extrapyramidal symptoms
Movement disorders caused by antipsychotic medications affecting the brain's motor control systems outside the pyramidal tract.
Full Definition
Extrapyramidal symptoms (EPS) are a group of movement disorders that occur as side effects of antipsychotic medications, particularly typical antipsychotics. These symptoms result from dopamine blockade in the basal ganglia and include acute dystonia, parkinsonism, akathisia, and tardive dyskinesia. The term 'extrapyramidal' refers to motor pathways outside the main pyramidal tract that controls voluntary movement. EPS can range from mild stiffness to severe, disabling movement abnormalities and represent a major concern in psychopharmacology. Early recognition and management of these symptoms is crucial for patient safety and medication compliance. Atypical antipsychotics generally have a lower risk of EPS, though they can still occur, particularly at higher doses.
Usage
Usage note: Often abbreviated as EPS in clinical documentation - ensure clarity for non-specialist readers.
In Context
- "The patient developed extrapyramidal symptoms within 48 hours of starting haloperidol." — Adverse event report
- "Regular monitoring for extrapyramidal symptoms is essential when prescribing typical antipsychotics." — Medication management protocol