0505 - Pharynx - AF Flashcards
What are the stabilising features of the temporo-mandibular joint? Devise a table showing attachments, innervations and actions of the related muscles.
The TMJ is stabilised by:- joint capsule (with intracapsular ligaments)- post-glenoid tubercle- the spheno-mandibular ligament, by limiting gliding of the mandible- the stylo-mandibular ligament
What are the boundaries and surface features of the naso-, oro- and laryngopharynx? What is the sensory innervation of these regions?
Compare the sensory innervation of the naso-, oro- and laryngopharynx regions with the nasal cavity, oral cavity and the larynx.
Nasopharynx V2Oropharynx IX (via plexus)Laryngopharynx XNasal cavity General: V1, V2; Smell: IOral cavity General: V1, V2; Taste: VII, IXLarynx X
Which ligamentous structures support the pharynx?
pharyngeobasilar fascia - forms uppermost wall of pharynx and has a line of attachment to the base of the skullpharyngeal raphe - midline posteriorly; attached to pharyngeal tubercle on basal occipital boneauditory tube - on line of attachment of pharyngeobasilar fascia
Describe the arrangement of the circular and longitudinal muscle fibres that form the pharyngeal walls.
Diagrammatically represent the muscles of the palate, and their actions.
Devise a table showing attachments, actions and innervations of the palatine muscles.
Briefly describe the process of deglutition.
- Mouth - voluntaryi. Tongue pushes bolus backwardsii. Back of tongue elevatediii. Soft palate contracts/elevatesiv. Palatopharyngeal sphincter pulls post-pharyngeal wall forwards2. Pharynx - reflexi. Hyoid bond and larynx elevated by suprahyoidsii. Epiglottis depressed to close larynx inletiii. Bolus into laryngopharynxiv. Laryngopharynx elevated (longitudinal, suprahyoid and infrahyoid muscles)v. Bolus enters oesophagus as circular fibres relax3. Oesophagusi. Bolus propelled downwards by oesophageal musclesii. Gastro-oesophageal sphincter relaxes
