A Case of Acoustic Shock with Post-trauma Trigeminal-Autonomic Activation

This study reports the case of an acoustic shock injury (ASI), which did not result in a significant hearing loss, but was followed by manifold chronic symptoms both within (tinnitus, otalgia, tingling in the ear, tension in the ear, red tympanum) and outside the ears (blocked nose, pain in the neck/temporal region). We suggest that these symptoms may result from a loop involving injury to middle ear muscles, peripheral inflammatory processes, activation and sensitization of the trigeminal nerve, the autonomic nervous system and central feed-backs. The pathophysiology of this ASI is reminiscent of that observed in post-traumatic trigeminal autonomic cephalalgia. This framework opens new and promising perspectives on the understanding and medical management of ASI.