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infratemporal temporal TMJ UAB
netter's notes questions
56
Anatomy
Professional
03/17/2010

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Cards

Term
What are the boundaries of the temporal fossa?
Definition
  1. Superior = superior temporal line
  2. Inferior = zygomatic arch
  3. Floor = greater wing of sphenoid, frontal, squamous temporal, parietal
Term
What is the pterion?
Definition
Junction of the frontal, greater wing of the sphenoid, squamous part of temporal, and parietal
Term
What are the contents of the temporal fossa?
Definition
Temporalis muscle, its nerve and blood supply
Term
What separates the temporal fossa from the infratemporal fossa?
Definition
Infratemporal crest of the greater wing of the sphenoid
Term
What are the boundaries of the infratemporal fossa?
Definition
  • Medial: lateral pterygoid plate
  • anterior: infratemporal part of the maxilla
  • posterior: styloid process of temporal along with the anterior surface of the condylar process of the mandible
  • lateral: ramus of the mandible
Term
What area is located posterosuperior to the third maxillary molar and serves for part of the origin of the medial pterygoid muscle?
Definition
maxillary tuberosity
Term
What is the communication between the infratemporal fossa and the pterygopalatine fossa?
Definition
pterygomaxillary fissure
Term
What communication does the maxillary artery use to transmit from the infratemporal fossa to the pterygopalatine fossa?
Definition
Maxillary artery
Term
What opening connects the infraorbital fossa with the orbit?
Definition
inferior orbital fissure
Term
What makes up the roof of the infratemporal fossa?
Definition
Greater wing of the sphenoid
Term
What are the two foramina in the greater wing of the sphenoid and what do they allow passage of?
Definition
  1. Foramen ovale = V3 and the lesser petrosal nerve
  2. Foramen spinosum = middle meningeal artery to the middle cranial fossa
Term
What is the tiny bone structure next to the foramen spinosum that serves as a ligament attachement
Definition
Spine of the sphenoid
Term
What CN branch is the chorda tympani and what fissure does it pass through to get to the infratemporal fossa from the middle ear?
Definition
Petrotympanic fissure
Term
What two processes does the ramus of the mandible end in?
Definition
  • The coronoid process and condylar process
Term

what is the depression on the anterior surface of the neck for insertion of the lateral pterygoid muscle?

 

Definition
pterygoid fovea
Term
What separates the condylar and coronoid processes of the mandible? What does it transmit?
Definition
  • mandibular notch = masseteric nerve and vessels to the masseter muscle
Term
Where is the mandibular formina and what does it transmit?
Definition
  • On the medial surface of the ramus
  • inferior alveolar nerve and vessels that give off the nerve and vessels to the mylohyoid in the mylohyoid groove
Term
What bony process guards the mandibular foramen?
Definition
Lingula
Term
Why is the medial surface of the angle of the mandible roughened?
Definition
For the insertion of the medial pterygoid muscle
Term
How many muscles of mastication are there?
Definition
4
Term

Temporalis ms

origin

insertion

fxn

innervation

vessel

Definition
  • origin = bones of the floor of the temporal fosss and the temporalis fascia
  • insertion = coronoid process and anterior border of the ramus of the mandible
  • fxn = anterior fibers elevate the mandible and the posterior fibers retract the mandible
  • innervation = auricotemporal nerve
  • deep temporal artery = maxillary artery branch
Term

masseter

origin

insertion

fxn

innervation

vessel

Definition
  • Has superficial and deep fibers
  • Superficial origin = zygomatic process of maxilla and lower border of the zygomatic arch
  • Deep origin = lower border and medial surface of zygomatic arch
  • insertion = lateral surfaces of the coronoid proces, ramus, and angle of the mandible.
  • deep fxn = elevates
  • superficial = protracts
Term

Lateral ptyergoid upper head

origin

insertion

fxn

innervation

vessel

Definition
  • origin = infratemporal surface of the greater wing of the sphenoid
  • insertion = articular disc and upper part of the neck of the mandible
  • fxn= protraction, depress jaw
Term

lateral pterygoid lower head

origin

insertion

fxn

innervation

vessel

Definition
  • main part
  • origin = lateral surface fo the lateral pterygoid plate
  • insert = pterygoid fovea
  • fxn = protraction and depresssion of mandible
  • innervation = CN5
  • vessels = facial
Term

