Objective vowel sound characteristics and their relationship with motor dysfunction in Asian Parkinson's disease patients.

Background: Speech impairments are very common in patients with Parkinson's disease (PD). However, knowledge of their objective characteristics and relationship to other motor symptoms amongst Asian PD patients is limited.

Objectives: To identify objective vowel sound characteristics in Thai PD patients and correlate with disease severity, as determined by UPDRS and various sub-scores.

Dysarthric speech characteristics of Thai stroke patients.

The dysarthric speech characteristics of 14 Thai stroke patients were assessed by Computerized Articulation Test program 1. Each speaker had been tested for speech correctness of all Thai phonemes. As the results, the error patterns were analyzed.