Articulation Disorders

Articulation Disorders - Say What Now?

• Definition: Difficulty with physical production of specific speech sounds (phonetic).
• Vs. Phonological: Articulation: motor sound production; Phonological: language-based error patterns.
• Prevalence: Common, ~3-16% of children.

⭐ Most common Speech Sound Disorder (SSD).

Articulation Disorders - Alphabet Soup Upside Down

📌 SODA: Key types of articulation errors.

• Classification:
  • Organic: Due to physical causes.
    • Structural: e.g., cleft palate, malocclusion.
    • Motor/Neurological: e.g., dysarthria, apraxia.
    • Sensory: e.g., hearing loss.
  • Functional: No identifiable organic cause; developmental.

⭐ Substitutions are the most frequent type of articulation error.

Articulation Disorders - Why the Tongue Twists

Why speech sounds go awry:

• Organic Causes: Identifiable physical reason.
  • Structural Defects:
    • Cleft palate/lip (incomplete fusion of oral structures).
    • Dental malocclusions (misaligned teeth).
    • Ankyloglossia (tongue-tie).
    • Macroglossia (enlarged tongue).
  • Motor/Neurological Issues:
    • Dysarthria (muscle weakness affecting speech).
    • Childhood Apraxia of Speech (CAS) (difficulty planning speech movements).
    • Cerebral Palsy (motor control difficulties).
  • Sensory/Perceptual Problems:
    • Hearing impairment (difficulty perceiving speech sounds).
• Functional Causes: No known organic cause.
  • Often related to faulty learning of sound patterns.

⭐ A hearing loss greater than 25-30 dB HL can significantly impact speech sound development and articulation clarity in children.

Articulation Disorders - Diagnostic Detective

• Assessment Cornerstones:
  • Case History: Medical, developmental, family background.
  • Oral Mechanism Exam (OME): Assesses articulator structure/function. 📌 Let's Talk Pal, Voice Joyfully (Lips, Tongue, Palate, Velum, Jaw).
  • Speech Sound Assessment: Standardized tests (e.g., GFTA), articulation tests.
  • Stimulability Testing: Can child produce sound with cues?
• Diagnostic Pathway:

• Differential Diagnosis Highlights:

  Feature	Articulation Disorder	Phonological Disorder	Dysarthria	Apraxia of Speech
  Primary Issue	Motor production	Linguistic rules	Muscle control	Motor planning
  Error Type	Consistent phonetic	Pattern-based	Distortions, weak	Inconsistent, groping
  Muscle Tone	Normal	Normal	Abnormal (weak/spastic)	Normal

⭐ Inconsistent speech sound errors, especially with groping, strongly suggest Childhood Apraxia of Speech (CAS).

Articulation Disorders - Therapy Toolkit

• General Principles: Therapy utilizes motor learning principles for speech sound acquisition.
• Traditional/Phonetic Approach (Van Riper's Hierarchy):

📌 Mnemonic (Van Riper's): **I** **S**aw **W**alton **P**raying **S**lowly, **C**arefully.

• Specific Techniques:
  • Phonetic placement: Guiding articulators to the correct position.
  • Auditory discrimination: Distinguishing between correct/incorrect sounds.
  • Modeling: Clinician provides correct production.
  • Shaping: Using a known sound to achieve a new sound.
• Role of Parents/Caregivers: Essential for home practice and generalization.
• Prognostic Indicators:
  • Stimulability: Ability to imitate the correct sound.
  • Severity of disorder.
  • Co-occurring conditions (e.g., hearing loss).

⭐ Good stimulability for a sound is a positive prognostic indicator for articulation therapy.

High‑Yield Points - ⚡ Biggest Takeaways

• Articulation disorders: Inability to physically produce speech sounds correctly.
• Remember SODA for error types: Substitution, Omission, Distortion, Addition.
• Causes: Organic (cleft palate, dysarthria, hearing loss) or Functional (no known cause).
• Distinguish from phonological disorders (rule-based errors) & apraxia of speech.
• Key assessments: Speech sound inventory, oral-motor exam, stimulability testing.
• Speech therapy is the primary intervention, targeting accurate sound production.
• Most common are developmental articulation disorders in children; always rule out hearing loss.