Clinical psychologist Julianne Kirkham will present “What is a Concussion?” at Northern Michigan University. The presentation will begin at 3 p.m. Friday, Feb. 6, in room 167 of Gries Hall. It is free and open to the public.

Kirkham will break down the current advanced laboratory science that helps to explain concussions and their physical, cognitive and emotional aftereffects.

The presentation is part of the department of psychology’s colloquium series and organized by NMU’s Psi Chi chapter. For more information, call 227-2935.