The functional neuroanatomy of tinnitus: evidence for limbic system links and neural plasticity.
Neurology
; 50(1): 114-20, 1998 Jan.
Article
en En
| MEDLINE
| ID: mdl-9443467
ABSTRACT
We used PET to map brain regions responding to changes in tinnitus loudness in four patients who could alter tinnitus loudness by performing voluntary oral facial movements (OFMs). Cerebral blood flow was measured in four patients and six controls at rest, during the OFM, and during stimulation with pure tones. OFM-induced loudness changes affected the auditory cortex contralateral to the ear in which tinnitus was perceived, whereas unilateral cochlear stimulation caused bilateral effects, suggesting a retrocochlear origin for their tinnitus. Patients, compared with controls, showed evidence for more widespread activation by the tones and aberrant links between the limbic and auditory systems. These abnormal patterns provide evidence for cortical plasticity that may account for tinnitus and associated symptoms. Although audiologic symptoms and examinations of these patients were typical, the unusual ability to modulate tinnitus loudness with an OFM suggests some caution may be warranted in generalizing these findings.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Acúfeno
/
Mapeo Encefálico
/
Sistema Límbico
/
Plasticidad Neuronal
Límite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Neurology
Año:
1998
Tipo del documento:
Article
País de afiliación:
Estados Unidos