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- Glossary
Threshold potential
In order for an action potential to be triggered, the membrane potential at the axon hillock of a neuron must exceed the threshold value of approximately –50 mV (relative to the resting potential of –70 mV). This is the threshold potential. If the depolarization remains below this threshold, no action potential is triggered.
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- Glossary
Extrapyramidal system
The extrapyramidal system refers to a series of structures in the brain that play a key role in influencing motor function but are not part of the pyramidal tract. It consists of multisynaptic neuron chains. The extrapyramidal system includes numerous nuclei such as the striatum, pallidum, nucleus ruber, and substantia nigra.
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- Glossary
Resting potential
The membrane potential of a neuron at rest. The inflow and outflow of ions are in equilibrium. It ranges from –50 to –100 mV.
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- Glossary
white matter
The white matter refers to the myelinated fibers of the nervous system that connect one neuron to another. The white color is caused by the myelin sheath surrounding the fibers.
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