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Action potential
A brief change in a neuron's electrical charge.
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Cerebral cortex
The convoluted outer layer of the cerebrum.
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Left Hemisphere
Usually handles verbal processing, language, speech, writing
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Right Hemisphere
Handles nonverbal processing, including visual-spatial and musical tasks, and perception of others emotions
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Dendrites
Branching structures that receive signals from other cells
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Axon
Fiber that carries signals away from soma to other cells
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Myelin sheath
Insulating materiel that encases some axons
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Resting Potential
Neurons stable
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Action Potential
Voltage spike that travels along axon
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Absolute refractory period
Brief time after action potential before another action potential can begin
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All-or-none law
A neuron either fires or doesn't fire
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Neurotransmitters
Chemicals that transmit information from one neuron to another.
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Reuptake
A process in which neurotransmitters are sponged up from the synaptic cleft by the presynaptic membrane.
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Synaptic cleft
A microscopic gap between the terminal button of a neuron and the cell membrane of another neuron.
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Mirror neurons
Neurons that are activated by performing an action or by seeing another monkey or person perform the same action
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Antagonist
A chemical that opposes the action of a neurotransmitter.
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Synapse
A junction where information is transmitted from one neuron to the next.
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Mean
The arithmetic average of the scores in a distribution.
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Median
The score that falls exactly in the center of a distribution of scores.
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Mode
The score that occurs most frequently in a distribution.
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Correlation coefcient
A numerical index of the degree of relationship between two variables.
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Standard deviation
An index of the amount of variability in a set of data.
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