Dissection 11 Flashcards
The Temporalis muscle does what?
Vertical fibers elevate the mandible
Horizontal fibers retract he jaw
It also allows for side to side motion
The masseter muscle causes what movement?
Elevates the mandible, and causes protraction
The Lateral Pterygoid causes what movement?
Only one that depresses the mandible. Also cause protraction and side to side movement
The Medial Pterygoid causes what movement?
Elevation, Protraction, and side to side movement
What pharyngeal arch do the muscles of mastication derive from?
1
Where does the Mandibular Division of CN V (V3) exit?
Foramen ovale
What is the only division of the trigeminal nerve that has branchiomotor fibers?
V3
Where does the meningeal nerve enter the skull?
The foramen spinosum
The auriculotemporal nerve provides sensory to what?
The TMH, parotid gland, and the skin of the anterior ear and temporal region
The Buccal nerve provides sensory to what?
The cheek and the mucous membrane on the inside wall of the cheek
The lingual nerve provides sensory to what?
The anterior 2/3 of the tongue
The inferior alveolar provides sensory to what?
The mandibular teeth
What is the only horizontal nerve in the infratemporal fossa?
Auriculotemporal
What nerves do the parasympathetic fibers arise from?
CN III, VII, and IX
Describe the path of the preganglionic parasympathetic to the parotid gland.
Through the middle ear to form the lesser petrosal nerve and exits the skull through the foramen ovale and synapses in the otic gland
Describe the path of the postganglionic parasympathetics to the parotid gland.
They join the auriculotemporal brach of V3
The chorda tympani is a branch of what nerve?
Facial nerve
Where does the chordi tympani exit in the skull?
The Petrotympanic fissure
What does the maxillary artery supply?
structures in the infratemporal fossa, the pterygopalatine fossa, and the nasal cavity
Where does the maxillary artery enter the skull?
The pterygomaxillary fissure
What are the attachment points of the temporalis?
temporal fossa and coronoid process
What are the attachments of the massester?
The zygomatic arch to the ramus of the angle of the mandible
What are the attachment of the medial pterygoid muscle?
The medial side of the lateral pterygoid plate to the angle of the mandible
What are the attachments of the lateral pterygoid muscle?
The lateral surface of the lateral pterygoid plate to the articular disk of the TMJ and the neck of the mandible
Where does the meningeal nerve enter and exit the skull?
Foramen ovale; foramen spinosum
What does the nerve of the mylohyoid innervate?
Mylohyoid and the anterior belly of the digastric
Where does the lessor petrosal nerve exit the middle ear?
Foramen ovale
What does the preganglionic fibers of the lesser petrosal nerve synapse in?
otic ganglion
What does the chorda tympani carry?
Special viscerosensory fibers (anterior 2/3) and the preganglionic parasympathetic to the sub glands
The special viscerosensory fibers of the chorda tympani synapse in ____.
The geniculate ganglion
The preganglionic parasympathetics of the chorda tympani syanpse in _______.
The submandibular ganglion
Where does the maxillary artery enter the skull?
the pterygomaxillary fissure
Describe the tympanic nerve
It is a parasympathetic nerve of CN IX that forms the tympanic plexus of the middle ear
Within the carotid sheath, which vessel is most posterior
Vagus N
What does the external branch superior laryngeal nerve carry?
branchiomotor to the cricothyroid muscle
What does the internal branch of the internal laryngeal nerve carry
General Somatosensory from epiglottis to vocal cords
What does the right recurrent laryngeal loop around?
The R subclavian artery
What does the left recurrent laryngeal loop around?
The L subclavian artery
What does the R laryngeal nerve carry?
Branchiomotor to all intrinsic muscles of larynx (except cricothyroid)
General somatosensory from larynx inferior to vocal folds
The cervical superior chain is ______ to the carotid sheath
Posterior
The internal carotid plexus contains ___?
vessels of the brain and to the dilator pupillae and superior tarsal muscles
The external carotid plexus contains ______
vessels and sweat glands of the face
Where do the superior and inferior thyroid arteries come off of?
Superior–> external carotid
Inferior–> Thyrocervical trunk
