Salivation And Swallowing Flashcards
What are the functions of saliva?
Lubrication
Begin digestion
Aid swallowing
Dissolve molecules to allow for taste
What is xerostomia?
What is halitosis?
Dry mouth
Bad breath
Which system is primarily in control of the secretion of saliva
Parasympathetic nervous system
What happens in the oral preparatory phase?
Voluntary phase
Bonus pushed towards pharyngeal wall
What happens during the pharyngeal phase?
Involuntary
Soft palate seals of nasopharynx and larynx elevates, closing epiglottis.
Vocal cords adduct to cover trachea
Upper oesophageal sphincter opens
What happens during the oesophageal phase?
Upper oesophageal sphincter closes
Peristalsis carries boils down into oesophagus
Why can babies breathe while feeding?
What does this prevent?
Epiglottis extends into nasopharynx, allowing for a patent airway through the nose.
Speaking cannot occur while this is in place
Which nerves control the gag reflex and swallowing?
Glossopharyngeal nerve (IX) Vagus nerve (X)
What important action should be taken in stroke victims
NBM until assessed by SAL - high risk of choking or aspiration pneumonia
What type of tissue lines the oesophagus as you move cranially to caudally?
Skeletal muscle - smooth muscle
Where is the oesophagus narrowest?
Junction to pharynx (crichopharyngeus)
Where the arch of aorta crosses
Where compressed by the left main bronchus
At the oesophageal hiatus
How is gastro-oesophageal reflux prevented?
Diaphragm compresses intraabdominal oesophagus when pressure rises, coupled with steep angle of entry.
