Praxis SLP Dysphagia Study Guide: Anatomy, Stages, and Must-Know Concepts

If there's one topic that sinks otherwise-strong Praxis 5331 candidates, it's dysphagia. Many graduate programs treat it as a single 14-week course, externships are inconsistent, and ETS knows it — so dysphagia questions show up in every content area of the test. Here's the focused review you need.

The four phases of swallowing — memorize cold

1. Oral preparatory phase — bolus formation. Voluntary. Cranial nerves V (mastication), VII (lip seal, buccal tension), and XII (tongue).
2. Oral transit phase — bolus propelled posteriorly to the faucial pillars. Voluntary. Same cranial nerves, plus IX for posterior tongue.
3. Pharyngeal phase — swallow reflex triggers. Involuntary. Velum elevates (X), larynx elevates and closes, UES opens. Cranial nerves IX, X (vagus), and XI dominate. The dangerous phase for aspiration.
4. Esophageal phase — peristalsis carries the bolus to the stomach. Involuntary. Cranial nerve X.

Aspiration vs. penetration — know the difference

• Penetration — material enters the laryngeal vestibule but stays at or above the vocal folds.
• Aspiration — material passes below the true vocal folds into the trachea.
• Silent aspiration — aspiration with no cough or overt clinical sign. Common in stroke, dementia, and Parkinson's. This is why instrumental assessment matters.

Instrumental assessments

MBSS (VFSS) — the modified barium swallow study

• Fluoroscopic, real-time, lateral and A-P views.
• Visualizes all four phases including esophageal screen.
• Best for: identifying timing of aspiration, residue patterns, structural issues.
• Limitations: radiation exposure, barium ≠ real food, hospital setting.

FEES — fiberoptic endoscopic evaluation of swallowing

• Endoscope through the nose, viewing the pharynx and larynx directly.
• No radiation, can use real food, repeatable, bedside-friendly.
• Best for: secretion management, sensation testing, fatigue across a meal.
• Limitation: "white-out" during the actual swallow — you don't see the moment of swallow itself.

Compensatory strategies vs. rehabilitative exercises

ETS loves this distinction. Compensatory = changes the swallow right now but doesn't strengthen anything. Rehabilitative = strengthens or reorganizes function over time.

Compensatory

• Chin tuck — narrows airway entrance, widens vallecular space.
• Head turn (to weak side) — closes off the weak side.
• Head tilt (to strong side) — uses gravity on the strong side.
• Diet modification — IDDSI levels (0 thin → 4 pureed; foods 3 liquidised → 7 regular).

Rehabilitative

• Mendelsohn maneuver — voluntary prolongation of laryngeal elevation. Strengthens suprahyoids.
• Effortful swallow — increases tongue base retraction and pharyngeal pressure.
• Masako (tongue-hold) — strengthens posterior pharyngeal wall movement. Do not use during meals.
• Shaker — head-lift exercise. Strengthens suprahyoids → improves UES opening.
• EMST (expiratory muscle strength training) — improves cough strength and submental muscle activation.

IDDSI levels — at minimum, know these

• Drinks 0–4: Thin → Slightly thick → Mildly thick → Moderately thick → Extremely thick.
• Foods 3–7: Liquidised → Pureed → Minced & moist → Soft & bite-sized → Regular (with Easy-to-Chew variant).

Red-flag clinical signs

• Wet/gurgly vocal quality after swallow → laryngeal residue.
• Coughing or throat-clearing during/after meals.
• Recurrent pneumonia of unknown origin → suspect silent aspiration.
• Significant unintentional weight loss.
• Prolonged meal times (>30–40 min consistently).

The Praxis-style question pattern

Dysphagia items almost always look like: "A 72-year-old patient with a left MCA stroke presents with wet vocal quality after thin liquids and a delayed swallow trigger on MBSS. Which of the following is the most appropriate first recommendation?" The answer is rarely the most aggressive intervention. ETS usually wants the least restrictive evidence-based option that addresses the specific finding. For more on how this fits into the test as a whole, see our content-area breakdown and the honest difficulty review.