Acute Cerebellar Syndromes
Overview
Acute cerebellar syndromes refer to the sudden onset of neurological symptoms resulting from dysfunction of the cerebellum, a structure essential for coordinating voluntary movements, balance, and motor control.
These syndromes are time-critical presentations in emergency medicine, as underlying causes range from vascular events (such as infarction or haemorrhage) to metabolic, infectious, toxic, or neoplastic processes.
Prompt recognition, targeted investigation, and early specialist involvement are vital to prevent morbidity and mortality, particularly given the risk of rapid neurological deterioration from brainstem compression or hydrocephalus.
Clinical Presentation Patients with acute cerebellar syndromes may present with:
- Ataxia: Gait disturbance, limb incoordination, or truncal instability.
- Dysarthria: Slurred or scanning speech.
- Nystagmus and oculomotor abnormalities: Gaze-evoked nystagmus, ophthalmoplegia.
- Vertigo and dizziness: Often severe, frequently accompanied by nausea and vomiting.
- Headache: Especially prominent in vascular causes.
- Altered mental status: Ranging from confusion to reduced consciousness, particularly with raised intracranial pressure or Wernicke encephalopathy.
- Other neurological signs: May include cranial nerve palsies, hemiparesis, or visual field defects, especially in posterior circulation strokes.
Clinical Note: Bilateral cerebellar signs can occur even with unilateral lesions due to the cerebellum’s extensive interconnections.