an overview: nature of the velopharyngeal (vp) mechanism delivery of service linda d....
TRANSCRIPT
An Overview:
Nature of the Velopharyngeal (VP)
Mechanism
Delivery of Service
Linda D. Vallino-Napoli, PhD, MS, CCC-SLP/A
Normal Speech
Ability to coupling* and decoupling* the nasal cavity from the oral cavity (velopharyngeal valving)
–Normal resonance–Normal articulation–Normal phonation
*oral-nasal coupling – nasal sounds*oral-nasal decoupling – oral sounds
Hard Palate(inferior view)
http://www.yorku.ca
Posterior nasal spine
Incisive foramen
Palatine process of maxillary bone
Premaxilla
Nature of VP Mechanism:3 components
Velum Posterior pharyngeal wall
(ppw) Lateral pharyngeal wall (lpw)
Velopharyngeal Closure
In a nutshell…
During normal speech production, the velum moves upward and backward to contact the posterior pharyngeal wall. Simultaneously, the lateral pharyngeal walls move medially to abut against the edges of the velum.* These movements (vp closure)separate the oral and nasal cavities for oral consonants.
*The contribution of these components vary among individuals.
Velopharyngeal Mechanism =
Velum + PPW + LPW
+Velum
PPW LP
WLPW
Function of Soft Palate
Tensor Palati (#1)
Levator Palati (#2) (pulls palate
upward and backward) Palatoglossus (#3)
Palatopharyngeus (#4)
Superior Constrictor (#5) (medial movement of lpw)
Fritzell (1969)
Velopharyngeal Port
at rest (open) during speech
Source: www.choa.org/default.aspx?id=762 (choa=Children’s Healthcare of Atlanta)
Velopharyngeal Inadequacy (VPI)
(“dysfunction” - VPD)
??? VPI
??? VPI??? VPI VP??
VPI (VPD):A definition
Faulty velopharyngeal closure or…
The inability for the velum and related musculature to separate the oral and nasal cavities on oral consonants
Causes of VPI
Cleft VPI– Opening in the palate (cleft palate, large fistula)
Velopharyngeal insufficiency– Short palate– Post adenoidectomy– Post maxillary advancement
Velopharyngeal incompetency– Poor muscle function
Velopharyngeal mislearning– Phonemic-specific nasal emission
Velopharyngeal Inadequacy (VPI)
velumVP gap
Adenoid pad
What happens to speech??????
Effect of VPI on Speech(and…the terminology to describe it)
Hypernasality Nasal air emission* Weak or omitted consonant sounds Articulation errors (compensatory) Facial grimace Phonatory disorders
*not = hypernasality
What Next??????
Delivery of Care
“…children with special health care needs (Koop, 1987)…require comprehensive, coordinated care provided by health care systems that are readily accessible and responsive to the individual needs of the parents and their families.”
(ACPA, Parameters of Care, 2007)
ACPA, Parameters of Care(1993, 2000, 2007)
Optimal care of children with clefts and craniofacial conditions:
Best provided by an interdisciplinary team of specialists
From neonatal period through adulthood - until all management needs are met
Team Composition
Audiology Dentistry Genetics Oral maxillofacial surgery Plastic surgery Psychology Speech-language pathology Patient and caregivers
Team Responsibilities
Recognize the needs of each patient and assist in providing all services needed to complete care
Evaluate patients at regular intervals Hold regularly scheduled meetings to discuss
findings Develop treatment plan based on patient needs Maintain comprehensive records for each
discipline Communicate findings & recommendations Collaborate with providers in the community
Birth of the CLP TeamLancaster Cleft Palate Clinic - 1938
Photo: Courtesy of Dr. Ross Long, Jr.
Referring to a Team
When a child has a cleft or craniofacial disorder
When a resonance disorder or VPI is suspected
Where do you find a team?
www.acpa-cpf.org
www.cleftline.org
http://www.cleftline.org/team_listings/state_dfg
Summary
Cleft and other conditions affecting VP function can present complex problems
Careful evaluations are essential to making an appropriate diagnosis and planning effective treatment
Interdisciplinary team management is the standard of care for these patients
AcknowledgementsAcknowledgements
Ross Long Jr, DMD, PhD (Lancaster Cleft Palate Program) for the photos of the Lancaster Cleft Palate Team.
ASHA and ACPA for sponsoring this symposium
Thank you very much.
ReferencesReferencesNature of VP FunctionNature of VP Function
Peterson-Falzone SJ, Hardin-Jones, MA, Karnell MP. Cleft Palate Speech. 3rd ed. St. Louis (MO): Mosby, Inc. 2001.
Zemlin WR. Speech and hearing science: anatomy and physiology. 4th ed. Englewood Cliffs (NJ): Prentice-Hall, 1997.
Delivery of CareDelivery of CareResourcesResources
http://www.acpa-cpf.org/teamcare/Parameters07rev.pdf
Contact ACPA, Cleft Palate Foundation, or your local team