Medial pterygoid ms (deep head)

origin

insertion

fxn

innervation

vessel

Definition
  • origin = main one = medial surface of the lateral pterygoid plate
  • insertion = medial surface of the angle and ramus of the mandible
  • fxn = elevates and protracts jaw
  • innervation = V3
Term

medial pterygoid ms. (superficial)

origin

insertion

fxn

innervation

vessel

Definition
  • origin = maxillary tuberosity
  • insertion = same as deep
Term
What is the chief nerve of the infratemporal fossa?
Definition
V3
Term
What are the functional components of V3 and what do they supply?
Definition
  • GSA = skin of lips and cheeks, teeth
  • SVE = muscles of masticaiton (PAM1)
Term
Through what foramen does V3 enter the infratemporal fossa?
Definition
Foramen ovale
Term
Is the anterior or posterior divison of V3 mostly motor?
Definition
anterior
Term
What are the branches of the anterior branch of V3?
Definition
  • Anterior and posterior deep temporal nerve to temporalis
  • messeteric nerve
  • nerve to the lateral pterygoid
Term
What is the only sensory branch of the posterior V3 and what does it innervate?
Definition
Buccal n. = skin and mucosa of the cheek
Term
What are the branches of the posterior branch of V3?
Definition
  • Auriculotemporal n. (TMJ, auricle, parotid gland, and temple)
  • Lingual n. (general sensory to the anterior 2/3 tongue and floor of mouth)
  • inferior alveolar n. (snesory to the mandibular teeth and gives rise to mental branch (chin and lower lip))
Term
What is the only motor nerve to branch off posterior V3?
Definition
Nerve to mylohyoid = mylohyoid and anterior belly of digastric
Term
Do the lingual and inferior alveolar nerve go deep or superficial to the medial pterygoid ms?
Definition
superficial
Term
What are the functional components of the chorda tympani?   What do they innervate?
Definition
  1. SVA = taste buds 2/3rds anterior of tongue
  2. GVE = sublingual and submandibular glands
Term
What nerve innervates the tensor (veli) palatini muscle and the tensor tympani muscle?
Definition
Medial pterygoid nerve
Term
What are the responsibilities of the tensor palatini ms and tensor tympani ms respectively?
Definition
  • tenses the soft palate
  • dampens sounds from chewing
Term
What landmark dictates the split of the mylohyoid nerve from the inferior alveolar nerve?
Definition
just superior to the mandibular foramen
Term
What are the three parts of the maxillary artery?
Definition
  1. Mandibular part (passes deep to neck of mandible)
  2. pterygoid part (passes superficial to the lat. pterygoid ms)
  3. pterygopalatine part (passes into pterygopalatine fossa)
Term
What are the mandibular parts of the maxillary artery?
Definition
  1. Inferior alveolar artery (mandibular teeth )
  2. Middle meningeal artery (crainal bones)
Term
What are the branches of teh pterygoid part of the maxillary artery?
Definition
  1. ant/post deep temporal arteries
  2. masseteric a.
  3. med/lateral pterygoid aa,
  4. buccal artery
Term
What is the course of the middle meningeal artery?
Definition
  • passes superiorly between the two roos aof the auriculotemporal nerve into the foramen spinosum
Term
What are the clinically important connections for spread of infection inside the pterygoid plexus?
Definition
  1. Emmissary vein to the cavernous sinus (foramen ovale)
  2. Facial vein via deep facial vein
  3. inferior opthalmic vein via inferiror orbital fissure
Term
What is the TMJ between?
Definition
Head of the mandible (condylar) and the squamous part of the temporal bone
Term
What are the parts of the squamous temporal bone involved in the TMJ?
Definition
  • mandibular fossa
  • articular tubercle
  • postglenoid tubercle
Term
What are the two parts of the mandibular fossa?
Definition
  1. articular part
  2. non articular part (tympanic portion of the temporal bone)
Term
The thickened ligament of the TMJ is the?
Definition
Lateral temperomandibular ligament
Term
Attachments of the lateral TM ligament?
Definition
It is an intrinsic ligament (thickened), attaches to the base of temporal part zygomatic arch and apex of the neck of the mandible
Term
What are the two extrinsic ligaments of the TMJ and there functions?
Definition
  1. Stylomandibular ligament (separates the parotid and submandibular gland)
  2. Sphenomandibular ligament (funnel anesthesia into the mandibular foramen)
Term
What is the nervous and blood supply to the TMJ?
Definition
  1. Auriculotemporal nerve and masseter nerve
  2. maxillary and superficial temporal aa
Term
The inferior an superior cavities of the TMJ are divided by what?
Definition
Articular disc
Term
What is the composition of the articular disc?
Definition
  • avascular fibrous tissue
Term
What type of movement occurs in the inferior compartment?
Definition
Hinge
Term
What type of movement occurs in the superior compartment of the TMJ?
Definition
Gliding and hinge
Term
What helps deter the medial displacement of the condylar head?
Definition
Spine of the spheniod
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