Evidence-Based Reviews

Psychiatric manifestations of sport-related concussion

Current Psychiatry. 2020 July;19(7):22-28A | doi:10.12788/cp.0010

References

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Regarding a dose-response relationship in retired athletes, Guskiewicz et al¹¹ reported a 3-fold increased risk of depression among retired professional football players who had experienced ≥3 SRCs. Five years later, the same research group reported a 5.8-fold increased risk of depression in retired professional football players after 5 to 9 concussions.¹⁰ In sum, there is evidence to suggest that the more SRCs an athlete sustains, the more likely they are to develop depression. Moreover, depression may persist or develop long after an SRC occurs.

Suicide risk

While suicide among athletes, especially football players, who have experienced concussion has received relatively widespread media attention, the risk of suicide in former professional football players appears to be significantly lower than in the general population.¹² A recent large systematic review and meta-analysis reported on 713,706 individuals diagnosed with concussion and/or mild TBI and 6,236,010 individuals with no such diagnoses.¹³ It found a 2-fold higher risk of suicide in individuals who experienced concussion and/or mild TBI, but because participants were not necessarily athletes, it is difficult to extrapolate these findings to the athlete population.

Other psychiatric symptoms associated with SRC

Posttraumatic stress disorder (PTSD). Some athletes experience PTSD symptoms shortly after SRC, and these can be missed if clinicians do not specifically ask about them.¹⁴ For example, substantial proportions of athletes who have had an SRC report making efforts to avoid sport situations that are similar to how and where their SRC occurred (19%), having trouble keeping thoughts about sustaining the SRC out of their heads (18%), experiencing flashbacks of sustaining the SRC (13%), and having nightmares about sustaining the SRC (8%).¹⁴ Posttraumatic stress disorder may have a negative impact on an athlete’s performance because a fear of re-injury might lead them to avoid rehabilitation exercises and inhibit their effort.^15-18

Attention-deficit/hyperactivity disorder (ADHD) is commonly comorbid with SRC.^19,20 It is not known if pre-existing ADHD makes sustaining a concussion more likely (eg, because the athlete is distractible and thus does not notice when an opponent is about to hit them hard) and/or if a history of concussion makes ADHD more likely to develop (eg, because something about the concussed brain is changed in a way that leads to ADHD). Additionally, in some cases, ADHD has been associated with prolonged recovery from SRC.^3,21

Immediate medical evaluation and cognitive assessment

Any patient in whom an SRC is suspected should undergo a medical evaluation immediately, whether in a physician’s office, emergency department, or on the sideline of a sports event. This medical evaluation should incorporate a clinical neurologic assessment, including evaluation of mental status/cognition, oculomotor function, gross sensorimotor, coordination, gait, vestibular function, and balance.³

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Psychiatric manifestations of sport-related concussion

References

Suicide risk

Other psychiatric symptoms associated with SRC

Immediate medical evaluation and cognitive assessment

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