Anatomy Book

Chapter 12

Central Nervous System- brain and spinal cord

Peripheral Nervous System- everything else (ganglion, nerve)

Nervous tissue is made up of neurons and glial. Glial supports the functions of the neurons, and the neurons

Neurons are cells and have extensions (processes). The axon is an extension that connects a neuron to its target. Dendrites are another process (extensions) that receives input from ohter neurons

Gray Matter- Nervous tissue with many cell bodies and dendrites

White Matter- many axons. Insulated by a lipid-rich substance called myelin (so like a membrane)

In the CNS, a loclaized colection of neuron cell bodies (gray matter) is called a nucleus.

In the PNS, a localized collelction of neuron cell bodies (gray matter) is called a ganglion

In the CNS, a bundle of axons (white matter) is called a tract

In the PNS, a bundle of axons (white matter) is called a nerve

Dividing Nervous System Functionally

1st: Sensation (motor functions), Response(motor functions), and Integration (applies sensations to higher thinking like memories, learning and emotion)

2nd: somatic or autonomic

Sensation: Recieving information about the environment to gain input on what is happening outside the body