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15 Cards in this Set
- Front
- Back
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stimulus threshold |
the minimum level of stimulation required to activate a particular neuron |
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resting potential |
state in which a neuron is prepared to activate and communicate its message if it receives sufficient stimulation |
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all or none law |
the principle that either a neuron is sufficiently stimulated and an action potential does not ovcur |
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reputake |
the process by which neurotransmitter molecules detach from a post synaptic neuron and are reasonable by a presynaptic neuron so they can be recycled and used again |
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action potential |
a brief electrical impulse by which information is transmitted along the axon of a neuron |
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nerves |
bundles of neuron axons that carry information in the peripheral nervous system |
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autonomic nervous system |
subdivision of the peripheral nervous system that regulates involuntary functions |
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sympathetic nervous system |
branch of the autonomic nervous system that produces rapid physical arousal in response to perceived emergencies or threats |
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parasympathetic nervous system |
branch of the autonomic nervous system that maintains normal bodily functions and conserves the body's physical resources |
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substania nigra |
an area of the midbrain that is involved in motor control and contains a large concentration of dopamine producing neurons |
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cortical localization |
the notion that different functions are located or localized in different areas of the brain; also called localization of functions |
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lateralization of function |
the notion that specific psychological or cognitive functions are processed primarily on one side of the brain |
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aphasia |
the partial or complete inability to articulate ideas or understand spoken or written language because of brain injury or damage |
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functional plasticity |
the rains ability to shift functions from damaged to undamaged brain areas |
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structural plasticity |
the brains ability to change its physical structure in response to learning, active practice, or environmental influences |
