NSCI 1001 Lecture Notes - Lecture 1: Peripheral Nervous System, Hindbrain, Substantia Nigra
15 Feb 2019
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Document Summary
The nervous system: a set of intercommunicating cells that are exquisitely organized. -brain and spinal cord (nerves will not regenerate) Autonomous nervous system: sympathetic (fight/flight), parasympathetic (rest and digest) 80 billion neurons, and an even higher number of non-neuronal cells. The brain represents 2% of our body mass, but consumes 20% of the body"s energy. To integrate the information received by the environment (through the sensory organs) and itself. To elaborate different biological responses that are executed by other organs (glands and muscles) Individual cell: neuron (likened to an individual person) Collection of neurons: nucleus (likened to a house of people) Collection of nuclei: region (likened to a city) Neuron includes: dendrites (recieves info), soma (cell body), axon (connected to cell, transports info) Bones that help protect the brain: frontal, parietal, sphenoid, temporal, occipital, ethmoid. The meninges: protection for the brain (membranes covering the brain/spinal cord) Indication of intelligence, provide a larger surface area.
