Hennebert sign

Henne·bert sign

(en'ĕ-bār),
nystagmus produced by pressure applied to a sealed external auditory canal; may be seen in labyrinthine fistula or with intact tympanic membrane in syphilitic involvement of the otic capsule.

Hen·ne·bert sign

(en'ĕ-bār sīn)
Nystagmus produced by pressure applied to a sealed external auditory canal; may be seen in labyrinthine fistula or with intact tympanic membrane in syphilitic involvement of the otic capsule.
See also: Tullio phenomenon
References in periodicals archive ?
The typical symptoms of SSCD include vertigo, disequilibrium, autophony, conductive hearing loss, hyperacusis of bone conduction, and pulsatile tinnitus, as well as typical signs such as the Tullio phenomenon (intense sound induced vertigo) and the Hennebert sign (pressure-induced vertigo).
In addition, the Tullio phenomenon and Hennebert sign were found in 6 patients.
3,4) The Hennebert sign (rotatory nystagmus when positive or negative pressure is applied to the tympanic membrane) has been historically well regarded, but it is actually positive in less than 50% of confirmed cases of PLF; furthermore, it is positive in as many as 30% of patients with Meniere disease.