Term
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Definition
| Pia Mater, Arachnoid Mater, Dura Mater |
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Term
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Definition
| space between the pia and arachnoid mater; filled with CSF |
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Term
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Definition
| Space between the arachnoid and dura mater; should be empty space |
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Term
| Peripheral Nervous System |
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Definition
| the processes of the CNS, form the cranial nerves, and the spinal nerves |
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Term
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Definition
| Each myelinated neuron is covered by a connective tissue |
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Term
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Definition
| Groups of nerve fibers; covered by perineurium |
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Term
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Definition
| Covering the Fascicles bound together, forming a nerve |
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Term
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Definition
| Skin, skeletal muscle, and bone |
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Term
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Definition
| Smooth muscle, cardiac muscle, glands, and organs |
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Term
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Definition
Connective, supportive cells. supports cells of the CNS
10-50 times more than neurons - microglia(CNS), Macroglia - oligodendrocytes, Astrocytes, Ependymal/Choroidal Cells |
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Term
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Definition
| Conductile matter; functional unit of the nervous system |
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Term
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Definition
| Immune cells of the brain - mononuclear phagocytes (from macrophages) - respond to injury, infection, disease |
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Term
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Definition
| Produce and support myelin in CNS, envelop about 15 axonal internodes |
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Term
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Definition
| Produce and support myelin in PNS, envelop 1 internode - implicated in the ability of the PNS to regenerate after injury |
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Term
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Definition
| Line the ventricles (cavities in the CNS filled with CSF) |
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Term
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Definition
| Line the choroid plexus (collection of vessels within the ventricles that secrete CSF) |
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Term
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Definition
| influence embryonic growth or retraction of neurites; regulate chemical contents in the extracellular space (restrict spread of neurotransmitter, regulate concentration of potassium); form BBB, and glial limiting layer |
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Term
| Glial Limiting Layer (membrane) |
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Definition
| Astrocyte end feet on CNS neurons to regulate nutrient passage |
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Term
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Definition
| Astrocytes form end feet on CNS capillaries inducing tight junction; allows small highly lipid soluble substances through; prohibits passage of large complex objects; select transport of glucose, electrolytes, and amino acids |
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Term
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Definition
| Points on the axon that are not insulated by myelin. Action potential proceeds from node to node (called saltatory conduction) |
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Term
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Definition
| the area that receives the information to be propagated. Produces a graded local signal (based on stimulus intensity) |
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Term
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Definition
| Intensity of the stimulus received on the 1st neuron in the sensory pathway |
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Term
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Definition
| Amount of neurotransmitter releases; on all neurons in the pathway, except the 1st one |
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Term
| Trigger (integrative) component |
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Definition
| the trigger or spike initiation zone is the area of the neuron where the all or none action potential is generated |
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Term
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Definition
| the area responsible for propagating the action potential |
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Term
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Definition
| the area responsible for the release of neurotransmitters. amount released is based on the number and frequency of the action potentials |
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