Of necessity, the investigations required for any patient with an acute headache will depend upon the:

  • Characteristics of the headache
  • Age and co-morbidities of the patient
  • Presence or absence of focal neurological signs

The most important investigation is the neurological examination itself. This must include:

  • Alertness and cognitive function
  • Limb power, tone, reflexes and sensation
  • Pronator drift
  • Cranial nerves
  • Visual fields to confrontation
  • Fundoscopy
  • Cerebellar function