Three dimensional analysis of caloric nystagmus using computerized image recognition.

Kurosaki, Sadayuki

doi:10.3950/jibiinkoka.95.510

Cited by 2 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where does the vertical component originate from? It is reported that all three semicircular canals are inhibited during cold calorization in a supine position [2,3]. Suzuki et al [13] and Cohen et al [14] proved in an animal experiment that the vertical nystagmus toward the upper eyelid is generated by the inhibition of the anterior canal or excitation of the posterior canal.…”

Section: Discussionmentioning

confidence: 97%

“…(1) The caloric first phase was measurable in both ears. (2) No severe disorders in the central nervous system. Patients with suspected central vestibular disorders underwent brain MRI or CT examination, which revealed no abnormality except for aging change such as small lacunar infarctions.…”

Section: Subjectsmentioning

confidence: 99%

“…Since then, the caloric test has been very useful as a method to check the function of each labyrinth separately. Although the caloric response is caused by all three semicircular canals [2,3], the vertical component of the caloric response was rarely discussed due to the difficulty of its accurate measurement in electronystagmography (ENG). Likewise, interest in the caloric test was restricted to the first phase, because normally the caloric second phase did not appear when the subject remained in their original testing position [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Clinical significance of vertical component of caloric response including its second phase in vertiginous patients

Aoki

Arai

Ide

et al. 2007

Acta Oto-Laryngologica

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Subjectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Clinical significance of vertical component of caloric response including its second phase in vertiginous patients

Aoki

Arai

Ide

et al. 2007

Acta Oto-Laryngologica

View full text Add to dashboard Cite

show abstract

Usefulness of the head-tilt caloric test as a simple method to evaluate the functions of the vertical semicircular canals

Aoki¹,

Arai²,

Yoda³

et al. 2009

Equilibrium Res

View full text Add to dashboard Cite

The "head-tilt caloric test" reported by us previously can be used as a simple method to check the functions of the vertical semicircular canals. We evaluated the clinical usefulness of this test in this study. We examined the ENG recordings of 154 ears of 80 patients who underwent the head-tilt caloric test and showed normal caloric response of the horizontal component.In 49 of the 154 ears (32%), the results of the head-tilt caloric test could not be evaluated due to the following reasons: blinking and unstable eye movements in 31 ears, pseudo -vertical component in the ENG recordings in 10 ears, and presence of a vertical component in spontaneous or positional nystagmus in 8 ears.In the remaining 105 ears (68%) for which the results of the head-tilt caloric test could be evaluated, 51 showed responses of both the anterior and posterior canals, 29 showed response of only the posterior canal , 14 showed response of only the anterior canal, and 11 showed no response of either vertical canal.In short, the head-tilt caloric test could detect the function of at least one of the vertical canals in 90% (94/105) of the ears for which the results of the test could be properly evaluated and 61% (94/154) of the ears for which the test was performed. Therefore, we believe that the head-tilt caloric test is applicable in daily practice for screening of the vertical canal functions.In addition, we compared the results of the head-tilt caloric test for the right and left ears. Both ears showed basically the same results, although the response rate of the anterior canal of the left ear, in which the test was performed last, was the lowest.

show abstract

Three dimensional analysis of caloric nystagmus using computerized image recognition.

Abstract: Three-component analysis of caloric nystagmus, focusing on horizontal, vertical, and torsional directions, using a newly developed computerized eye movement analysis system was carried out in ten normal human subjects.

Cited by 2 publications

References 15 publications

Clinical significance of vertical component of caloric response including its second phase in vertiginous patients

Clinical significance of vertical component of caloric response including its second phase in vertiginous patients

Usefulness of the head-tilt caloric test as a simple method to evaluate the functions of the vertical semicircular canals

Contact Info

Product

Resources

About