title: Phonologic and Acoustic Analysis of Speech Following Glossectomy and the Effect of Rehabilitation on Speech Outcomes.
abstract: OBJECTIVE
  Changes in acoustic features in the perioperative phase for elucidating the mechanisms of articulation disorder and the effect of perioperative rehabilitation were studied prospectively.
  
  
  METHODS
  Sixty-two patients with 62 tongue cancer were divided into a partial glossectomy group (n = 40) and a reconstruction group (n = 22). Acoustic characteristics were analyzed during the preoperative and postoperative periods and after rehabilitation using the first and second formants of the vowels /a/, /i/, and /u/; the triangular vowel space area (tVSA); and the slopes of formant transitions.
  
  
  RESULTS
  In the 2 groups, decreases in the tVSA and formant slopes were found from the preoperative to the postoperative period, and the acoustic characteristics of the reconstruction group especially improved to preoperative values after rehabilitation. Analysis of the postoperative period showed that acoustic characteristics were altered at the site of surgical resection.
  
  
  CONCLUSIONS
  Changes of acoustic variables are related to excision size and site, suggesting the distinctive tongue portion for the articulation of each speech sound. Perioperative rehabilitation could activate the articulators and increase the range of movement of the remaining tongue, especially the preserved anterior tongue.
authors.affiliation: SLHT, Department of Rehabilitation, Aichi Cancer Center Hospital, Aichi; PhD Student, Department of Speech Pathology, Aichi-Gakuin University, Aichi, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Takatsu
authors.affiliation: Medical Director, Department of Head and Neck Surgery, Aichi Cancer Center Hospital, Aichi, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Hanai
authors.affiliation: Medical Director, Department of Head and Neck Surgery, Aichi Cancer Center Hospital, Aichi, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Suzuki
authors.affiliation: Department Head, Department of Rehabilitation, Aichi Cancer Center Hospital, Aichi; Medical Director, Department of Orthopedic Surgery, Aichi Cancer Center Hospital, Aichi, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yoshida
authors.affiliation: SLHT, Department of Neurology, Nagoya University Graduate School of Medicine, Aichi, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tanaka
authors.affiliation: Assistant Professor, Faculty of Health Care Sciences, Himeji Dokkyo University, Hyogo, Japan.
authors.forename: Seiya
authors.initials: S
authors.lastname: Tanaka
authors.affiliation: Department Head, Department of Head and Neck Surgery, Aichi Cancer Center Hospital, Aichi, Japan.
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Hasegawa
authors.affiliation: Professor, Department of Speech Pathology, Aichi-Gakuin University, Aichi, Japan. Electronic address: ymasahik@dpc.agu.ac.jp.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Yamamoto
mesh_terms: D000328:Adult; D000368:Aged; D001184:Articulation Disorders / Q000503:physiopathology* / Q000534:rehabilitation*; D005260:Female; D005927:Glossectomy / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000503:physiopathology* / Q000534:rehabilitation*; D011446:Prospective Studies; D013061:Speech Acoustics; D014062:Tongue Neoplasms / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult