Clinical Neurology Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
hemianopia
Loss of vision in half the visual field, typically indicating damage to the visual pathways posterior to the optic chiasm.
glioblastoma multiforme
A highly malignant primary brain tumor, the most aggressive form of glioma, commonly abbreviated as GBM.
gliosis
Proliferation of glial cells in response to central nervous system injury or disease.
hemianopia
Loss of vision in half the visual field, typically indicating damage to the visual pathways posterior to the optic chias...
hemiatrophy
Progressive wasting or diminished development of structures on one side of the body or brain.
hemineglect
A neuropsychological condition where patients fail to attend to or respond to stimuli on one side of space, typically th...
hemiplegia
Complete paralysis of one side of the body, typically following stroke or brain injury.
hemispherectomy
Surgical procedure involving the removal or disconnection of one cerebral hemisphere, typically performed for severe, in...
hydrocephalus
A condition characterized by excessive accumulation of cerebrospinal fluid within the brain's ventricular system.
hyperreflexia
Abnormally increased or overactive deep tendon reflexes, typically indicating upper motor neuron dysfunction.
ictal
Relating to or occurring during a seizure episode.
ideomotor apraxia
A motor planning disorder where patients understand tasks but cannot execute learned movements on command despite intact...
interictal
Referring to the period between seizures in patients with epilepsy, when no obvious seizure activity is occurring.
intracranial pressure
The pressure inside the skull, commonly abbreviated as ICP, critical for monitoring neurological patients.
ischemic penumbra
Brain tissue surrounding an infarct core that is hypoperfused but potentially salvageable with prompt reperfusion therap...
Kernig sign
Clinical sign of meningeal irritation where passive knee extension with hip flexed at 90 degrees elicits pain and resist...
kindling
Progressive increase in seizure susceptibility following repeated subthreshold electrical or chemical stimulation of bra...
leucoaraiosis
Diffuse white matter changes seen on brain imaging, typically associated with small vessel disease and aging.
lumbar puncture
Procedure to collect cerebrospinal fluid by inserting a needle into the spinal canal.
magnetic resonance imaging
Advanced neuroimaging technique using magnetic fields and radio waves, universally abbreviated as MRI in clinical practi...
mirror neuron
Neurons that fire both when performing an action and when observing another individual perform the same action.
multiple sclerosis
A chronic autoimmune demyelinating disease of the central nervous system, commonly abbreviated as MS in clinical documen...
myasthenia gravis
Autoimmune neuromuscular disorder causing fluctuating muscle weakness and fatigue.
myoclonus
Brief, sudden, involuntary muscle contractions that can affect any part of the body.
nerve conduction study
Electrodiagnostic test measuring the speed and strength of electrical signals in peripheral nerves, abbreviated as NCS.