Disclosed is a device to reduce slosh energy absorption in an animal or human subject. Slosh is the differential acceleration between the skull and its contents when acceleration is applied to the skull resulting in brain fluids colliding with themselves resulting in traumatic brain injury. At present, helmets are effective in preventing penetration or fracture of the skull, but a helmet has little ability to mitigate slosh effects. The device comprises a collar which is configured to partially encircle the neck of an animal or human subject. At least one region of the collar is inwardly directed to contact the neck. The at least one region contacting the neck applies a localised pressure to a neck vein restricting blood flow by compression thus increasing intracranial blood volume to reduce slosh by bracing the brain.
