Posterior semicircular canal nystagmus is conjugate and its axis is parallel to that of the canal

Phillip D. Cremer; A. A. Migliaccio; D. V. Pohl; I. S. Curthoys; L. Davies; R. A. Yavor; G. M. Halmagyi

Posterior semicircular canal nystagmus is conjugate and its axis is parallel to that of the canal

Phillip D. Cremer, A. A. Migliaccio, D. V. Pohl, I. S. Curthoys, L. Davies, R. A. Yavor, G. M. Halmagyi

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Pages (from-to)	2016-2020
Number of pages	5
Journal	Neurology
Volume	54
Issue number	10
State	Published - May 23 2000
Externally published	Yes

Keywords

Binocular
Ewald
Scleral search coil
Skew
Vestibular

ASJC Scopus subject areas

General Neuroscience

Cite this

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title = "Posterior semicircular canal nystagmus is conjugate and its axis is parallel to that of the canal",

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.",

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T1 - Posterior semicircular canal nystagmus is conjugate and its axis is parallel to that of the canal

AU - Cremer, Phillip D.

AU - Migliaccio, A. A.

AU - Pohl, D. V.

AU - Curthoys, I. S.

AU - Davies, L.

AU - Yavor, R. A.

AU - Halmagyi, G. M.

PY - 2000/5/23

Y1 - 2000/5/23

N2 - 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.

AB - 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.

KW - Binocular

KW - Ewald

KW - Scleral search coil

KW - Skew

KW - Vestibular

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AN - SCOPUS:0034705017

SN - 0028-3878

VL - 54

SP - 2016

EP - 2020

JO - Neurology

JF - Neurology

IS - 10

ER -

Posterior semicircular canal nystagmus is conjugate and its axis is parallel to that of the canal

Abstract

Keywords

ASJC Scopus subject areas

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