It has been postulated that the vestibular stimulation is mediated by fibrous bands between footplate of stapes and the vestibular membranous labyrinth. Another explanation is that the vestibular response is due to an excessively mobile footplate.
Nystagmus associated with Hennebert sign is usually more marked when negative pressure is applied.
Camille Hennebert (1867–1954), was a Belgian otolaryngologist who originally noted the sign in cases of congenital syphilis 2.
- 1. Lee KJ. Essential Otolaryngology: Head and Neck Surgery, Ninth Edition. McGraw-Hill Professional. (2008) ISBN:0071482709. Read it at Google Books - Find it at Amazon
- 2. Shuman AG, Rizvi SS, Pirouet CW, Heidenreich KD. Hennebert's sign in superior semicircular canal dehiscence syndrome: a video case report. The Laryngoscope. 122 (2): 412-4. doi:10.1002/lary.22413 - Pubmed