Term
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Definition
| patients or animals that have suffered damage to a brain structure |
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Term
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Definition
| Have operation, just don't turn electrode on |
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Term
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Definition
| only reveal major structural damage |
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Term
| Computerized axial tomography (CAT) |
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Definition
| series of x-rays to reveal 3 dimensional brain structure |
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Term
| Positron emission tomography (PET) |
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Definition
| provides functional information; able to observe which parts of brain are active during certain activities |
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Term
| Magnetic Resonance Imaging (MRI) |
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Definition
| provide structural and functional information; less exposure for patient than PET scan |
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Term
| Electroencephalogram (EEG) |
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Definition
| provides electrical functioning information; non-invasive |
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Term
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Definition
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Term
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Definition
| receive information from other neurons; usually short and branched |
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Term
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Definition
| axonal transmission (transmits to other neurons or organs); long in length |
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Term
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Definition
| fatty tissue insulation which speeds conduction; involved in certain degenerative diseases (e.g. multiple sclerosis) |
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Term
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Definition
| gaps in axons; leads to increase in speed of transduction |
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Term
| terminal endings (buttons) |
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Definition
| secrete neurotransmitters |
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Term
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Definition
| gap between two or more neurons |
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Term
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Definition
| respond to external stimulation and transduce (convert) it into electrical stimulation |
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Term
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Definition
| send messages from receptor neurons toward CNS |
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Term
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Definition
| send messages from CNS to muscles and glands |
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Term
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Definition
| connect afferent and efferent neurons |
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Term
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Definition
| measures electrical impulses |
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Term
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Definition
| a neuron "at rest"; inside is negatively charged (-70 mv) relative to the outside |
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Term
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Definition
| value at which an action potential will occur (-55 mv). back to rest is called refractory period |
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Term
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Definition
| lasts one millisecond; electrical impulse travels down axon and reaches terminal endings |
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Term
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Definition
only applies to axonal transmission.
1. once threshold is reached axon will fire
2. stimulus intensity is determined by the # of neurons firing or rapidness |
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Term
| presynaptic membrane (terminal ending) |
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Definition
| contains vesicles with neurotransmitters (chemicals that influence other neurons) |
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Term
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Definition
| gap between terminal ending and dendrite of next neuron |
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Term
| postsynaptic neuron (dendrite) |
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Definition
| receptor cells for neurotransmitters |
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Term
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Definition
| neurotransmitter only affects post synaptic membrane if shape fits into certain receptor molecules |
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Term
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Definition
| enzyme that breaks down neurotransmitters in the synapse |
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