focal seizure
Noun: A focal seizure is a type of seizure that begins in a specific, localized area of one hemisphere of the brain. It involves a transitory disturbance in motor, sensory, or autonomic function resulting from abnormal, excessive, or synchronous neuronal activity in the cerebral cortex. Consciousness may or may not be impaired.
The term is used in medical and neurological contexts to classify and describe seizure activity that originates from a focused brain region, as opposed to generalized seizures which affect both hemispheres widely from the onset. * It is often modified by descriptors indicating the area of the brain involved or the primary symptom (e.g., focal motor seizure, focal sensory seizure). * It can be used to describe the event itself or as a diagnostic classification.
- The patient's symptoms, involving twitching only in the right hand, were diagnosed as a focal seizure.
- Focal seizures can sometimes progress to affect the entire brain, becoming a generalized tonic-clonic seizure.
- An EEG confirmed the abnormal cortical activity characteristic of a focal seizure.
- Focal aware seizure (formerly simple partial seizure): A focal seizure during which awareness/responsiveness is fully intact.
- Focal impaired awareness seizure (formerly complex partial seizure): A focal seizure during which awareness or consciousness is affected.
- Focal to bilateral tonic-clonic seizure: A seizure that starts as a focal seizure and then spreads to involve both hemispheres of the brain, evolving into a convulsive seizure.
- Partial seizure: An older, synonymous term for focal seizure, still commonly used.
- Seizure focus (n): The specific area of the brain where a focal seizure originates.
- Focal epilepsy (n): A neurological condition characterized by recurrent focal seizures.
- Partial seizure
- Localized seizure
- Generalized seizure (e.g., absence seizure, generalized tonic-clonic seizure)
- To have a focal seizure: The common verbal phrase describing the event.
- The child had a focal seizure characterized by a strange smell and staring.
- Focal seizure activity: Refers to the abnormal neuronal discharges seen on diagnostic tests like an EEG.
- The EEG showed focal seizure activity in the temporal lobe.
- transitory disturbance in motor or sensory function resulting from abnormal cortical activity