7-Temporal Region and Pharynx brainscape Flashcards
Articular disc of the TMJ
divides the joint cavity into upper and lower sections allowing for both hinge joint movement and gliding
Borders of the Infratemporal Fossa
Laterally: ramus of mandible Medial: Lateral pterygoid plate Anteriorly: Posterior aspect of maxilla Posteriorly: Tympanic plate, mastoid & styloid process of temporal bone Superiorly: Inferior surface of greater wing of sphenoid Inferiorly: where pterygoid muscle attaches to the mandible near its angle
Branches of the third part of the maxillary artery
1) Middle meningeal 2) Infraorbital 3) Superior & inferior dental arteries
Contents of the Infratemporal Region
Muscles: lateral & medial pterygoid, part of temporalis Vessels: Maxillary artery, pterygoid venous plexus Nerves: mandibular (V3), inferior alveolar (V3), lingual (V3), Buccal (V3), chorda tympani (CN VII), otic ganglion
Contents of the Pterygopalatine Fossa
*Maxillary artery & beginning of branches *Maxillary nerve associated with the nerve of the pterygoid canal and the pterygopalatine ganglion
Divisions of the Pharynx
Nasopharynx: From choncae of nasal cavities to soft palate Oropharynx: From soft palate to upper marginof epiglottis Laryngopharynx: From superior margin of epiglottis to top of Esophagus at CVI
From what does the middle meningeal artery arise?
Maxillary artery, which is a branch off the external carotid
Innervation of the Laryngopharynx
Motor: Pharyngeal plexus Sensory: CN X via internal laryngeal
Innervation of the Nasopharynx (Motor & Sensory)
Motor: all muscles from pharyngeal plexus, IX, X, and XI except for tensor palatine (V3) Sensory: CN V2 (maxillary), Greater palatine & nasopalatine
Innervation to Oropharynx
Motor: Pharyngeal plexus (mostly vagus) except for the stylopharyngeus (IX) Sensory: CN IX
Isthmus of Fauces
constricted space between oral cavity proper and oropharynx - guarded by palatoglossal and palatopharyngeal folds
Laryngopharynx
Laryngeal inlet guarded by the epiglottis, with piriform recesses located laterally (depressions)
Level of vertebrae at cricoid cartilage
C6 –> esophagus begins here
Ligaments of the TMJ
Sphenomandibular & stylomandibular- support the joint but are a distance from the joint itself
Lymph tissue of the nasopharynx and clinical correlate
Pharyngeal tonsil: enlarged = adenoids