Head Injury and Delirium: Understanding the Link

Yes, a head injury from a fall can cause delirium—an acute, fluctuating disturbance in attention, awareness, and cognition.

Mechanism

• Traumatic brain injury (TBI) disrupts neurotransmission (acetylcholine, dopamine), cerebral perfusion, and blood-brain barrier.
• Even mild TBI (concussion) can precipitate delirium, especially in older adults or those with baseline cognitive impairment.

Delirium Features

• Sudden onset (hours–days)
• Inattention, disorientation, memory deficits
• Fluctuating course
• Altered consciousness (hyperalert to lethargic)
• Perceptual disturbances (hallucinations, illusions)
• Sleep-wake reversal

Action Steps

1. Seek immediate medical evaluation after any head trauma with confusion.
2. Rule out intracranial bleed (CT head), metabolic derangements, infection, medication effects.
3. Treat underlying cause; provide reorientation, hydration, sleep hygiene, minimize anticholinergics/sedatives.
4. Most post-traumatic delirium resolves in days–weeks; persistent symptoms warrant neuropsychiatric follow-up.

Delirium is a medical emergency—prompt recognition improves outcomes.