Reducción de la ganancia del canal semicircular posterior en el test del impulso cefálico con la edad. Estudio observacional

Jiménez, Gloria Guerra; Pérez-Fernández, Nicolas

doi:10.1016/j.otorri.2014.12.002

Cited by 12 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Preliminary correlation analysis between patient's age and VOR-gain values for each SC (both pre- and post-treatment) in subjects with defined affected SC ( n . 53) was performed prior to investigating VOR-gain behavior among different subgroups, to ensure lack of consistent age-related bias involving canal activity ( 50 ). Only a negative correlation between patients' age and presenting VOR-gains for the other vertical SC ipsilaterally to the affected canal (rho = −0.279, p = 0.043) and for the contralateral SC other than the canal coupled with the affected SC (rho = −0.302, p = 0.028) was found ( Figure 3 ).…”

Section: Resultsmentioning

confidence: 99%

Feasibility of Using the Video-Head Impulse Test to Detect the Involved Canal in Benign Paroxysmal Positional Vertigo Presenting With Positional Downbeat Nystagmus

et al. 2020

View full text Add to dashboard Cite

Positional downbeat nystagmus (pDBN) represents a relatively frequent finding. Its possible peripheral origin has been widely ascertained. Nevertheless, distinguishing features of peripheral positional nystagmus, including latency, paroxysm and torsional components, may be missing, resulting in challenging differential diagnosis with central pDBN. Moreover, in case of benign paroxysmal positional vertigo (BPPV), detection of the affected canal may be challenging as involvement of the non-ampullary arm of posterior semicircular canal (PSC) results in the same oculomotor responses generated by contralateral anterior canal (ASC)-canalolithiasis. Recent acquisitions suggest that patients with persistent pDBN due to vertical canal-BPPV may exhibit impaired vestibulo-ocular reflex (VOR) for the involved canal on video-head impulse test (vHIT). Since canal hypofunction normalizes following proper canalith repositioning procedures (CRP), an incomplete canalith jam acting as a "low-pass filter" for the affected ampullary receptor has been hypothesized. This study aims to determine the sensitivity of vHIT in detecting canal involvement in patients presenting with pDBN due to vertical canal-BPPV. We retrospectively reviewed the clinical records of 59 consecutive subjects presenting with peripheral pDBN. All patients were tested with video-Frenzel examination and vHIT at presentation and after resolution of symptoms or transformation in typical BPPV-variant. BPPV involving non-ampullary tract of PSC was diagnosed in 78%, ASC-BPPV in 11.9% whereas in 6 cases the involved canal remained unidentified. Presenting VOR-gain values for the affected canal were greatly impaired in cases with persistent pDBN compared to subjects with paroxysmal/transitory nystagmus (p < 0.001). Each patient received CRP for BPPV involving the hypoactive canal or, in case of normal VOR-gain, the assumed affected canal. Each subject exhibiting VOR-gain reduction for the involved Castellucci et al. vHIT in Positional Downbeat Nystagmus canal developed normalization of vHIT data after proper repositioning (p < 0.001), proving a close relationship with otoliths altering high-frequency cupular responses. According to our results, overall vHIT sensitivity in detecting the affected SC was 72.9%, increasing up to 88.6% when considering only cases with persistent pDBN where an incomplete canal plug is more likely to occur. vHIT should be routinely used in patients with pDBN as it may enable to localize otoconia within the labyrinth, providing further insights to the pathophysiology of peripheral pDBN.

show abstract

Section: Resultsmentioning

confidence: 99%

Feasibility of Using the Video-Head Impulse Test to Detect the Involved Canal in Benign Paroxysmal Positional Vertigo Presenting With Positional Downbeat Nystagmus

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The cut-off values are about 0.8 for horizontal and 0.6 for vertical vHIT. These values might decrease with an increasing age in some but not all studies and depending on the type of measuring device used [35][36][37][38][39][40]. RFS might occur during the head impulse or after the end of the head impulse and are referred to as covert and overt RFS [29].…”

Section: Video-head-impulse Test (Vhit)mentioning

confidence: 99%

Testing of the Semicircular Canal Function in Vertigo and Dizziness

Rambold¹

2017

Up to Date on Meniere's Disease

View full text Add to dashboard Cite

Testing the function of the semicircular canals (SCC) in vertigo and dizziness is an important step towards a diagnosis. There are different vestibular tests available: rotatory testing, bithermal caloric irrigation (CI) and the video-head-impulse test (vHIT). This chapter describes the basic methods, the current knowledge and economic aspects focused on the vHIT and CI. After a general section, common vertigo diseases are discussed with respect to the functional tests. From this chapter, it is clear that not only one method has to be applied to test vestibular function but a battery including the CI and the vHIT in three dimensions.

show abstract

“…Finally, these results in seniors could be explained by the aged effect on the vestibular system (19). The canal function assessed by the vHIT did not change with age for the horizontal and anterior canal and slightly decreased for the posterior canal (20, 21). The otolith function assessed by VEMPs decreased with age, and seniors became non-responders (no VEMPs from both ears) to air-conducted and bone-conducted stimulation (22–25).…”

Section: Discussionmentioning

confidence: 83%

Balance in Virtual Reality: Effect of Age and Bilateral Vestibular Loss

et al. 2017

View full text Add to dashboard Cite

BackgroundQuantitative balance measurement is used in clinical practice to prevent falls. The conditions of the test were limited to eyes open, eyes closed, and sway-referenced vision. We developed a new visual perturbation to challenge balance using virtual reality (VR), measuring postural stability by a Wii Balance Board (WBB).MethodsIn this study, we recorded balance performance of 116 healthy subjects and of 10 bilateral vestibular loss patients using VR to assess the effect of age and the effect of total loss of vestibular function. We used several conditions: eyes open (normal visual inputs), eyes closed (no visual inputs), stable visual world (vision referenced), and perturbed visual world (visual perturbation) at different amplitudes of perturbation. Balance under these visual conditions was assessed on the WBB (stable support surface) and on the WBB plus foam rubber (unstable support surface).ResultsIn healthy subjects, we found that the percentage of falls increased with age and with the amplitude of perturbation for both conditions: WBB or WBB + foam. Moreover, we can define a threshold for falls in each age group as the amplitude of perturbation which induced falls. For bilateral vestibular loss patients, on the WBB + foam, all of them failed with eyes closed and with perturbed visual world even at the minimal amplitude of perturbation. Finally, we observed that stable visual world induced fewer falls than eyes closed whatever the subject’s group (healthy or bilateral vestibular loss) and whatever the age decade.ConclusionVR allowed us to develop a useful new tool with a wide range of visual perturbations. Rather than only two levels of visual condition (eyes open and eyes closed), the VR stimulus can be continuously adjusted to produce a visual perturbation powerful enough to induce falls even in young healthy subjects and which has allowed us to determine a threshold for falls.

show abstract

Reducción de la ganancia del canal semicircular posterior en el test del impulso cefálico con la edad. Estudio observacional

Cited by 12 publications

References 24 publications

Feasibility of Using the Video-Head Impulse Test to Detect the Involved Canal in Benign Paroxysmal Positional Vertigo Presenting With Positional Downbeat Nystagmus

Feasibility of Using the Video-Head Impulse Test to Detect the Involved Canal in Benign Paroxysmal Positional Vertigo Presenting With Positional Downbeat Nystagmus

Testing of the Semicircular Canal Function in Vertigo and Dizziness

Balance in Virtual Reality: Effect of Age and Bilateral Vestibular Loss

Contact Info

Product

Resources

About