PHYSIOL 201 Lecture Notes - Lecture 6: Peripheral Nervous System, Grey Matter, Auditory Cortex
Document Summary
The peripheral nervous system is information going in to the cns and information coming out from the cns. Afferent travels from the peripheral (can be from anywhere), often called sensory neurons, into the cns. The one receptor picks up information from the peripheral and then the axon projects into the cns. This axon is different than the axons we previously saw. The cell body is somewhere in the middle of the axon. So the information does not come into the cell body. It comes through specialized receptors in the endings. The axon projects all the way to the cell body which is closer to the cns. There can be a various amount of neurons between the afferent and efferent. There can be an afferent neuron that sits directly next to an efferent neuron with no interneuron in between. Depends on the complexity of the information that is being sent and transmitted between the two.
