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Pyramidal neuron

A type of neuron found in the hippocampus or cortex.

Purkinje neuron

A type of neuron found in the cerebellum.

Pseudounipolar neuron

A type of neuron typically found in the spinal cord.

Multipolar neuron

Also known as a motor neuron, it has multiple processes extending from its cell body.

Microglia

The dark red glial cells involved in immune defense in the CNS.

Oligodendrocytes

Blue glial cells that provide insulation to axons in the CNS.

Astrocytes

Green glial cells that provide structural support and nutrition in the CNS.

Ependymal cells

Pink glial cells that line the ventricles of the brain and help produce cerebrospinal fluid.

Cooking

The process that allows humans to support their large brains and neuron count compared to apes.

Cerebellum

The brain region most studied by Golgi and Cajal.

Black reaction

A staining method that allows specific neurons to be visualized in detail.

Nerve net

The type of nervous system found in the Hydra.

GI tract

Where a similar arrangement of nerves is found in humans as in the nerve net of Hydra.

Cambrian Explosion

An important evolutionary event that occurred 600 million years ago.

Cephalization

The trend observed in evolution towards a more centralized nervous system and body plan.

Soft tissue decay

The reason it has been challenging to study the evolution of the nervous system.