normal swallowing Flashcards
phases of normal swallowing
anticipatory phase
oral preparatory phase
oral phase
pharyngeal phase
oesophageal phase
anticipatory phase
opening of mouth before putting food in the mouth
food is checked (look, smell, temperature) and recognised
oral preparatory phase
optimal positioning of bolus
mastication of food to appropriate consistency
requires saliva, nasal airway, cognition
what are the 3 saliva glands
submandibular, sublingual and parotid
what salivary glands secrete at C7
submandibular and sublingual
innervated by cranial nerves 7 & 9
what salivary glands secrete at C9
parotid gland
innervated by cranial nerves 7 & 9
types and percentage of saliva produces by submandibular
serous and mucoid
70% saliva
types and percentage of saliva produced by parotid
serous only
25% saliva
types and percentage of saliva produced by sublingual
serous and mucoid
5% saliva
functions of saliva
protects teeth and gums
promotes oral hygiene
lubricates food
destroys micro-organisms
oral phase
clears bolus from oral cavity and stimulates initiation of pharyngeal swallow
0.3- 1 sec approx
tipper swallow
begins with tongue tip pressed against upper incisors and alveolar ridge
dipper swallow
at onset bolus is beneath anterior tongue and tongue tip scoops the bolus. common with ageing
pharyngeal phase
transport bolus through pharynx with nasal and laryngeal airways protected
how are the airways protected during swallowing
epiglottal descent
laryngeal ascent
adduction of vocal cords
arytenoids to base of epiglottis
