Formation of oral diadochokinesis standads to evaluation adult motor speech disorders in Turkish language

74 VIII. SUMMARY Formation of Oral Diadochokinesis Standards to Evaluate Adult Motor Speech Disorders in Turkish Language As yet Turkish standards for diadochokinesis, second formant transition and voice tremor have not been established. The aim of this study is to establish average levels for Turkish by using the CSL 4300 acoustic anaysis programme motor speech standards. For this reason DDK ratios, second Formant transitions and tremor parameters were evaluated. This study was, aged between 18-60 (Age average: Man: 37,4 age, Women: 34,1 age), 103 normal subject ( 47 Women, 56 Men), aged between 25- 58, 20 neurological disorders patient, M:43,7. W: 49,5 age, 10 women, 10 man (Parcinsonism (10 Subject), CVA (5 Subject), MS (3-Subject), Cerebellar Ataxia (2 Subject) patient.) evulated. Participants in this study were evauated by an ENT doctor and an audiologist. Recordings were made in a sound proof room and were analysed by the computerised speech laboratory of the KAY Elemetrics CSL 4300B system. Correlations were worked out taking into consideration differences between male and female speech motor performance profiles, differences between languages and differnces between neurological diseases. Turkish average values for each parameter were found. Skewness and Kurtosis values were calculated. DDK performance speech motor parameters showed no significant differences between sexes. However, male subjects had higher values than female subjects. Significant differences between the normal group and the test group (patients with neurological disorders) were obtained. Significant differences in DDK parameters (DDK avp, DDK avr, DDK sdp, DDK cvp, DDK Jit., DDK sdi, DDK cvi, DDK maxa, DDK ava, DDK sla) show that neurological disorders have a negative effect on DDK performance. Significant diffrences were found between male and females on all second formant transition parameters (F2magn, F2rate, F2reg, F2aver, F2min, F2max).75 These diffences occur because of differences in male and female anatomy and physiology. Significant differences for "F2aver" and "F2rate" between the neurology group and the control group were also observed. Parameters "Mftr" and "Matr" were found to higher for the neurological group. (This group had increased voice tremors). The presence of neurological disorders leads to a calcuable decrease in Fo. This indicates a change in voice intonation for this group. The results of this study show that speech motor profiles defined by DDK parameters are faster for men than women and people with neurological disorders show a decrease in DDK rates. The neurological group obtained lower scores on "F2aver" and "F2rate" parameters and this leads to decreased intelligibility. Fo is negatively affected in people with neurological disorders and this causes changes in intonation. Key Words: Articulation disorders, diadochokinetic performance, speech disorders, tremor, second Formant transitions, fundamental frequency and voice quality.