Glottal Vibration After Hirano's Reconstruction Following Hemilaryngectomy
An ultra-high-speed cinematographic investigation
1978 Volume 24 Issue 5 Pages 831-849
Details
1978 Volume 24 Issue 5 Pages 831-849
Glottal vibration of four cases which had received glottal reconstruction by Hirano's technique was investigated with the use of ultra-high-speed photography. Twenty successive cycles was studied with frame-by-frame analysis. The results are as follows:
1. The fundamental period varied to a great extent. Its cycle-to-cycle variation, however, did not markedly differ from the normal.
2. Variation in the amplitude of glottal area curve was greater than that of normal subjects.
3. OQ and SI did not differ from those of normal subject. Their variation was in normal range.
4. The amplitude of horizontal excursion of the unaffected vocal fold was normal. Its variation, however, was much greater than the normal.
5. The speed of lateral excursion of the unaffected vocal fold was in normal range, but that of medical excursion was faster than the normal in some subjects. Variation of the speed was greater than the normal.
6. The bulge which had been constructed surgically showed very small and irregular vibrations.
