8.1 Swallowing Flashcards
- involves CN 5,7,12
- voluntary
- indirectly affects swallowing
- which phase?
preparatory
- voluntary
- elevation of tongue and palate to push food bolus into pharynx, closure of soft palate against pharyngeal wall to prevent nasal reflux
- initiated by CN12
oral phase
- closure of vocal folds and laryngopharyngeal vestibule
- elevation of larynx, lowering of epiglottis over laryngeal vestibule
- peristaltic contraction of pharyngeal constrictor, relaxation of cricopharyngeus
pharyngeal phase
peristaltic propulsion of bolus down esophagus, involuntary
esophageal phase
preparatory and motor initiation of reflex, motor control
hypoglossal nucleus
CN 9, afferent that triggers reflex, sensory
solitary nucleus
tongue weakness due to CN12 or numbness of soft palate (CN9)
initiation-disordered swallowing
weakness of palatal elevators (CN10) or superior pharyngeal constrictors leads to?
nasal reflux
weakness of pharyngeal and laryngeal muscles or numbness of pharynx leads to?
aspiration
complications of disordered swallowing?
aspiration pneumonia, poor nutrition, airway obstruction (low risk)
3 oz water swallow test is abnormal if ______ within 1 minute or ________ voice
coughing, wet-hoarse
stroke sites with higher risk of dysphagia?
bilateral brainstem, unilateral brainstem, or bilateral hemispheric
abnormal gag, cough, dysarthria, drowsiness, language problems, gaze paresis, and facial weakness are signs associated with a higher risk of?
dysphagia
nasal reflux and laryngeal penetration (aspiration) worse with solids or liquids?
liquids
difficulty in clearing pharynx worse with solids or liquids?
solids
