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12 Cards in this Set
- Front
- Back
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What are the boundaries of the oral vestibule and Oral cavity proper?
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Vestibule - Space inbetween lips, cheeks and the lateral and anterior dental arches.
OCP - Roof - Palate -Floor - Tongue -Edges - Medial and posterior dental arches |
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What are the functions of the oral cavity?
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1. Oral competence - No drowling
2. Mastication and digestion 3. Speech 4. Immune surviellance |
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Which anatomical land mark defines the root (1/3) and body (2/3) of the tongue?
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The dorsal V-shaped groove - Suclus terminalis
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The posterior 1/3 (root) of the tongue is cobled in appearance - What causes this cobling?
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Lymphoid tissue - No lingeal papillae
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Which nerve controls all the intrinsic muscles of the tongue?
Clinical: Jaw fracture can damage this nerve, what will happen to the tongue? |
Hypoglossal (CN XII)
Paralysis - Hypotrophy of the affected side |
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Taste buds have a special nerve supply, what is it and stimulation of these results in which glands to secrete?
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Facial Nerve - CN VII - Chorda Tympani
Result in the sublingual and submandibullar glands secreting |
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Which sensory nerves are responsible for the gag reflex, where do they innervate and stimulation result in which glands secretion?
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Vagus and the Glossopharyngeal (CN IX) - Posterior 1/3
Paratotid |
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Why might haematemesis be indicative of portal hypertension?
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PHT leads to veinous drainage in the oesophageal vein to be impaired, leading the varices which may rupture and bleed leading to haematemesis
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What may cause the oesophagus to deviate?
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Mitral valve stenosis - L.atrium hypertrophy
Changes in the lung especially at the point the l.bronchus crosses over |
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Which cells determine salivary volume and salivary composition?
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Volume - Acinar cells
Composition - excretory duct cells and striated cells |
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Which ANS systems control salivary output and how can drugs affect this?
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SNS - Reduces blood flow to the gland and lead to dry mouth
PNS - Act on acinar cells to form primary secretion and duct cells to secrete more HCO3 (alkaline) Muscarinic antagonists (atropine) lead to dry mouth |
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What are the 3 phases of swollowing and there saliant features?
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Voluntary phase - Tongue force food bolus into the back of the oropharynx
Pharyngeal phase - Pressure receptors detect food and signal swallowing centers which inhibit respiration, close the glottis and relax the Cricopharygeus, trigger peristalsis Oesophageal Phase - Rapid peristaltic waves leading to rapid transit ~9secs |
