Neurons

• Functional microanatomy of neurons Input zone - in CNS grey matter; in PNS ganglions

  • Dendrites - receives input

  • Cell body - metabolic process

• Conducting zone - in CNS white matter; in PNS nerves

  • Axon - output from cell body

• Output zone

  • Axon terminals (synapses); in CNS

Classes of neurons

• Projection neuron - usually cortical pyramidal - (long axon projects far), often excitatory cell → excite the cell at the terminal; the axon can give local branches. Present in all of levels of the cortex;

• Interneurons - short distance connection - can be excitatory or inhibitory