W9 - articulation Flashcards
Articulation
the formation of clear & distinct sounds in speech
articulation - functions
- Involved coordinated movements of the lips, tongue, teeth, palate & respiratory system
articulation - disorders
~ children may have problems forming particular speech sounds (lisp)
~ may not be able to produce a particular sound (wabbit – rabbit)
vowels
- produced with open tract
- consonant - produced with partial closure
consonants
- articulated occurs in the vocal tract
- manner = obstruction of the airflow is achieved
- voicing
articulation structures
- TMJ
- oral cavity
- muscles of face
- tongue
- velum / soft palate
lips
Muscles need nerve supply = facial nerve (CNVII)
With all sounds we shape our lips & the shape depends on the consonant vowel we are producing
articulation - tongue dysfunction
- tongue musculature (due to nerve damage/surgery such as in the head & neck cancer)
- This can impact the ability to correctly produce sounds that require tongue movements, such as alveolars
trigeminal nerve dysfunction
- Sensory loss = inaccurate or absent sensory feedback about placement of articulators
- Motor impairment = ability to effectively move jaw for vowel & consonant movement
velum - consonant production
- Soft palate closes against the back of the throat (Velopharyngeal closure)
- Expired air channeled through oral cavity to produce nasal sounds (n, m, ng)
velum dysfunction
Velopharyngeal insufficiency (VPI)
- the soft palate does not close tightly against the back of the throat, leading to air coming out the nose
- This can cause speech that is difficult to understand and hyper nasal
velum dysfunction CAUSES
- cleft palate
- traumatic brain injuries or neurological disorders can also result in velopharyngeal incompetence
cleft palate
- an opening or split in the roof of the mouth that occurs when the tissue doesn’t fuse together during development in the womb
cleft palate components
Anterior part – hard palate (made up of the bone)
Posterior part – soft palate (made of muscle)
Submucous cleft palate (mucous membrane covering the palate)
cleft palate effects
- speech
- feeding
- hearing
-dentition