Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Neuro > Infratemporal Fossa and TMJ > Flashcards

Infratemporal Fossa and TMJ Flashcards

1
Q

What are the boundaries of the infra temporal fossa

A 
Lateral = ramus of mandible 
Anterior = maxilla 
Medial = lateral pterygoid plate (part of sphenoid bone) 
Roof = Sphenoid (greater wing) 
Posterior = Tympanic plate, mastoid and styloid process (part of temporal bone) 
Inferior = angle of mandible
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Lateral and medial pterygoid plates (sphenoid bone) make up two holes

A

Foramen Ovale - V3

Foramen Spinosum - Middle Meningeal A. coming off the Maxillary A.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Inferior alveolar N. (V3) - comes out of the _____ and goes through ____ to terminate as the ____.

The inferior alveolar N. goes to the ___ and innervates ___.

The ____ comes off the inferior alveolar n. and rides along the ____.

A

Mandibular foramina
Mental foramina
Mental N.

The inferior alveolar n. goes to the JAW and innervates TEETH

Nerve to mylohyoid that runs along the groove for the nerve of mylohyoid that is on the back of the mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

On the sphenoid bone, there is the pteryogoid palatine fossa what is present there?

A

Pterygoid palatine ganglion - this is where pre-ganglionic parasympathetic fibers from the greater petrosal nerve off the facial nerve will enter to innervate the lacrimal gland, nasal mucosa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the sella tursica?

A

Part of the sphenoid bone - depression which holds the pituitary gland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the contents of the infra temporal fossa?

A
  1. Inferior portion of the temporals m.
  2. Lateral and medial pterygoid muscles
  3. Maxillary A.
  4. Pterygoid venous plexus
  5. Nervous Structures:
    - Inferior alveolar n. V3
    - Lingual n. V3
    - Chorda tympani CN VII
    - Otic ganglion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When you are not moving for a long time and the blood becomes static you YAWN - what muscle contracts to help you yawn? - What is the purpose of this?

A

Lateral pterygoid muscle

- pterygoid plexus helps to increase venous return

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Accessory Meningeal A. enters the cranium via the

A

Foramen Ovale - supplies the extracranial muscles of the infratemporal fossa, otic ganglion and the sphenoid bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Middle Meningeal A. enters the cranium via the

A

Foramen spinosum and supplies the dura mater of the lateral wall, trigeminal ganglion, facial nerve, geniculate ganglion, tympanic cavity and tensor tympani muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the arteries for the muscles of mastication?

A

Pterygoid part of maxillary A. –> all from the second part of the maxillary A.

  1. Deep Temporal A –> Temporalis M.
  2. Pterygoid A –> Pterygoid M.
  3. Massteric A. –> Supplies TMJ and Masseter M
  4. Buccal A. –> Supplies buccal fat-pad, buccinator and buccal oral mucosa
    runs with the buccal N. (comes of V)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

V3 (mandibular) sensory branches

A
  1. Meningeal
  2. Auriculotemporal
  3. Lingal
  4. Inferior alveolar N.
  5. Meningeal N.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

V3 (mandibular) motor branches - These supply the muscles of mastication

A

Massteric N.
Medial Pterygoid N.
Lateral Pterygoid N.
Nerve to Mylohyoid coming off the inferior alveolar N. (nerve to the mylohyoid m. and the anterior belly of the digastric m)

Deep Temporal N. - anterior and posterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the muscles of mastication?

A 
Muscles of mastication include
the temporalis, masseter, medial
pterygoid and lateral pterygoid. The
actions of these muscles are assisted by
the buccinator muscle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the sphenomandibular ligament?

A

The sphenomandibular ligament is a thickened band of pterygoid fascia between the sphenoidal spine and the lingula of the mandible. The maxillary artery, vein and auriculotemporal nerve pass between this ligament and the neck of the mandible.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What depresses the mandible?

A

Depression means OPEN the mandible

Lateral ptyergoid, suprahyoid muscles and infrahyoid muscles

  1. Digastric Muscle
  2. Mylohyoid Muscle
  3. Geniohyoid M.
  4. Stylohyoid M.
  5. Sternohyoid - Ansa Cervicalis
  6. Sternothyroid - Ansa Cervicalis
  7. Thyrohyoid - ventral rams C1
  8. Omohyoid - Ansa Cervicalis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The mylohyoid m is innervated by

A

Nerve to Mylohyoid - Branch off the Inferior Alveolar N (V3)

17
Q

The stylohyoid M. is innervated by

A

The facial nerve CN VII

18
Q

The geniohyoid M. is innervated by

A

Ventral ramus of C1

19
Q

The anterior belly of the digastric muscle is innervated by

A

Nerve to mylohyoid - Branch off the Inferior Alveolar N (V3)

20
Q

The posterior belly of the digastric muscle is innervated by

A

facial nerve CN VII

21
Q

What elevates the mandible?

A

CLOSES the mandible

Temporalis M, Masseter M., Medial pterygoid muscle

22
Q

What innervates the Thyrohyoid muscle?

A

Ventral rams of C1 - same with geniohyoid

23
Q

What muscles are involved in jaw protrusion?

A

Medial pterygoid, lateral ptyergoid and masseter muscle

24
Q

What muscles are involved in jaw recursion?

A

Temporalis M and Masseter M.

25
Q

What muscle is involved in jaw protrusion and jaw retrusion?

A

Masseter M

26
Q

Lateral movements of the jaw? CHEWING

A

Ipsilateral temporalis M. and masseter M and contralateral pterygoids muscles - CHEWING

27
Q

What ligament prevents the mandible/ jaw from dislocating?

A

Stylomandibular Ligament

28
Q

The Stylomandibular ligament runs from the

A

Styloid process (temporal bone) to the inner surface of the angle of the mandible

29
Q

What two ligaments limit the inferior excursion of the TMJ? - Opening the mouth

A

The sphenomandibular ligament (sphenoid bone to the lingula of the mandible) and the stylomandibular ligament

30
Q

Fracture of the neck of the mandible - what vessels are affected?

A

The maxillary vein, artery and auriculotemporal nerve

  • these vessels travel in the sphenomandibular ligament
31
Q

Fracture of the ramus of the mandible - what vessels are affected?

A

may damage the lingual or inferior alveolar nerves

32
Q

Fracture of the body of the mandible?

A

Inferior alveolar N. and artery, vein

33
Q

TMJ - what is the osteology?

A

Articular (glenoid) fossa, articular tubercle, articular disk, Head of the mandible

Deep to the masseter muscle is the temporomandibular joint capsule

34
Q

What is muscle that is continuous with the articular disk of the TMJ?

A

The lateral pterygoid muscle

35
Q

TMJ during gape >15 degrees

A

Dislocation of the head of the mandible/ mandibular condyle

when you open your mouth the lateral ptyergoid contracts and pulls the articular disk. The articular disk will drop on the articular tubercle

Neuro (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions