Dysphagia Flashcards
(150 cards)
What kind of reflex is swallowing? When do humans develop it?
Primitive Reflex:
• Human fetus can swallow at 12 weeks gestation; before CNS has completely developed
What are the functions of swallowing?
Serves 2 Functions:
- Nutrition
- Protects from aspiration
What components do we swallow?
Saliva
Food
Fluids
What are the components of saliva?
water, electrolytes and proteins
What are the functions of saliva?
1-2L produced each day • Moistens food • Digestion • Antibacterial protection • Enhances taste • Oral hygiene
WHat are the locations of muscles involved in swallowing?
25 muscles involved: mouth, pharynx, larynx, esophagus
Swallowing & breathing co-ordinated by __ nerves
Swallowing & breathing co-ordinated by cranial nerves
What are the 5 cranial nerves?
V: Trigeminal VII: Facial Nerve IX: Glossopharyngeal X: Vagus XII: Hypoglossal
Describe V: Trigeminal nerve
Oral preparatory and oral transit phases
• Motor: mastication
• Sensory: taste and touch
Describe VII: Facial Nerve function in taste
Taste on anterior 2/3 of tongue
Describe IX: Glossopharyngeal nerve
Pharyngeal & esophageal phases
• Motor: swallowing, gag reflex
• Sensory: palatal, glossal & oral sensations
Describe X: Vagus nerve
Pharyngeal and esophageal phases
• Motor: GI activity
• Sensory: Cough reflex, taste on posterior 2/3 of tongue
Describe XII: Hypoglossal nerve
All phases
• Motor: Tongue movement
What are the 4 phases of swallowing?
- Oral preparatory phase
- Ora ltransit phase
- Pharyngeal phase
- Esophageal phase
Which swallowing phase is the initial phase?
oral preparatory phase
What type of control is oral preparatory phase under?
voluntary
What are the nerves involved in oral preparatory phase?
CN: V, VII, XII
• Trigeminal, facial & hypoglossal
What happens in the oral preparatory phase?
- Food & drink enter mouth
- Saliva secreted
- Lips seal mouth
- Soft palate drop to base of the tongue
* Protects the airways from food spillage - Tongue moves food around the mouth, mixes with saliva
- Mastication, physical breakdown of food
- Bolus formed and between tongue and soft palate
When/why is saliva secreted?
- Response to food entering mouth
* Visual response to food “mouth waters”
What are the consideration for oral preparatory phase?
- Sight
- Ability to self feed
- Hand mouth coordination
- Lip seal
- Tongue control / strength
- Oral sensation
- Dentition / chewing difficulty
- Cognition
- Positioning
What type of control is oral transit phase under?
voluntary
What are the nerves involved in oral transit phase?
CN: V, VII, XII
• Trigeminal, facial & hypoglossal
What happens in the oral transit phase?
Soft palate raises to seal nasal cavity from oropharynx
• Important for pressure to help propel bolus to pharynx
• Prepared bolus propelled to the oropharynx
• Anterior and lateral edges of tongue are raised and contact alveolar ridge
• Blade of tongue is pressed against hard palate and moves in a wave like motion (front to back)
• Posterior tongue is depressed and velum is elevated propelling bolus into oropharynx
Considerations: Oral Transit Phase
- Foods that don’t form cohesive bolus, might get stuck (• Honey, peanut butter; • Saltine crackers)
- Pocketing
- Tongue strength
- Oral hygiene
- Oral sensation
- Energy level of individual