11/9 Anatomy Flashcards
describe the cutanious innervation of the face:
it is from the trigeminal nerve.
what patch of skin is innervated by the CN V-1?
the nose, eyes, and forehead up over the top of the scalp
what patch of skin is innervated by V-2
the maxillar nerve goes the upper lip, the lower nose, and up the cheek to above the ears.
what does the V-3 innervate in the skin?
the mandibular banch it innervates the bootom lip, the chin and the temple.
the muscles of facial expression:
“F.O.N.Z. B.O.P” as in the fonz likes his beat bops…:-) they are: frontalis, orbicularis oculi, nasalis, zygomaticus, bucinator, orbicularis oris, platysma.
what muscles will wrinkle the forhead?
the frontalis
what muscle closes eye?
the orbicularis oculi
what muscle flare the nostrils?
the nasalis
what muscle will smile the mouth
zygomaticaus
what muscle will tensse the cheeks
buccinator
the muscle that will close the mouth or pucker the lips
orbicularis oris
wat muscle will tense the skin of the neck
the platysma
waht is the origin of the superficial muscles of the face?
the 2nd branchial arch!
what is the gland that is located just on top of the masitrer muscle
the parotid gland!
coursed thorugh the front of the parotid gland and peirces the buccinator muscle, and comes into the d2nd maxillary molar…
the parotid gland
that nerve goes just under the parotid gland
the CN VII buccularis branch
what is the function of the parotid gland?
makes saliva to giv amerase and make a bolus of chewed up food
what innervates the parotid gland
not the CN VII like the other glands but CN IX ! or the glossopharyngeal nerve!
Mkes you cry taste pie, close your eye and innervates all the glands of the head except the one it goes through…
CNVII
Decribe the corse of the innervation of the parotid gland
it is innervated by CNIX that originates in the medulla then comes and hitch hikes along the CNV-3 to the gangleon calle dthe otic ganglion then down to the parotid gland via V-3 hitch hiking!
what innervates the mucsles of facial expression?
CN VII – facial nerve proper!
what is the corse of the BM of the facial nerve
from the pons through the internal acoustic meatus, and then the facial nerve goes down and exits the styloid mastoid foramen, then it gives rise to five branches to innervate the muscles
what are the five branches of the facial nerve that innervate the facial expresion muscles
top to bottom: Temporal, zygomatic, buccal, mandibular, cervical branches.
what is the way to remember the nerves of the facial nerve that innerate the muscles of facial expression.
To Zanzibar By Motor Car
The facial nerve does….
closes the eye, tastes pie, makes you cry, and innervates all the glands of the head except the one it goes through!
waht are the borders of the infratemporal fossa?
it is on the bottom of the skull, deep to the zygomatic arch, post to maxilla; ant. to masotid process, and lateral to the pterygoid plate
what are the contents of the infratemporal fossa?
the foramen ovale with the CN V-3; foramen spinosum with the middle memingeal artery. the Infraorbital fissure with the CN V-2. the petrotympanic fisure with the chorda tympani nerve; the mandibular fossa for the mandibular joint.
what is the temporomandibular joint
the joint of the jaw
what is the temporomandibular joint made of?
the Mandibular fossa above the articular disc that is above the mandibualr condyle that is surrounded by the joint capsule.
what are the muscle of mastication?
Masseter muscle; Temporalis muscle; medial pterygoid muscle; lateral pterygoid muscle
the masseter muscle location
arisees from the zygomatic arch, goes to the ramus of the mandible
function of the masseter muscle
elivate the mandible with power
innervation of the masseter muscle
V-3
The temporalis muscle
arises from the temporal fossaa to the choronoid process of the mandible and goes under the zygomatic arch.
function of the temporalis muscle
to close the jaw with power
innervation of the temporalis muscle
CN V-3
course of the medial pterygoid muscle
from the ramus of the mandible to the pterygooid plate
function of the medial pterygoid muscle
side to side chewing
innervation of the lateral pterygoid muscles
V-3
attachment of the lateral pterygoid muscle
from the condiloid process of the mandible to the pterygoid plate
function of the lateral pterygoid muscle
depress the mandible and move it forward
innervation of the lateral pterygoid muscle
V-3
what is between the mandibular fossa and the mandibular condyle?
the articular disc
what does the lateral pterygoid muscle do as it contracts?
it pulls the mandibular condyle forward and the articular disc forward to really open the mouth wide!
what does the mancible and associated muscles derive from?
the 1st branchial arch and therefore all innervated by V-3
what are the nerves of the infratemporal fassa?
The CN V-3 that gives rise to the inferior alveolar nerve, the mental nerve, and the lingual nerve
Describe the course of the V-3 and what nerves it gives rise to?
through the foramen ovale in the infra tempral fossa, then give rise to lingual nerve on the inside of the mandible and the inferior alveolar nerve that courses down the mandible to innervate the molars and then exit the mandible to give rise to the mental nerve!
what CNs give rise to the Lngual nerve?
V-3 and VII gives the chorda timpani nerve
what does the Chorda tympani nerve that comes from CN VII innervate?
it innervates the SS: tounge taste; VM: sublingual salivary gland; and VM: submandibular gland.
what the what how do we have both the CN VII chorda tympani nerve and the CN V-3 together at the lingual nerve just below the infra temproal fossa
the chorda tympani nerve jumps on the CN V-3 to get to the tounge!
CN VII
tastes pie makes you cry closes your eye, and inneravtes all the glands but the one it goes through
