Rebecca J. Leonard, PhD

Professor – Voice and Swallowing
UC Davis Health System
Department of Otolaryngology

Dr. Leonard’s primary clinical interests are in the areas of voice and swallowing. She is one of a growing number of professionals in the field who has extended her scope of practice to include laryngeal imaging, stroboscopy, and other instrumental methods, and who, with an otolaryngologist, combine to form a specialty practice in laryngology/voice/swallowing. Dr. Leonard has been a vocal proponent at state and national levels for the development of standards of practice and training pertinent to this emerging specialty area.

Research interests include normal and disordered swallowing, changes in swallowing across the life span, aversive effects on the larynx and voice associated with environmental stimuli and the effects of ablative procedures on voice, speech and swallowing. She is a Fellow of the American Speech-Language-Hearing Association.

Education

1976 Ph.D., Purdue University, West Lafayette, Indiana
Major: Speech Pathology/Speech Sciences

1972 M.S., Purdue University, West Lafayette, Indiana
Major: Speech Pathology

1967 A.B., Indiana University, Bloomington, Indiana
Major: Speech Pathology

Board Certification

American Speech, Language and Hearing Association Certification of Clinical Competence in Speech Pathology, 1979

Professional Societies

California Speech, Language and Hearing Association

American Speech, Language and Hearing Association

Dysphagia Research Society

Voice Foundation

Publications

Dr. Leonard has authored or co-authored 2 books, 2 manuals and numerous chapters in professional texts. She is a reviewer for a number of professional journals. Publications include:

2008 – Leonard R, McKenzie S, Belafsky P. Pharyngeal adaptation in Zenker’s diverticulum — the “Faux-PES.” Submitted, Otolaryngol Head NeckSurg. 2008.

2007 – Leonard R and Kendall KA. (eds) Dysphagia Assessment and Treatment Planning (2nd ed.), Plural Publishing, Co.: San Diego, CA.,.

2007 – Leonard R, Belafsky PC, Rees CJ. Relationship between fluoroscopic and manometric measures of pharyngeal constriction: the pharyngeal constriction ratio. Ann. Otol. Rhinol. Laryngol. 2007 115:897-901.

2007 – Blumenfeld L, Hahn Y, Lepage A, Leonard R, Belafsky PC. Transcutaneous electrical stimulation versus traditional dysphagia therapy: A nonconcurrent cohort study. Otolaryngol. Head Neck Surg. 2006 135, 754-757.

2006 – Leonard R, McKenzie S, Hyoid –bolus transit latencies in normal swallow. Dysphagia, 2006 32:183-190.

2006 – Yip H, Leonard R, Belafsky PC. Can a fluoroscopic estimation of pharyngeal constriction predict aspiration? Otolayngol. Head Neck Surg. 2006 135:215-217.

2006 – Yip HT, Leonard R, Kendall K. Impact of vocal fold medialization on pharyngeal transit time and incidence of aspiration. Ann. Otology, Rhinology & Laryngology, in press.

2006 – Yip HT, Leonard R, Kendall K. Cricopharyngeal myotomy normalizes the opening size of the upper esophageal sphincter in cricopharyngeal dysfunction. Ann. Otology, Rhinology & Laryngology, 116:93-96.

2005 – Leonard R, Kendall K. Effects of voice therapy on vocal process granuloma – A Phonoscopic Approach. Am. J. Otolaryngology, 2005 26: 101-107.

2005 – Andrews M, Bless D, Boone, et al. Classification manual for voice disorders. Lawrence Erlebaum Associates, Mahwah, NJ, in press.

2005 – Colton R, Casper J, Leonard R: Understanding voice problems, 3rd Edition, Lippincott Williams and Wilkins, Philadelphia, PA, in press.

2005 – Yip HT, Leonard R, Kendall K. Impact of vocal fold medialization on pharyngeal transit time and incidence of aspiration. Ann. Otology, Rhinology & Laryngology, in press.

2005 – Yip HT, Leonard R, Kendall K. Cricopharyngeal myotomy normalizes the opening size of the upper esophageal sphincter in cricopharyngeal dysfunction. Ann. Otology, Rhinology & Laryngology, in press.

