Term
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Definition
| the production of new cells. |
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Term
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Definition
| The movement of cells after they have differentiated as neurons/glia. |
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Term
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Definition
| When a primitive neuron (which looks like any other cell) grows its axon and dendrites. |
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Term
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Definition
| basic cells able to renew themselves. Stem Cells in the nose remain immature throughout life. |
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Term
| Nerve Growth Factor (NGF) |
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Definition
| A protein that promotes the survival and growth of the axon. An axon dies without NGF, as does its cell body. |
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Term
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Definition
| A programmed mechanism in which the cell kills itself. Apoptosis is canceled by NGF. |
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Term
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Definition
| A chemical that promotes the survival and activity of neurons. |
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Term
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Definition
| A condition marked by hyperactivity, impulsiveness, diffuclty maintaining attention, varying degrees of mental retardation, motor problems, heart defects, and facial abnormalities. The person's dendrites are short with few branches. |
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Term
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Definition
| Fingers become clumsy, easily fatigued, and make involuntary movements. (Musician's Cramp) |
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Term
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Definition
| A sharp blow to the head resulting from an accident, assault, or other sudden trauma that does not actually puncture the brain. |
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Term
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Definition
| A temporary loss of blood flow to a brain area during a stroke, also known as a cerebrovascular accident. |
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Term
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Definition
| the result of a ruptured artery (bleeding). |
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Term
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Definition
| the result of a ruptured artery (bleeding). |
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Term
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Definition
| The more common type of stroke in which a blood clot or obstruction occurs in the artery. |
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Term
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Definition
| Accumulation of fluid which increases pressure on the brain and increases the probability of additional strokes. |
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Term
| Tissue Plasminogen Activator |
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Definition
| (tPA)a drug which breaks up blood clots. Given to stroke patients and is most effective when administered within 3 hours of the stroke. |
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Term
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Definition
| The region surrounding the immediate damage from a stroke. When it is too late for tPA, the penumbra can still be saved. |
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Term
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Definition
| The decreased activity of surviving neurons after damage has occurred to other neurons. |
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Term
| Denervation Super-sensitivity |
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Definition
| Heightened sensitivity to a neurotransmitter after the destruction of an incoming axon. |
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Term
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Definition
| The heightened sensitivity as a result of inactivity by an incoming axon. |
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Term
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Definition
| a continuing sensation of an amputated body part. |
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Term
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Definition
| When a limb loses its sensory input (afferent input). |
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