Types of Neurons by Structure - Neuroanatomy Basics - Anatomy Tutorial

Summary

This tutorial explains the three main classifications of neurons based on their structure: unipolar, bipolar, and multipolar, including a special focus on pseudo-unipolar neurons found in humans.

Highlights

Unipolar and Pseudo-Unipolar Neurons00:00:27

Unipolar neurons have only one process and are found in invertebrates. Humans have pseudo-unipolar neurons, which have one process that then splits into two axonal branches. These are exclusive to sensory neurons and lack dendrites. An example is a sensory neuron from a dorsal root ganglion transmitting sensation from the periphery to the spinal cord.

Bipolar Neurons00:03:02

Bipolar neurons have two processes extending from the cell body: one axon and one dendrite. They are less common and found in specific areas like the olfactory epithelium and the retina.

Multipolar Neurons00:03:49

Multipolar neurons are the most common type, accounting for most neurons in the body. They have one axon and several dendrites.

Anaxonic Neurons00:04:13

Anaxonic neurons lack axons and therefore cannot produce action potentials. Instead, they undergo local or graded potentials.

Summary00:04:42

The basic classification of neurons includes unipolar (or pseudo-unipolar in humans), bipolar, and multipolar types.

Introduction to Neuron Classification00:00:07

This video will cover the three main types of neurons: unipolar, bipolar, and multipolar neurons.