Term
| What is the role of the CNS? |
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Definition
| Is the location for conscious and unconscious processing of sensory information, planning and execution of motor behavior, and higher cognitive function |
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Term
| What is the General Organization of the Brain? |
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Definition
Cerebrum - Cerebral Cortex, Basal Ganglia
Cerebellum
Brainstem - Midbrain, Pons, Medulla |
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Term
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Definition
| The embryological process that creates the neural tube, forming the three primary divisions |
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Term
| What are the 3 major embryonic divisions? |
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Definition
Prosencephalon - Telencephalon, Diencephalon
Mesencephalon
Rhombencephalon - Metencephalon, Mylencephalon
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Term
| What are the two types of CNS tissues? |
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Definition
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Term
| What is characteristic of Gray Matter? |
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Definition
| Contains cell bodies or neurons and glia as well as neurophil. Can form a thin layer (cortex) or larger aggregates (nuclei). |
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Term
| What is characteristic of White Matter? |
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Definition
| Composed of myelinated nerve fibers |
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Term
| What is the protective covering layer on CNS tissues called and what are the layers of it? |
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Definition
Meninges
Dura - Outer
Arachnoid - Middle
Pia - Inner |
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Term
| What is the Choroid Plexus? |
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Definition
| Formed in several regions of the brain where the brain tissue is so thin that pia and ependyma come into contact and blood vessels invade, forming a rich capillary bed that is the source of cerebral spinal fluid. |
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Term
| What is the predominant type of CNS neuron? |
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Definition
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Term
| What is Projection, or Golgi Type I neuron? |
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Definition
| Neuron that possesses a long axon, longer than the diameter of the dendritic tree, which carries local informationaway from the local area |
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Term
| What is a Interneuron, local circuit neuron, or Golgi Type II neuron? |
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Definition
| Possesses a short axon and is involved in local integration and modulation of function. |
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Term
| What are Oligodendrocytes? |
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Definition
| Produces myelin within the CNS to insulate axons. |
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Term
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Definition
| Provide nutritional support, regulate the microenvironment, and help form the blood brain barrier. |
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Term
| What are the two types of Astrocytes? |
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Definition
Fibrous Astrocytes - Found in white matter
Protoplasmic astrocytes - Found in gray matter |
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Term
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Definition
| Perform phagocytosis to remove debris following injury. |
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Term
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Definition
| Neuroepithelial cells that form the ventricular lining |
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Term
| What is the CNS neuronal and glial response to injury? |
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Definition
- Mature neurons do not divide in response to injury
- Severed axons can regenerate if the cell body divides
- Glial cells do proliferate in response to injury and form scar tissue in a process called gliosis
- Nerve fiber rengeneration occurs much more effectively in PNS than CNS |
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