Tinnitus supratentorial areas study through brain electric tomography (loreta)

Authors

Dr.med. Guillermo O. Bertora (Buenos Aires, Argentina)
Dr. med. Julia M. Bergmann (Buenos Aires, Argentina)

Proceedings

ASN - Volume 2 - 2004

Topics

Neurootology
Neurology
Diseases
Sensology
Hearing
Diseases
Sensology
Hearing
Neurootology
Neurology
Neurootology
Sensology
Hearing
Otologic tests
Sensology

Keywords

Brain electric tomography, Brain electrical tomography, Brain mapping, LORETA, Low Resolution Brain Electric Tomography, Tinnitus, Tinnitus topodiagnostic.

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Abstract

The tinnitus can be functionally measured and localized through sensorymotor and neurosensorial tests, then there arises a great demand for a systematic pharmacological treatment.
These tests indicate the numerous and different locations of the symptom, and enable us to prove that in around 24% of the patients, tinnitus has a peripheral origin, in 35% it is originated in the brainstem and in 41% at a supratentorial level.
With the Brain Electric Tomography -Loreta, we are in a position so as to measure cerebral cortex elaboration of sensory stimuli, to evaluate its temporospatial distribution on the cortex and, in line with the individual pattern obtained, to carry out the Statistical non Parametric Mapping – SnPM- related to general population parameters.
The existence of frontalization in all these patients and the involvement of the limbic area have been extensively demonstrated in tinnitus, but there is a very significant interindividual variation where different types of cerebral rhythms can be combined indicating, definitely, a hypofunction or hyperfunction of some neurotransmitters.