Face and Mouth Flashcards
Between which bones does the temporomandibular joint occur?
Condyles of the mandible and the temporal bone
What is the name of the process at the front of the mandible?
Coronoid process
What is the name of the process at the front of the mandible?
Coronoid process
What is the mandibular notch?
The space between the condyle and coronoid process of the mandible
What is the angle of the mandible?
Place where body and ramus of mandible are continuous at the angle of the jaw
What is the angle of the mandible?
Place where body and ramus of mandible are continuous at the angle of the jaw
Where is the pterygoid fovea on the mandible?
Inside of mandible in the groove of the condyle
Name the 3 parts of the mandible
Body
Ramus
Alveolar process
Where is the alveolar process on the mandible?
Located underneath the teeth
What is another word for the chin?
Mental protuberance
Name the foramen found in the anterior chin region of the mandible
Mental foramen
Name the line present on the anterior surface of the mandible
Oblique line
Name the line present on the anterior surface of the mandible
Oblique line
Name the foramen found in the posterior are of the angle of the jaw
Mandibular foramen
Name the foramen found in the posterior are of the angle of the jaw
Mandibular foramen
How many muscles of mastication are there?
4
Name the 4 muscles of mastication
Masseter
Temporalis
Medial Pterygoid
Lateral Pterygoid
What is the origin of the masseter?
Undersurface of the zygomatic arch
What is the insertion of the masseter?
Ramus at the anterior angle of the mandible
What innervates masseter?
Mandibular division of trigeminal nerve
What is the action of masseter?
Elevates mandible to occlude teeth
Causes protrusion of the jaw
What is the origin of temporalis?
Temporal lines on side of skull
What is the insertion of temporalis?
Moves underneath the zygomatic arch to attach to the coronoid process
What innervates temporalis?
Mandibular division of the trigeminal nerve
What is the action of temporalis?
Elevates mandible to occlude teeth
Causes retraction of the jaw
What is the origin of the medial pterygoid muscle?
Medial surface of lateral pterygoid plate
What are the lateral and medial pterygoid plates?
Inferior projections of the sphenoid plate (underneath the greater wing of the sphenoid)
What is the insertion of the medial pterygoid muscle?
Medial surface of the mandibular angle
What is the insertion of the medial pterygoid muscle?
Medial surface of the mandibular angle
What innervates the medial pterygoid muscle?
Mandibular division of the trigeminal nerve
What is the action of the medial pterygoid muscle?
Elevates and protrudes the mandible
What is the origin of the lateral pterygoid muscle?
Lateral surface of lateral pterygoid plate (under greater wing of sphenoid)
What is the insertion of the lateral pterygoid muscle?
Neck of the condyle of the mandible
Neck of the temporomandibular joint
What innervates the lateral pterygoid muscle?
Mandibular branch of the trigeminal nerve
What is the action of the lateral pterygoid muscle?
Depresses and protrudes the mandible
Moves articular disc forward
What are the two movements involved of the jaw in chewing?
Movement of jaw upwards and downwards
Protrusion of jaw forwards and backwards
Name the compartments of the jaw in chewing?
Upper compartment
Lower compartment
How are the compartments of the jaw divided?
They are divided by a fibrocartilaginous articular disc
What are the borders of the temporal fossa?
Zygomatic arch, temporal and sphenoid bones on external part of the skull
Where is the infra temporal fossa located?
Between the pharynx and the ascending ramus of the mandible
What is the roof of the infra temporal fossa?
The greater wing of the sphenoid (base of skull)
What is the roof of the infra temporal fossa?
The greater wing of the sphenoid (base of skull)
What is the anterior border of the infratemporal fossa?
Pterygoid plates of sphenoid bone
What is the posterior border of the infratemporal fossa?
Styloid process and tympanic plate
Name the 2 cranial nerves found in the infratemporal fossa
Mandibular division of trigeminal nerve
Facial nerve
Through which foramen of the skull does the mandibular division of the trigeminal nerve exit through?
Foramen ovale
What branch does the mandibular nerve give off when it exits foramen ovale?
