Articulation Disorders

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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.
Age (Yrs)Key Sounds Acquired (Indicative)
~3p, b, m, n, t, d, k, g
~4-5f, s, sh, ch, j, l
~6-7r, v, z

⭐ Most common Speech Sound Disorder (SSD).

Articulation Disorders - Alphabet Soup Upside Down

📌 SODA: Key types of articulation errors.

Error TypeDescriptionExample
SubstitutionOne sound replaced by another"wabbit" for "rabbit"
OmissionSound deleted from a word"at" for "cat"
DistortionSound produced inaccuratelyLisped /s/ (e.g., "thun")
AdditionExtra sound inserted"buhlue" for "blue"
  • 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). Normal vs. Tongue-tie (Ankyloglossia)
    • 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:

    FeatureArticulation DisorderPhonological DisorderDysarthriaApraxia of Speech
    Primary IssueMotor productionLinguistic rulesMuscle controlMotor planning
    Error TypeConsistent phoneticPattern-basedDistortions, weakInconsistent, groping
    Muscle ToneNormalNormalAbnormal (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.

Practice Questions: Articulation Disorders

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Flashcards: Articulation Disorders

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Speech audiometry consists of _____ and SDS.

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Speech audiometry consists of _____ and SDS.

SRT

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