Author/Editor		Hočevar-Boltežar, I; Vatovec, J; Geczy, B; Gros, A; Battelino, S; Lavrenčak, B; Žargi, M
Title		Sprememba uravnavanja fonacije po vstavitvi polževega vsadka
Translated title		Change of phonation control after cochlear implantation
Type		članek
Source		In: Hernja N, Brumec M, editors. Zbornik referatov 3. slovenskega posveta o rehabilitaciji oseb s polževim vsadkom; 2006 nov 10-11; Maribor. Maribor: Center za sluh in govor,
Publication year		2006
Volume		str. 69-72
Language		slo
Abstract		Background. Auditory feedback is very important in the control of phonation. The aim of the study was to compare some phonation parameters before and after cochlear implantation (CI). Methods. There wee 32 prelingually deafened and 6 postlingually deafened children, and 7 prelingually and 12 postlingually deafened adults included in the study. The acoustic analysis of the voice samples was performed before and 12-18 months after CI using MDVP (Kay Elemetrics, USA). The fundamental frequency (FO), fitter (JIT), shimmer (SH) and noise-to-harmonic-ratio (NHR) were compared before and after CI. Results. In the prelingually deafened children JIT, SH, and NHR significantly decreased after CI. FO did not change much. In the postlingually deafened children and in the adults no significant changes in F0, JIT, SH, and NHR were detected. The parameters of the acoustic analysis of the voice of the prelinguallly deafened children differed the most from the normative data. Conclusions. The acquisition of auditory control significantly improved the phonation control only in fhe prelingually deafened children. The reason for the improvement is probably the plasticity of the neuromuscular phonation system which does not exist any more in the adults. In the postlingually deafened population the deterioration of the phonation control during being deaf was probably not so great that a significant improvement could be detected after reacquisition of the auditory control.
Descriptors		DEAFNESS COCHLEAR IMPLANT PHONATION VOICE QUALITY