2005 – Leonard R, McKenzie S, Hyoid -bolus transit latencies in normal swallow. Dysphagia, Submitted.

2004 – Kendall KA, Leonard R, McKenzie S. Airway protection: evaluation with videofluoroscopy. Dysphagia, 2004 19(2): 65-70.

2004 – Kendall K, Leonard R, McKenzie S. Common medical conditions in the elderly: impact of pharyngeal bolus transit. Dysphagia, 2004 19(2): 71-77

2004 – Leonard R, Kendall K, McKenzie S: Structural displacements affecting pharyngeal constriction in nondysphagic elderly and nonelderly adults. Dysphagia, 2004 19(2): 133-141.

2004 – Leonard R, Kendall K, McKenzie S: UES opening and cricopharyngeal bar in nondysphagic elderly and nonelderly adults. Dysphagia, 2004 19(3): 182-191.

2004 – Leonard R, Kendall K. Effects of voice therapy on vocal process granuloma – A Phonoscopic Approach. Am. J. Otolaryngology, in press.

2003 – Kendall K, Leonard R, McKenzie S: “Sequence variability during hypopharyngeal bolus transit”. Dysphagia. 2003 Spring; 18(2): 85-91.

2002 – Kendall K, Leonard R: Videofluoroscopic upper esophageal sphincter function in elderly dysphagic patients. Laryngoscope. 2002 Feb;112(2):332-7.

2002 – Leonard R, Dworkin J, Meleca R, Colton R, Leeper, HA, Till J: “Assessment of the disordered voice: A roundtable discussion”. Journal of Medical Speech-Language Pathology. 2002 10(2); 111-131.

2001 – Kendall K, Leonard R, McKenzie SW: “Accommodation to changes in bolus viscosity in normal deglutition: A videofluoroscopic study.” Annals of Otology, Rhinology & Laryngology. 2001 Nov; 110(11): 1059-65.

2001 – Kendall K, Leonard R: “Bolus transit and airway protection coordination in older dysphagic patients.” Laryngoscope. 2001 Nov; 111 (11 Pt 1): 2017-21.

2001 – Leonard R, “Ablative procedures of the head and neck: implications for speech and swallowing.” Chapter in: Donald P. Head and Neck Cancer: Management of the Difficult Case. W.B.Saunders Co., Philadelphia, PA, in press.

2001 – Kendall K, Leonard R: “Hyoid movement during swallowing in older patients with dysphagia.” Archives of Otolaryngology, 127: 1224-1229.

2001 – Leonard R, Kendall K: “Phonoscopy-a valuable tool for otolaryngologists and speech-language pathologists in the management of dysphonic patients.” Laryngoscope, 111(10): 1761-1767.

2000 – Kendall K, Leonard R: “Pharyngeal constriction in dysphagic elderly patients.” Dysphagia, 16(4): 272-278.

2000 – Leonard R, Kendall K, Johnson R, McKenzie S: “Swallowing in myotonic muscular dystrophy: A videofluoroscopic study.” Archives of Physical Medicine and Rehabilitation, 82(7): 979-985.

2000 – Leonard R, Kendall K, McKenzie S, Goncalves MI, Walker A: “Structural displacements in normal swallowing: A videofluoroscopic study.” Dysphagia, 15: 146-152.

2000 – Kendall K, McKenzie S, Leonard R, Goncalves MI, Walker: “Timing of events in normal swallowing: A videofluoroscopic study.” Dysphagia, 15: 74-83.

2000 – Kendall K, McKenzie S, Leonard R: “Timing of swallowing events after single modality treatment of head and neck carcinomas with radiation therapy.” Annals of Otology, Rhinology & Laryngology, 109(8): 767-775.

1999 – Leonard R: “‘Functional’ dysphonia in a 63-year-old male.” Phonoscope 2:(1) 59-72.

1999-Burnett G, Leonard R: “Use of Kodak EktaPro high speed digital cameras in laryngoscopy.” Phonoscope 2:(1) 33-40.

