Neurobiology Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
tetrodotoxin TTX
Potent neurotoxin that selectively blocks voltage-gated sodium channels, preventing action potential generation.
microglia
Immune cells of the central nervous system that monitor brain health and respond to injury or infection.
miniature end-plate potential
Small spontaneous depolarizations at the neuromuscular junction caused by single vesicle release.
mossy fiber sprouting
Aberrant growth of hippocampal mossy fibers that creates new excitatory synapses, often associated with temporal lobe ep...
motor unit
A motor neuron and all the muscle fibers it innervates, functioning as the basic unit of muscle contraction.
neural oscillations
Rhythmic fluctuations in electrical activity across neural populations, measured as coordinated changes in membrane pote...
neuritic plaque
Extracellular deposits of amyloid-beta protein surrounded by dystrophic neurites, a hallmark pathological feature of Alz...
neurodegenerative disease
Progressive disorder characterized by the gradual loss of structure or function of neurons, leading to cognitive or moto...
neurofibroma
A benign peripheral nerve sheath tumor composed of Schwann cells, fibroblasts, and perineural cells.
neurogenesis
The process by which new neurons are generated from neural stem cells in the developing and adult brain.
neuropharmacology
The study of how drugs affect cellular function in the nervous system and their mechanisms of action on neural processes...
neuropil
Dense network of unmyelinated axons, dendrites, and glial processes between neuronal cell bodies in gray matter.
neuroplasticity
The brain's ability to reorganize and form new neural connections throughout life.
neurotransmitter
Chemical messengers that transmit signals across synapses between neurons.
node of Ranvier
Gaps in the myelin sheath along myelinated axons where voltage-gated ion channels cluster for saltatory conduction.
oligodendrocyte
A type of glial cell responsible for producing myelin sheaths around axons in the central nervous system.
optogenetics
Technique using light to control genetically modified neurons expressing light-sensitive proteins.
paired-pulse facilitation
Enhanced neurotransmitter release when two stimuli are delivered in close succession.
paroxysmal depolarization shift
A prolonged depolarization of neurons that underlies epileptic seizure activity, characterized by sustained calcium infl...
parvalbumin-positive interneuron
Fast-spiking inhibitory neurons expressing the calcium-binding protein parvalbumin.
patch clamp
An electrophysiological technique using a glass micropipette to measure ionic currents across cellular membranes.
periictal
The time period immediately before, during, and after a seizure, encompassing preictal, ictal, and postictal phases.
perikaryon
The cell body of a neuron containing the nucleus and most organelles, excluding axons and dendrites.
perineuronal net
Extracellular matrix structure surrounding certain neurons that regulates synaptic plasticity and stability.
place cell
Hippocampal neurons that fire when an animal is in a specific location within its environment.