Classification and types of Neurons

Nervous system

Neurons are classified by their what?

By their Function and Structure

Function of Sensory Nerons

Carry info across afferent pathway towards CNS

Function of Interneurons

Perform integration within CNS

Integration=Info processing

Function of Motor Nerons

carry response to effector down efferent pathway from CNS

Sub classifications of Motor Neurons

• Somatic MN - voluntary - skeletal MT

• Antonomic MN - Involuntary - smooth and cardiac MT and glands

Sub classifications of Antonomic MN

• Sympathetic-fight or flight (excitatory response)

• Parasympathetic-Rest and digest (Relaxation)

Steps to identify Structural Classification

1. Find Soma (cell body)

2. Count Number of projections directly from soma.

3. Name Unipolar, Bipolar, or Multipolar

What does Unipolar mean?

1 projection off soma

typically, afferent

What does Bipolar mean?

two projections directly off of soma

pretty rare only Eyes and Ears

What does Multipolar mean?

Multiple projections directly off soma

Most common in efferent and CNS