1999 – Leonard R, Kendall K: “Dysphagia secondary to cricopharyngeal achalasia.” Phonoscope 2:(2) 123-128.

1999 – Leonard R: “Dysphagia secondary to cricopharyngeal achalasia and CVA.” Phonoscope 2:(3) 167-173.

1999 – Kendall K, Leonard R: “Dysphagia: Recent advances in assessment and treatment.” Current Opinion in Otolaryngology and Head and Neck Surgery. 7:107-111.

1999 – Leonard R: “Voice therapy: Objectives and outcomes.” Phonoscope. 2:(4) 217-226.

1999 – Leonard R, Kendall K: “Differentiation of spasmodic and psychogenic dysphonias with phonoscopic evaluation.” Laryngoscope. 109: 295-300.

1998 – Leonard R, Goncalves M: “Speech rehabilitation post-glossectomy.” Chapter in Robbins T and Murry T. Head and Neck Cancer: Organ Preservation, Function, and Rehabilitation. Singular Publishing Group, Inc., San Diego.

1998 – Goncalves M, Leonard R: “A hardware-software system for analysis of video images.” J Voice, 12:(2) 143-150.

1998 – Leonard R: “Dysphagia secondary to shunt malfunction with uncal herniation in 13-year-old male with cerebral palsy and hydrocephalus.” Phonoscope. 1:(1) 83-85.

1998 – Leonard R: “Complications resulting from botulinum toxin injection in a 43-year-old female with abductor spasmodic dysphonia.” Phonoscope. 1:(2) 151-154.

1998 – Leonard R: “Graphic display of quantitative data from videofluoroscopic swallow studies – STD plots (swallow time-displacement-duration plot).” Phonoscope. 1:(3) 219-224.

1998 – Leonard R: “Muscular dystrophy with initial complaint of dysphagia.” Phonoscope. 1:(3) 229-235.

1998 – Leonard R: “Stimulus generator: A computerized tool for voice therapy.” Phonoscope. 1:(4) 265-272.

1998 – Kendall K, McKenzie S, Leonard R: “Structural mobility in deglutition after single modality treatment of head and neck carcinomas with radiation therapy.” Head and Neck. 20:(8) 720-725.

1997 – Kendall K, Leonard R: “Treatment of ventricular dysphonia with botulinum toxin.” Laryngoscope. 107(7) 948-53.

1997 – Leonard R, Kendall K, eds. Dysphagia Assessment and Treatment Planning: A Team Approach. Singular Publishing Group, Inc, San Diego, Ca. Also author or co-author of the following chapters: Introduction; Dynamic swallow study: Objective measures and normative data., Chapter 8, 101-125; Dynamic swallow study: Instrumentation and measurement techniques. Chapter 9, 127-160; Swallow evaluation with flexible videoendoscopy, Chapter 10,161-180; The treatment plan; Chapter 11, 181-210; Appendix: CD-ROM.

1996 – Leonard R, Izdebski, K: “Preoperative voice therapy: Indications, basis, strategies.” In Elsevier Science Series, Proceedings of the First World Voice Congress, Oporto, Portugal.

1996 – Leonard R, Izdebski K: “Laryngeal imaging with stroboscopy: Its value in therapeutic assessment.” Elsevier Science Series, Proceedings of the First World Voice Congress, Oporto, Portugal.

1995 – Leonard, R.: “Speech characteristics in speakers with glossectomy and other oral/oropharyngeal ablation.” Chapter in Bernthal J: Child Phonology: Characteristics, Assessments, and Intervention with Special Populations. Thieme Medical Publishers, New York.

1995 – Leonard R, Charpied G, Faddis B: “Effects of chronic ozone (03) on vocal fold mucosa in primates.” J Voice. 9:(4) 433-448.

1994 – Leonard, R, Poza T: Soundscope – Manual of Clinical Applications. Published by G.W. Instruments, Inc., Somerville, MA.

1992 – Sievers A, Leonard R, McKenzie S: “The safe use of an adaptive early feeding device for impaired patients.” ORL-Head & Neck Nursing. 10:17.

