Research Reports - Depression and sports-related concussion

Presse Med. 2017 Sep 14. pii: S0755-4982(17)30372-X. doi:
10.1016/j.lpm.2017.08.013. [Epub ahead of print]

Yrondi A(1), Brauge D(2), LeMen J(3), Arbus C(4), Pariente J(5).

CONTEXT: Head injuries are risk factors for chronic depressive disorders, but
this association remains poorly explored with regards to concussion.
OBJECTIVES: The objective of this review was to evaluate the incidence of
depressive symptoms and depression after sports-related concussion. We also
endeavored to identify the response elements regarding the pathophysiology of
these symptoms.
METHODS: A systematic search of PubMed and Embase was conducted focusing on
papers published until 1st December, 2016, according to PRISMA criteria The
following MESH terms were used: (concussion or traumatic brain injury) and sport
and (depression or depressive disorder).
RESULTS: A depressive disorder can appear immediately after a concussion:
depressive symptoms seem to be associated with the symptoms of the concussion
itself. A depressive disorder can also appear later, and is often linked to the
frequency and number of concussions. Furthermore, the existence of a mood
disorder prior to a concussion can contribute to the onset of a depressive
disorder after a concussion.
LIMITS: There is an overall limit concerning the definition of a depressive
disorder. In addition, when these studies had controls, they were often compared
to high-level athletes; yet, practicing sport regularly is a protective factor
against mood pathologies.
CONCLUSIONS: Depressive symptoms after a concussion seem to be associated with
postconcussion symptoms. Repeat concussions can contribute to later-onset major
depressive disorders. However, playing sports can protect against major
depressive disorders: thus, it is essential to evaluate concussions as accurately
as possible. 

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