Cranial nerves Flashcards
Lip seal
7
Buccinator press
12
Glossopalatal seal
10 + 12
Drop push of tongue (oral transit)
12
Swallow initiation
5, 9, 10
Velopharyngeal seal
10, 5
Epiglottic deflection
5, 7, 12
BOT to PPW (posterior pharyngeal wall) approximation
12, 10
Airway protection
5, 7, 10, 12
Glottal closure
10
UES opening
5, 7, 10, 12
Trigeminal nerve
5
Largest cranial nerve
Motor: innervates muscles of mastication to help chew, clench teeth
Sensory: gives information about the size, hardness and temperature of bolus for chewing and swallowing
Muscles of mastication
Masseter, temporalis, medial and laterl pterygoids
Muscles of hyolaryngeal excursion (controlled by the trigeminal)
Mylohoid, anterior belly of digastric
Muscles to tense soft palate and assists with velopharyngeal seal
Tensor veli palatini (prevents nasal regurgitation
Facial nerve
7
Motor: innervates muscles for facial expression, hyolaryngeal excursion and 2 salivary glands
Sensory: the sensation of taste (anterior 2/3 of tongue)
Muscles of hyolaryngeal excursion (controlled by the facial nerve)
stylohyoid, posterior belly of digastric
Muscles of facial expression
Obicularis oris, buccinator
Glands innervated by the facial nerve
Submandibular, sublingual
Glossopharyngeal nerve
9
Motor: provide movement to the stylopharyngeus (shortes and widens the throat)
Sensory: info from the throat, tonsils, middle ear, back of tongue, taste of posterior 1/3 tongue, gag reflex
What does the stylopharyngeus do?
raises the pharynx, compresses the lateral laryngeal walls and helps pharyngeal compression over the food bolus during swallow
Pharyngeal plexus
network of nerves that innervate the pharyngeal contractors
Vagus nerve
10
motor: provides movement to the throat and soft palate (elevates the soft palate), pharyngeal constrictors, UES relaxation, peristaltic wave
sensory: provides general sensation of the epiglottis, pharynx, valleculae, pyriform sinuses, larynx/vocal folds,
swallow initiation, detecting pharyngeal residue, detecting aspiration, taste sensation of the epiglottis
Muscles for velopharyngeal seal
Levator veli palatini
Muscles for glossopalatal seal
Palatoglossus
Accessory nerve
11
Motor: some muscles in the neck, part of pharyngeal plexus, allow a person to rotate, extend and flex neck and shoulders
Hypoglossal nerve
12
motor: the nerve that supplies the tongue muscles,