1992 – Loeb R, Jones B, Leonard R, Behrman K: “Recognition accuracy of current operating room alarms.” Anesth Analg. 75:499-505.

1992 – Leonard R, Goodrich S, McMenamin P, Donald P: “Differentiation of speakers with glossectomies by acoustic and perceptual measures.” American Journal of Speech-Language Pathology–” Journal of Clinical Practice. 1:(2) 56-62.

1992 – Leonard R: “Use of laryngeal imaging procedures.” “ASHA” (J Am Speech Lang Hearing Assoc) 34:(5) 69-71.

1992 – Leonard, R, Senders C, Charpied, G: “Effects of long-term intubation on vocal fold mucosa in dogs.” J Voice. 6:(1) 86-93.

1991 – Leonard R, Charpied G, Gallia, L: “Recovery of vocal fold mucosa from laser incision.” J Voice. 6: (3) 286-291.

1991 – Leonard R, Charpied G, Faddis B: “Effects of ambient inhaled ozone on vocal fold mucosa in bonnet monkeys.” J Voice. 5:(4) 304-309.

1991 – McKenna J, Fonataro-Clerici L, McMenamin P, Leonard R.: “Laryngeal cancer: Diagnosis, treatment and speech rehabilitation.” Am Fam Physician. 44:(1) 125-129.

1991 – Leonard R: “Computerized design of speech prostheses.” J Prosth Dentistry. 66:(2) 224-230.

1990 – Leonard R, Gillis R: “Differential effects of speech prostheses in glossectomized patients.” J. Prosth Dentistry. 64:(6) 701-708.

1990 – Leonard R, Poza T: MacSpeech Lab – Manual of Clinical Applications G.W. Instruments: Cambridge, MA.

1988 – Leonard R, Ringel R, Horii Y, Daniloff R: “Vocal shadowing in singers and nonsingers.” J Speech and Hearing Res. 31: 54-61.

1988 – Leonard R, Gallia L, Charpied G: “Effects of stripping and laser excisions on vocal fold mucosa in cats.” Ann Otol Rhinol and Laryngol. 97:159-163.

1988 – Leonard R: “Communication disorders in childhood. Chapter in Hudson W, Reinhard M: Manual of Preventative Services. Little, Brown & Co., Boston, MA.

1987 – Leonard R, Ringel R., Daniloff R, Horii Y: “Voice frequency change in singers and non-singers.” J Voice. 1:234-239.

1985 – Leonard R, Kiener D, Charpied G: “Effects of repeated stripping on vocal fold mucosa in cats.” Ann Otol Rhinol and Laryngol. 3:258-262.

1984 – Leonard, R: “Problems in speech rehabilitation of patients with head and neck cancer.” Chapter in: Donald, PJ, Head and Neck Cancer Management of Difficult Case. W.B. Saunders Company, Philadelphia.

1983 – Gillis R, Leonard R: “Prosthetic treatment for speech and swallowing in patients with total glossectomy.” J. Prosth Dentistry. 50:(6) 808-814.

1983 – Leonard R, Gillis R: “Effects of a prosthetic tongue on vowel formants and isovowel lines in a patient with total glossectomy.” J. Speech and Hearing Disorders. 48:(4) 423-426.

1982 – Leonard R, Gillis R: “Effects of a prosthetic tongue on vowel intelligibility and food management in a patient with total glossectomy.” J. Speech and Hearing Disorders. 47: 25-30.

1980 – Sorenson D, Horii Y, Leonard R: “Effects of laryngeal topical anesthesia on voice fundamental frequency perturbation.” J Speech and Hearing Res. 23: 274-283.

1979 – Leonard R, Ringel R: “Vocal shadowing under conditions of normal and altered laryngeal sensation.” J Speech and Hearing Res. 23: 274-281.

1975 – Leonard R, Brown R, Ringel R: “Hall probes applied to the measurement of articulatory dynamics.” Purdue University Contributed Papers. 5: 94-102.

1975 – Leonard R, Horii Y, Daniloff R: “Vocal shadowing of square wave modulated tones.” Purdue University Contributed Papers. 5: 63-114.