Meningeal branch of the mandibular nerve
Through which foramen does the meningeal branch of the mandibular nerve re enter the skull?
Foramen spinosum
What does the meningeal branch of the mandibular nerve innervate?
The dura mater in the skull
What is the otic ganglion?
It is one of 4 peripheral parasympathetic ganglia that give parasympathetic innervation to the skull
Where is the otic ganglion located?
Immediately below the foramen ovale where the mandibular nerve also exits the foramen ovale
Where the the parasympathetic fibres of the otic ganglion innervate?
Innervates the parotid gland for salivation
What muscles does the anterior division of mandibular nerve give motor innervation to?
All muscles of mastication apart from the posterior belly of digastric
Tensor veli palatini muscle of the soft palate
What is the name of the only sensory nerve from the anterior division of the mandibular nerve?
Long buccal nerve
What does the long buccal nerve give sensory innervation to?
Inside and outside of the cheek
Rejoins the anterior division of the mandibular nerve in the infra temporal fossa
Is the posterior division of the mandibular division of the trigeminal mainly sensory or motor?
Mainly sensory fibres
Is the posterior division of the mandibular division of the trigeminal mainly sensory or motor?
Mainly sensory fibres
Name the nerve that innervates the tongue that originates from the posterior branch of mandibular division
Lingual nerve
What innervation does the lingual nerve give to the tongue?
Sensory innervation to anterior 2/3rds (taste)
What innervation does the lingual nerve give to the tongue?
Sensory innervation to anterior 2/3rds (taste)
Name the nerve from the posterior branch of mandibular division of trigeminal that innervates the lower lip, teeth and chin
Inferior alveolar nerve
Name a parasympathetic nerve that ‘hitchhikes’ with the lingual
Chorda tympani
From which cranial nerve is chords tympani a branch from?
Facial nerve
What does the inferior alveolar nerve become as it leaves the mental foramen of mandible?
Mental nerve
What muscles are innervated by the posterior branch of the mandibular nerve?
Mylohyoid and anterior belly of digastric
What muscles are innervated by the posterior branch of the mandibular nerve?
Mylohyoid and anterior belly of digastric
What is the only motor nerve of the posterior branch of the mandibular nerve?
The nerve that innervates the mylohyoid and anterior belly of digastric
Name the nerve of the posterior branch of the mandibular division of the trigeminal that innervates the temple, auricle and tympanic membrane
Auriculotemporal nerve
Is the auriculotemporal nerve of the posterior branch of mandibular have sensory or motor function?
It is a sensory nerve
Name the 2 cranial nerves that have fibres running in the infratemporal fossa
Trigeminal
Facial
Name the 2 main branches of the external carotid artery
Superficial temporal artery
Maxillary artery
What are the 3 main branches of the maxillary artery?
Middle meningeal artery
Superior alveolar artey
Inferior alveolar artery
What are the 3 main branches of the maxillary artery?
Middle meningeal artery
Superior alveolar artey
Inferior alveolar artery
What does the inferior alveolar artery supply?
Body of mandible and pulp of teeth
Becomes the mental artery
What does the superior alveolar artery supply
Maxillary arch and jaw
What does the middle meningeal artery supply?
Dura mater and cranial bones
What does the middle meningeal artery supply?
Dura mater and cranial bones
What does the superficial temporal artery supply?
Forehead and scalp
Which plexus drains most the the facial structures and temporal region?
Pterygoid plexus
Which vein drains into the external jugular vein?
Retro mandibular vein
Name the vein that connects the pterygoid plexus to the cavernous sinus?
Facial vein
Why is the connection of the pterygoid plexus to the cavernous sinus significant?
Shows how infections of the teeth can spread to the brain region
What can happen to local anaesthetic applied to posterior superior alveolar nerves because of their proximity to pterygoid plexus?
The anaesthetic is placed into the pterygoid plexus and cavernous sinus instead
Is the temporomandibular joint synovial?
Yes!
Is the temporomandibular joint synovial?
Yes!