These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Posterior semicircular canal nystagmus is conjugate and its axis is parallel to that of the canal.
    Author: Cremer PD, Migliaccio AA, Pohl DV, Curthoys IS, Davies L, Yavor RA, Halmagyi GM.
    Journal: Neurology; 2000 May 23; 54(10):2016-20. PubMed ID: 10822450.
    Abstract:
    A patient with a postoperative fistula of the left posterior semicircular canal is presented. Negative pressure in the external ear canal produced upbeat-torsional nystagmus, which was recorded in three dimensions using binocular scleral search coils. The nystagmus was conjugate, without skew deviation, and its trajectory corresponded to the anatomic axis of the left posterior canal. The current study helps validate Ewald's first law in humans: the axis of nystagmus should match the anatomic axis of the semicircular canal that generated it. This law is clinically useful in diagnosing pathology of the vestibular end-organ, such as benign paroxysmal positional vertigo or the superior semicircular canal dehiscence syndrome.
    [Abstract] [Full Text] [Related] [New Search]