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25 Cards in this Set
- Front
- Back
The oral cavity roof is formed by the ____________
floor by the ___________ lateral walls (cheeks) by the _________ |
hard & soft palate
mylohyoid, geniohyoid, & tongue buccinator muscle |
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The upper dentition is innervated by what?
attached to what bone |
anterior, middle, & posterior superior alveolar nerves (V2)
maxillae |
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The lower dentition is innervated by what?
attached to what bone? |
inferior alveolar nerve (V3)
mandible |
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The buccinator muscle forms the cheek & serves what function during chewing?
What innervates it? What pierces this muscle? |
holds cheeks against alveolar arches & keeps food btwn teeth during chewing
buccal branch of facial nerve (sensory via long buccal n. from mandibular (V3) pierced by parotid duct (which ends near 2nd maxillary molar) |
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What is the function of the mylohyoid & geniohyoid muscles?
what innervates each muscle? |
both depress mandible when hyoid is fixed & elevate & pull hyoid forward when mandible is fixed
mylohyoid- nerve to mylohyoid (inf. alveolar, V3) geniohyoid- C1 (via hypoglossal n) |
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What vein lies superficially on each side of lingual frenulum (under tongue)?
Why is this clinically important? |
deep lingual vein
allows for rapid drug absorption under tongue |
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what 2 salivary glands are in the floor of the oral cavity?
where do they receive parasympathetic (GVE) fibers from? |
submandibular & sublingual glands
from chorda tympani (facial N) via submandibular ganglion |
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What are the 2 parts of the tongue?
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ant 2/3 = oral part or body
(apex sits directly behind incisors, covered w/ papilla w/ taste buds (except filiform papilae)) post 1/3= pharyngeal part or root (attached to mandible & hyoid bone, covered w/ lingual tonsil) |
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What separated the oral & pharyngeal parts of the tongue?
What is the foramen cecum? |
terminal sulcus
depression in apex of terminal sulcus, marks site of embryonic thyroid development |
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What do the intrinsic tongue muscles do?
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change shape of tongue
(originate & insert w/i tongue) |
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What do the extrinsic tongue muscles do?
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protrude, retract, depress, & elevate tongue (alter position)
(originate outside tongue & insert w/i tongue) |
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4 extrinsic tongue muscles
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genioglossus -- depress & protrude
hypoglossus -- depress styloglossus --elevate & retract palatoglossus -all inervated by hypoglossal n EXCEPT palatoglossus, innervated by vagus n |
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What nerve supplies sensory (GSA) to the mucosa of the anterior 2/3 of the tongue & taste (SVA) from the ant of the tongue via Chorda tympani (facial n)?
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Lingual nerve (V3)
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What nerve supplies sensory (GSA) & taste (SVA) from the posterior 1/3 of tongue?
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glossopharyngeal nerve
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What nerve supplies sensory (GVA) & taste (SVA) from a small area next to the epiglottis (extreme root of tongue) via branches from the inernal laryngeal nerve?
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Vagus nerve
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What nerve supplies GSE (motor) to the tongue?
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hypoglossal nerve
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-Parasympathetic ganglion “suspended from” lingual nerve
-Preganglionic fibers from chorda tympani arrive via lingual nerve -Postganglionic fibers continue on to innervate the submandibular and sublingual salivary glands What ganglion? |
submandibular ganglion
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Blood supply to the tongue
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*lingual artery
branches: -dorsal lingual -deep lingual -sublingual |
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Venous drainage of tongue
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dorsal lingual vein
deep lingual vein sublingual vein (same as arterial branches) |
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The hard palate separates the oral & nasal cavity. What is the hard palate formed by?
innervated by? blood supply? |
palatine processes of maxillae & horizontal plate of palatine bones
greater & lesser palatine & nasopalatine nerves (V2) greater & lesser palatine arteries (from |
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5 muscles on each side contribute to formation & movement of the soft palate. What are they?
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tensor veli palatini-- tenses palate, opens tube
levator veli palatini-- elevates palate palatoglossus-- depresses palate, elevates tongue palatopharyngeus-- depress palate, elevates pharynx musculus uvulae-- elevates & retracts uvula |
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ALL of the muscles of the soft palate are innervated by the pharyngeal branch of the vagus nerve via the pharyngeal plexus
EXCEPT _________ |
tensor veli palatini
-innervated by nerve to medial pterygoid (V3) |
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The _____________& ____________ muscles moves the palatopharyngeal arch toward the midline
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palatopharyngeus & palatoglossus muscles
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3 stages of swallowing
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stage 1: muscles of tongue & soft palate compross bolus against palate & push it from mouth into oropharynx
stage 2: soft palate elevates & seals off nasopharynx, larynx elevates & pulls forward, widening & shortening oropharynx stage 3: sequential contraction of 3 pharyngeal constrictor muscles forces bolus into esophagus |
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What is the ONLY voluntary stage of swallowing?
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stage 1
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