viernes, 18 de febrero de 2011

Acúfenos: Sección exacerbantes y atenuantes: La Temperatura no influye

Does caloric vestibular stimulation modulate tinnitus?next term

David M. Baguleya, Corresponding Author Contact Information, E-mail The Corresponding Author, Richard Knighta and Lucy Bradshawb
a Department of Audiology (94), Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge CB2 2QQ, United Kingdom
b Centre for Applied Medical Statistics, University of Cambridge, Forvie Site, Robinson Way, Cambridge CB2 0SR, United Kingdom
Received 23 December 2009; 
revised 20 January previous term2011;next term 
accepted 20 January previous term 
Available online 2 February previous term


Caloric vestibular stimulation (CVS) has been demonstrated to transiently modulate a variety of cognitive functions.

These effects are associated with the brain activation induced by CVS, involving the temporal–parietal cortex, anterior cingulate cortex and insular cortex, which are thought to form a multimodal vestibular cortical network.

The present study investigated the effect of CVS upon previous term Twenty patients undergoing vestibular function tests for symptoms of imbalance and who reported previous termtinnitusnext term were asked to rate their previous termtinnitusnext term using visual analogue measures of pitch and intensity immediately before and after CVS (H2O at 44 °C) in the ear ipsilateral to the previous term

One patient was excluded due to test findings indicative of a central vestibular abnormality.

The mean VAS pitch (pre–post) changed from 5.65 to 5.28 (95% confidence interval (−0.87, 0.12), p-value 0.13) and the mean change in intensity changed from 5.21 to 4.43 (95% confidence interval (−1.60, 0.04), p-value 0.06).

The findings indicate that there is no consistent influence of CVS upon previous termtinnitus,next term and we propose that perceived pitch and intensity of previous termtinnitusnext term are independent of the multimodal vestibular network that is activated by CVS.

Research highlights

► Caloric vestibular stimulation does not consistently influence previous termtinnitusnext term pitch nor intensity. ► The perception of previous termtinnitusnext term is extrinsic to the multi-modal vestibular cortical network. ► CVS can be quantified by standard and straightforward video nystagmography techinques.
Keywords: previous termTinnitusnext term; Caloric vestibular stimulation

Article Outline


Corresponding Author Contact InformationCorresponding author. Fax: +44 1223 596101.

Fuente: Neuroscience Letters
Article in Press, Corrected Proof - Note to users

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