organization of the nervous system
central nervous system
brain
spinal cord
peripheral nervous system
afferent fiber: sensory neuron
outside& inside
efferent fiber: motor neuron
autonomic fiber
cardiac, enteric nervous system肠神经系统
voluntary skeletal muscle
neuron 3个特征
electrical cell
talk to each other
enormous range of shape and size
neuron organization
cell body=soma
processor
dendrite
axon
info 传输路径 eg.
big toe, brain stem, thalamus, cerebral cortex