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Neurobiology Glossary

100 terms total — 24 showing — Last updated 15 Sep 2026

tetrodotoxin TTX

Professional Technical IVT

Potent neurotoxin that selectively blocks voltage-gated sodium channels, preventing action potential generation.

Showing 73–96 of 100

population vector

Professional Technical IVT

Mathematical representation of movement direction decoded from multiple motor cortex neurons.

Technical Term Full entry →

postsynaptic density

Advanced Technical IVT

Protein-rich region beneath the postsynaptic membrane containing receptors and signaling molecules.

PSD
Technical Term Full entry →

presynaptic terminal

Intermediate Technical IVT

The endpoint of an axon containing synaptic vesicles and neurotransmitter release machinery.

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receptive field

Intermediate Technical IVT

The specific region of sensory space where stimuli can influence a neuron's firing rate.

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refractory period

Intermediate Technical IVT

The brief interval after an action potential during which a neuron cannot fire another action potential.

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resting potential

Intermediate Technical IVT

The stable electrical charge across a neuron's membrane when the cell is not actively signaling.

Technical Term Full entry →

retrograde signaling

Advanced Technical IVT

Communication from postsynaptic to presynaptic neurons that modulates neurotransmitter release.

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schaffer collateral

Intermediate Technical IVT

Axonal projections from hippocampal CA3 pyramidal neurons that synapse onto CA1 pyramidal neurons, forming a major hippo...

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seizure focus

Intermediate Technical IVT

The specific brain region where abnormal electrical activity originates during an epileptic seizure.

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sharp-wave ripple

Advanced Technical IVT

A high-frequency oscillatory event in the hippocampus associated with memory consolidation during rest and sleep.

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silent synapse

Advanced Technical IVT

A synaptic connection containing only NMDA receptors, functionally inactive at resting potential but recruitable during...

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somatotopy

Advanced Technical IVT

Systematic spatial organization of neural representations that corresponds to the anatomical arrangement of body parts.

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spike train

Intermediate Technical IVT

A sequence of action potentials recorded from a single neuron over time, appearing as discrete electrical events.

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Form of synaptic plasticity where the relative timing of pre- and postsynaptic spikes determines synaptic strength chang...

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spike-triggered average

Professional Technical IVT

Statistical method to determine the stimulus features that precede action potentials.

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spiking neural network

Advanced Technical IVT

A computational model that incorporates the timing of individual action potentials, unlike rate-based neural networks.

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status epilepticus

Intermediate Technical IVT

A prolonged seizure or series of seizures lasting more than 30 minutes without recovery of consciousness, representing a...

Technical Term Full entry →

stereotactic electroencephalography

Professional Technical IVT

An invasive technique using depth electrodes placed with stereotactic precision to record intracranial EEG for epilepsy...

Technical Term Full entry →

stereotaxis

Advanced Technical IVT

Three-dimensional coordinate system used to precisely locate structures within the brain for surgical or experimental pr...

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synaptic cleft

Intermediate Technical IVT

The narrow gap between the presynaptic and postsynaptic neurons at a synapse.

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synaptic plasticity

Intermediate Technical IVT

The ability of synapses to strengthen or weaken over time in response to activity patterns and experience.

Technical Term Full entry →

temporal summation

Intermediate Technical IVT

Integration of multiple synaptic inputs arriving at a neuron within a short time window.

Technical Term Full entry →

tetrodotoxin

Professional Technical IVT

Potent neurotoxin that selectively blocks voltage-gated sodium channels, preventing action potential generation.

TTX
Technical Term Full entry →

theta rhythm

Intermediate Technical IVT

A prominent 4-12 Hz oscillation in the hippocampus associated with memory formation and spatial navigation.

Technical Term Full entry →
Showing 73–96 of 100

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