Stomatognathic system Flashcards
functions of stomatognathic system
-mastication
-speech
-swallowing and deglutition
-respiration
-sensory perception
proprioceptors in PDL
-ruffini corpuscles
-pacini corpuscles
structure where temporomandibular dysfunction manifests as clicking
meniscus/articular disc
branch of mandibular nerve that prevents bone to bone gliding
parasympathetic fibers of the otic ganglion
TMJ ligaments (CaSTS)
-capsular
-stylomandibular
-temporomandibular/lateral ligament
-sphenomandibular
maximum opening of the jaw can fit ___ closed fingers
four
muscles of mastication (TIME)
-temporalis
-internal/medial pterygoid
-masseter
-external/lateral pterygoid (only depressor muscle bc of horizontally oriented fibers)
accessory musclees of mastication
-digastric
-mylohyoid
-geniohyooid
-orbicularis oris
-buccinator
swallowing vs deglutition
swallowing - oral phase, voluntary
deglutition - pharyngeal phase, involuntary
occur simultaneously but not the same
infrahyoid muscles (TOSS)
-thyrohyoid
-omohyoid
-sternohyoid
-sternothyroid
depress hyoid and larynx
what is the ‘swallowing center’ and where
nucleus ambiguus
-sends motor information to CN IX, X, XI, XII
-located in medulla oblongata
cranial nerves involved in deglutition
CN IX (glossopharyngeal)
CN X (vagus nerve)
CN XI (palatopharyngeus)
extrinsic muscles of the tongue
-genioglossus (protrude, CN XII)
-hyoglossus (depress, retract, CN XII)
-styloglossus (pull up and back, CN XII
-palatoglossus (pull toward palate, CN X)
intrinsic muscles of tongue
-longitudinalis (shorten tongue)
-transverse (narrow and elongate)
-vertical (flatten and broaden)
cranial nerves involved in function of tongue
CN XII (motor function
CN V3, IX, X (sensory)
CN VII, IX, X (taste)
CN VII - innervate anterior 2/3
CN IX - innervate posterior 1/3
CN X - epiglottis
5 cranial nerves innervate tongue
