Thyroidectomy and Voice

About the Author III

Preface IV

Acknowledgments V


PART 1. Post - thyroidectomy syndrome(PTS) 1

01 Anatomical perspectives 3

02 Hormonal perspectives 25

03 Neuropsychological perspectives of PTS 33


PART 2. Role of the thyroid gland related structures in phonation 43

04 Role of the neck muscles in phonation -animal study- 45

05 Role of vertical laryngeal movements in pitch control -human study- 67

06 Roles of two bellies of cricothyroid muscle in pitch control -animal study- 81

07 Role of two bellies of cricothyroid muscles in speech production -human study- 97

08 Role of cricopharyngeus muscle in speech production -human study- 109


PART 3. Phonetic characteristics of thyroidectomized patients without laryngeal nerve injury 123

09 Phonetic features of hypothyroidism after thyroidectomy 125

10 Phonetic features of speech after thyroidectomy 147

11 Changes of oral vowel sounds and hyoid bone movements after thyroidectomy 163

12 Evaluation of swallowing function after thyroidectomy 179

13 Cepstral analysis of voice in patients with thyroidectomy 193


PART 4. Phonetic characteristics of thyroidectomized patients with laryngeal nerve injury 207

14 Endoscopic features of unilateral vocal fold paralysis 209

15 Diplophonia in unilateral vocal fold paralysis 225

16 Antero-posterior medialization thyroplastyfor unilateral vocal fold paralysis 245

17 Phonetic features in patients with bilateral vocal fold paralysis without tracheotomy 259


PART 5. Non-recurrent laryngeal nerves 275

18 Travelling characteristics of the non-recurrent laryngeal nerves 277

19 Coexistence of non-recurrent laryngeal nerves with inferior laryngeal nerves 295


PART 6. Others 307

20 Phonetic characteristics of patients with an ectopic lingual thyroid 309

21 Chyle leakages and characteristics of lymphatics in the central neck area after thyroidectomy 325

22 New diagnostic tool for thyroid cancer using Electrical Impedance Spectroscopy(EIS) 337


Index 353