Traumatic Brain Injury and Suicidal Behavior: A Review

Area of Science:

• Neuroscience
• Psychiatry
• Public Health

Background:

• Rising suicide rates in the US necessitate identifying risk factors.
• Individuals with a history of traumatic brain injury (TBI) show an elevated risk for suicide.
• Understanding the link between TBI and suicidal behaviors is crucial for at-risk populations.

Purpose of the Study:

• To review the association between traumatic brain injury (TBI) and suicidal behaviors.
• To explore the neurobiological mechanisms, including neuroinflammation and chronic traumatic encephalopathy (CTE), linking repetitive TBI to suicide.
• To summarize interventions for preventing suicidal behavior in individuals with TBI.

Main Methods:

• Literature review of studies examining TBI and suicidality.
• Analysis of the relationship between TBI history and suicide death, attempts, and ideation.
• Discussion of models for repetitive TBI and their link to neuroinflammation and suicide.

Main Results:

• Evidence suggests a significant association between TBI and increased risk of suicide death, attempts, and ideation.
• Repetitive TBIs may lead to chronic traumatic encephalopathy (CTE), a neuroinflammatory process potentially linked to suicide.
• Suicidology terms are defined to provide a clear framework for the review.

Conclusions:

• TBI is a significant risk factor for suicidal behavior.
• Neuroinflammation and CTE may mediate the link between repetitive TBI and suicide.
• Interventions are needed to mitigate suicide risk in individuals with TBI history.