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31 Cards in this Set

  • Front
  • Back

output of a neuron

single axon

input of a neuron

dendrites

primary function of the the CNS?

processing information

Are there nerves in the CNS?

no nerves just axons

2 major types of cells in the nervous system

1. neurons


2. glia cells

Name 3 types of glia cells

astrocytes


oligodendrocytes


microglia

The CNS is made up of...

brain


spinal cord

The PNS is made up of ....

31 paired spinal nerves


12 cranial nerves


ganglia

What is ganglia or ganglion?

collections of neuron cell bodies in the PNS

2 major functions of the nervous system

somatic


autonomic

Innervates voluntarily-controlled muscles

somatic

innervates involuntarily-controlled smooth muscle, cardiac muscle, glands

autonomic

The autonomic nervous system is divided into 2 divisions

1. sympathetic


2. parasympathetic

Name 6 divisions of the CNS

1. telencephalon


2. diencephalon


3. mesencephalon


4. metencephalon


5. myelencephalon


6. spinal cord

Name the division this item belongs in



Cerebral Cortex

Telencephalon

Name the division this item belongs in



Thalmus and Hypothalmus

Diencephalon

Name the division this item belongs in



Midbrain

Mesencephalon

Name the division this item belongs in



Pons and Cerebellum

Metencephalon

Name the division this item belongs in



Medulla

Myelencephalon

What makes up the brainstem?

medulla, pons and midbrain

What is filled with CSF and houses many blood vessels?

subarachnoid space

Name 3 meninges

dura mater


arachnoid mater


pia mater

Define Nucleus

collection of neuron cell bodies in the CNS; nuclei is plural for nucleus

Define Cortex

"bark" of cerebrum an cerebellum = equivalent of a nucleus

What does gray matter consist of?

nuclei and cerebral cortex

What does white matter consist of?

white matter is a collection of myelinated axons

Define Tracts

a collection of axons with same origin, termination, and function

Commissure

a tract that crosses the midline from one area of CNS to the equivalent (paired) area on the opposite side

Decussation

a tract that crosses the midline from one area of the CNS to a different area on the opposite side

Afferent

fiber bundle input to a nucleus or cortical area

Efferent

fiber bundle output of a nucleus or cortical area