Deglutition correct answers Placing food or liquid in oral cavity
Moving it backward to pharynx
Propelling it into esophagus
Letting it travel down to stomach
Eating and drinking correct answers Require coordination of many structures
Coordination of lips, mandible, tongue, velum, pharynx, l...
SHS 310 Exam 4 || very Flawless.
Deglutition correct answers Placing food or liquid in oral cavity
Moving it backward to pharynx
Propelling it into esophagus
Letting it travel down to stomach
Eating and drinking correct answers Require coordination of many structures
Coordination of lips, mandible, tongue, velum, pharynx, larynx, esophagus, etc.
Active forces correct answers Contraction of muscles of respiration, larynx, pharynx and oral
cavity
Four phases of swallowing correct answers Oral preparatory
Oral transport
Pharyngeal transport
Esophageal transport
Oral preparatory phase for liquids correct answers Liquid placed in oral cavity
Mandible elevates, lips close
Anterior tongue forms cup for bolus
Back of tongue contacts velum
Velopharyngeal port is open
Oral preparatory phase for food correct answers Mastication
Mandible, teeth, lips, tongue, cheek grind and manipulate substance into bolus
Bolus positioned on anterior surface of tongue
Velum contacts tongue
VP port open
3 to 20 seconds
Oral transport phase correct answers Bolus moved back toward pharynx
, Tongue tip elevates and squeezes bolus
Lips, cheeks compress
Velum elevates and pharyngeal walls constrict
Less than 0.5 seconds
Pharyngeal transport phase correct answers Triggered when bolus passes anterior faucial pillars
Under automatic control
0.5 seconds
Velum elevates, pharyngeal walls constrict
Hyoid bone/larynx move upward and forward
Vocal folds close, epiglottis folds over
Tongue propels bolus into pharynx
Pharynx contracts
Bolus divides at pyriform sinuses
Cricopharyngeus relaxes
Esophageal transport phase correct answers Air pressure lowers below the bolus
Peristaltic action of esophagus propels bolus
Breathing and swallowing correct answers Reduce risk of aspiration by closing larynx for brief
period of time during swallow and by swallowing during expiration
Apneic interval lasts about 1 second
Neural control for swallowing correct answers Speech and swallowing are controlled by different
parts of the central nervous system
Speech and swallowing use the same peripheral nervous system (cranial nerves)
Central nervous system control for swallowing correct answers Medulla oblongata
CNS control for swallowing
Voluntary correct answers Cortex participates voluntary phases of swallowing
Primary motor cortex, premotor cortex, primary sensory cortex
CNS control for swallowing
Autonomic correct answers Subcortical structures also involved
Basal ganglia, thalamus, cerebellum
Peripheral innervation for swallowing correct answers Larynx
- V, VII, X, XI, XII
Velopharyngeal port
- V, VII, pharyngeal plexus (IX, X, and XI)
Articulators
- Jaw - V
- Lips, cheeks - VII
- Tongue - XII
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