Fig. 2From: Frequent mild head injury promotes trigeminal sensitivity concomitant with microglial proliferation, astrocytosis, and increased neuropeptide levels in the trigeminal pain systemSchematic of mild closed head injury. a Cartoon shows foam bedding to support rat while under anesthesia induced through nose cone and impactor with rubber tip. b Cartoon positioned at anterior-posterior orientation with nose-cone facing forward shows 20° angle of impactor tipBack to article page