Light cupula phenomenon: a systematic review

Bal N., Altun M., KURU E., Behmen M. B., Toker O. G.

EGYPTIAN JOURNAL OF OTOLARYNGOLOGY, cilt.38, sa.1, 2022 (ESCI) identifier identifier

  • Yayın Türü: Makale / Derleme
  • Cilt numarası: 38 Sayı: 1
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1186/s43163-022-00336-5
  • Dergi Adı: EGYPTIAN JOURNAL OF OTOLARYNGOLOGY
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
  • Anahtar Kelimeler: Light cupula, Null plane, Lateral semicircular canal, Cupulolithiasis, Positional vertigo, CHANGING POSITIONAL NYSTAGMUS, HEMI-LABYRINTHECTOMIZED SUBJECTS, SENSORINEURAL HEARING-LOSS, NEUTRAL POSITION, VERTIGO, CONVERSION, ENDOLYMPH, DIAGNOSIS, PATTERN, HEAVY
  • Marmara Üniversitesi Adresli: Hayır

Özet

Geotropic direction-changing positional nystagmus (DCPN) is transient in lateral semicircular canal (LSSK) canalo-lithiasis; it usually cuts off within a minute and fatigues. However, a "light cupula" mechanism has been described for patients with positional vertigo who exhibit a persistent geotropic DCPN without delay or fatigue. When the cupula becomes lighter than the surrounding endolymph, deflection may occur in the cupula under the influence of gravity. The person experiences dizziness and persistent positional nystagmus can be observed while remaining in that position.