What’s the difference between acquired brain injury and traumatic brain injury?

Head Injury:
injury to the skull, scalp, face, etc

Brain Injury: 
injury to the brain

Acquired Brain Injury:
injury to the brain that has occurred after birth ie: stroke, tumour, infection, traumatic brain injury

Traumatic Brain Injury: 
injury to the brain by an external force ie: assault, fall, blunt object