ALHL	Acute low-tone sensorineural hearing loss
MD	Ménière’s disease
MRI	Magnetic resonance imaging
PPD	The distance between the vertical part of the posterior semicircular canal and the posterior fossa
VA	Vestibular aqueduct
ES	Endolymphatic sac
ELH	Endolymphatic hydrops
ED	Endolymphatic duct
ECochG	Electrocochleogram
PTA	Pure tone average
VEMP	Vestibular evoked myogenic potential
cVEMP	Cervical vestibular evoked myogenic potential
oVEMP	Ocular vestibular evoked myogenic potential
ATVA	Angular trajectory of the vestibular aqueduct
ΔpSCC-post	The sagittal distance between the most posterior border of the posterior semicircular canal and the posterior temporal bone surface