the other Synapse chemical signal (neurotransmitters) electrical signal Electrical signal in axon gets converted into chemical signal (neurotransmitter) Synaptic vesicles are filled with chemicals that they release
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The Brain - Lecture 1 - LECTURE 1 Student Presentation-...

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