UWS Anatomy Week 10 Lecture Notes - Nervous System -...

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Introduction to Anatomy Lecture 9 Overview of the Nervous System Describe the anatomy of the CNS and PNS Describe the functional anatomy of the brain, diencephalon, brainstem, cranial nerves, cerebellum & spinal cord Describe how reflexes are produced
What is a nervous system?
The Free Dictionary
What does a nervous system do?
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Main principles of the organisation of the nervous system 1 2 3 4 5 6 7 8
2. PNS Conveys information to & from brain via peripheral nerves
What is the brain?
Nervous System Components Neurons (have axons) Communicators Neurotransmitters at synapses Glutamate, GABA, amines, peptides Glia (no axons) Butlers (astrocytes) Surveillance/protection (microglia) Myelinators (oligodendrocytes, Schwann cells) Cavity liners (ependymal)
Brain basics: CNS consists of grey matter & white matter Grey matter contains neuron cell bodies, dendrites & glialcells (40%) White matteris largely myelinthat surround nerve axons (60%)

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