Shortcuts

open access

Vol 8, No 1 (2006)
Prace oryginalne
Published online: 2006-01-23
Get Citation

Influence of ischaemic lesion of left hemisphere in the region of basal ganglia on the variability of acoustic parameters of speech

Ryszard Podemski, Krzysztof Słotwiński, Konstanty Gurański, Sławomir Budrewicz
Udar Mózgu. Problemy Interdyscyplinarne 2006;8(1):16-21.

open access

Vol 8, No 1 (2006)
Prace oryginalne
Published online: 2006-01-23

Abstract

Introduction. The basal ganglia of the dominant brain hemisphere have numerous connections with associating frontal lobe cortex, which has a strategic importance for the programming of the speech, the linguistic and articulation patterns creation. The ischaemic stroke involving basal ganglia can cause aphasic speech disturbances (the subcortical aphasia); the influence of the subcortical lesion on the creation and variability of speech sounds could not be excluded. The aim of the study is the fundamental frequency (F0) and formants F1-F4 estimation of vowel "a" in patients with basal ganglia ischaemic lesion in dominant for speech cerebral hemisphere.
Material and methods. The study comprised 28 right-handed patients (16 women, 12 men; mean age 54,2 years), with ischaemic lesion involving basal ganglia in the left hemisphere and 30 healthy persons (mean age 52,7 years). Computer speech analysis was performed in all persons using acoustic program "Iris". Patients with aphasia and dysarthria were excluded. A vowel "a" pronounced for 5 s was analyzed. Fundamental frequency (F0) and and formants F1-F4 variation were analyzed.
Results. Dispersion of formants F2-F4 frequencies was significantly higher in patients with ischaemic lesion in left hemisphere in comparison to the controls. Fundamental frequency F0 and F1 formant showed similar stability in the both groups.
Conclusions. Lesion in subcortical structures in dominant brain hemisphere cause desynchronization of vowel formants speech components (formants F2-F4), resulting in their higher dispersion within the range of various frequencies. Obtained results suggest that acoustic parameters of speech sounds depend also on central mechanisms of speech.

Abstract

Introduction. The basal ganglia of the dominant brain hemisphere have numerous connections with associating frontal lobe cortex, which has a strategic importance for the programming of the speech, the linguistic and articulation patterns creation. The ischaemic stroke involving basal ganglia can cause aphasic speech disturbances (the subcortical aphasia); the influence of the subcortical lesion on the creation and variability of speech sounds could not be excluded. The aim of the study is the fundamental frequency (F0) and formants F1-F4 estimation of vowel "a" in patients with basal ganglia ischaemic lesion in dominant for speech cerebral hemisphere.
Material and methods. The study comprised 28 right-handed patients (16 women, 12 men; mean age 54,2 years), with ischaemic lesion involving basal ganglia in the left hemisphere and 30 healthy persons (mean age 52,7 years). Computer speech analysis was performed in all persons using acoustic program "Iris". Patients with aphasia and dysarthria were excluded. A vowel "a" pronounced for 5 s was analyzed. Fundamental frequency (F0) and and formants F1-F4 variation were analyzed.
Results. Dispersion of formants F2-F4 frequencies was significantly higher in patients with ischaemic lesion in left hemisphere in comparison to the controls. Fundamental frequency F0 and F1 formant showed similar stability in the both groups.
Conclusions. Lesion in subcortical structures in dominant brain hemisphere cause desynchronization of vowel formants speech components (formants F2-F4), resulting in their higher dispersion within the range of various frequencies. Obtained results suggest that acoustic parameters of speech sounds depend also on central mechanisms of speech.
Get Citation

Keywords

stroke; basal ganglia; acoustic speech analysis

About this article
Title

Influence of ischaemic lesion of left hemisphere in the region of basal ganglia on the variability of acoustic parameters of speech

Journal

Interdisciplinary Problems of Stroke

Issue

Vol 8, No 1 (2006)

Pages

16-21

Published online

2006-01-23

Bibliographic record

Udar Mózgu. Problemy Interdyscyplinarne 2006;8(1):16-21.

Keywords

stroke
basal ganglia
acoustic speech analysis

Authors

Ryszard Podemski
Krzysztof Słotwiński
Konstanty Gurański
Sławomir Budrewicz

Important: This website uses cookies. More >>

The cookies allow us to identify your computer and find out details about your last visit. They remembering whether you've visited the site before, so that you remain logged in - or to help us work out how many new website visitors we get each month. Most internet browsers accept cookies automatically, but you can change the settings of your browser to erase cookies or prevent automatic acceptance if you prefer.

Wydawcą serwisu jest  "Via Medica sp. z o.o." sp.k., ul. Świętokrzyska 73, 80–180 Gdańsk

tel.:+48 58 320 94 94, faks:+48 58 320 94 60, e-mail:  viamedica@viamedica.pl