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!
Name the 3 lobes of the parotid gland
Superficial lobe
Deep lobe
Glenoid lobe
Which important nervous structure passes close to the parotid gland?
Facial nerve CN7
What is the border of the roof of the mouth?
Hard and soft palate
What is the border of the floor of the mouth?
Mylohyoid muscle
What is the anterior boundary of the mouth?
Teeth and lips
What is the posterior boundary of the mouth?
Palatoglossal arches
Name the 2 potential spaces within the oral cavity
Buccal cavity
Oral cavity proper
Name the 2 potential spaces within the oral cavity
Buccal cavity
Oral cavity proper
What is the difference between the buccal cavity and the oral cavity proper?
In the oral cavity proper the teeth are occluded, they are not in the buccal cavity
Name the ridges present on the roof of the mouth
Rugae
Name the 2 arteries supplying the hard and soft palate
Greater palatine artery
Lesser palatine artery
How many muscles of the palate are there?
5
Name the 5 muscles of the palate
Levator palati
Tensor veli palatini
Palatoglossus
Palatopharyngeus
Musculus uvulae
What nerve innervates the muscles of the palate apart form tensor veli palatini?
Pharyngeal plexus and laryngeal nerves
Which 2 muscles form the floor of the mouth?
Mylohyoid
Geniohyoid
Which 2 muscles form the floor of the mouth?
Mylohyoid
Geniohyoid
Name the 3 salivary glands?
Parotid
Submandibular
Sublingual
Name the nerve that lies below the submandibular salivary gland
Hyopglossal nerve CN12
Which nerve lies above the submandibular salivary gland?
Lingual nerve
Through which muscle does the parotid gland drain into the oral cavity?
Buccinator muscle
Through which muscle does the parotid gland drain into the oral cavity?
Buccinator muscle
What gives sympathetic innervation to the parotid glands?
Superior cervical ganglion
Which cranial nerve gives parasympathetic innervation to the parotid gland through the otic ganglion?
Glossopharyngeal nerve (IX)
What is the motor innervation of the hypoglossal nerve (XII)?
Innervates all muscles of the tongue NOT palatoglossus
Which cranial nerve loops around the external carotid artery?
Hypoglossal nerve
What nerve innervates the gums (gingivae)?
Lingual nerve
How many extrinsic muscles of the tongue are there?
2
Name the 2 extrinsic muscles of the tongue?
Genioglossus
Geniohyoid
What is the origin of genioglossus?
Anterior part of the mandible
What is the insertion of genioglossus?
Undersurface of the tongue
What innervates genioglossus?
Hypoglossal nerve (XII)
What is the action of genioglossus?
Protrusion and depression of tongue
Moves tip of tongue up and down
What is the origin of geniohyoid?
Anterior part of the mandible
What is the insertion of geniohyoid?
Hyoid bone
What innervates geniohyoid?
Hypoglossus nerve (XII)
What is the action of geniohyoid?
Pulls the hyoid upwards and forwards
What is the action of geniohyoid?
Pulls the hyoid upwards and forwards
How many intrinsic tongue muscles are there?
3
Name the 3 intrinsic tongue muscles
Styloglossus
Palatoglossus
Hyloglossus
What is the origin of styloglossus?
Styloid process
What is the insertion of styloglossus?
Back of the mouth - passes between the internal and external carotid artery
What innervates the styloglossus?
Hypoglossal nerve XII
What is the action fo the styloglossus?
Modifies shape of tongue, is attached to the styloid process
What is the raphia of the tongue?
The mucous membrane that is visible in the underside of the tongue
What is the palatine aponeurosis?
Where the muscles fo the soft palate attach to on the posterior edge of the hard palate
What is the origin of palatoglossus?
Palatine aponeurosis
What is the insertion of the palatoglossus?
Side of the tongue
What is the action of palatoglossus?
Raises the posterior part of the tongue
What is the action of palatoglossus?
Raises the posterior part of the tongue
What innervates palatoglossus?
Pharyngeal plexus and the laryngeal nerves
What is the origin of hyloglossus?
Sides of the hyoid
What is the insertion of hyloglossus?
Tongue
What is the action fo hyloglossus?
Pulls the tongue down in the mouth
What innervates hyloglossus?
Hypoglossal nerve XII
What is the sulcus terminalis of the tongue?
V shaped line between the anterior 2/3 and posterior 1/3 of the tongue
What is the foramen caecum on the tongue?
Pit in the midline of the tongue at apex of the sulcus terminalis (origin of primitive thyroid gland)
What is the frenulum of the tongue?
Median fold of mucous membrane beneath the tip of the tongue
What is the median glossoepiglottic fold of the tongue?
Midline fold of mucous membrane that passes back to the epiglottis
What is the gustatory epithelium of the tongue?
The name of the mucous membrane of the tongue
List the 4 different types of papillae on the tongue
Vallate papillae
Foliate papillae
Filiform papillae
Fungiform papillae
List the 4 different types of papillae on the tongue
Vallate papillae
Foliate papillae
Filiform papillae
Fungiform papillae
Is the lingual artery a branch of the internal or external carotid artery?
External carotid artery
Is the lingual artery a branch of the internal or external carotid artery?
External carotid artery
What 2 branches on lingual arteries does the lingual artery give off?
Dorsal lingual arteries
Deep lingual arteries
What 2 branches on lingual arteries does the lingual artery give off?
Dorsal lingual arteries
Deep lingual arteries
Which cranial nerve gives sensory + taste sensation to the most posterior part of the tongue?
Vagus nerve X
Which cranial nerve gives sensory + taste sensation to the area of tongue posterior to the sulcus terminalis?
Glossopharyngeal nerve IX
Which nerve gives touch, temperature and pain sensation to the anterior 2/3 of the tongue?
Lingual nerve, from the mandibular division of trigeminal nerve V
Which nerve give taste sensation to the anterior 2/3 of the tongue?
Chorda tympani, from the facial nerve VII
Name the 5 main muscles of facial expression
Orbicularis oculi
Frontalis
Occipitalis
Orbicularis oris
Buccinator
What is the origin of orbiculares oculi?
Medial palpebral ligament
What is the insertion of orbicularis oculi?
Lateral palpebral ligament
What is the action of orbiculares oculi?
Gentle closing of the eyelids
What innervates orbiculares oculi?
Facial nerve
What is the origin of frontal?
Skin of eyebrows
What is the origin of frontal?
Skin of eyebrows
What is the insertion of frontalis?
Superior epicranial aponeurosis
What is the action of frontalis?
Wrinkles forehead, raises eyebrows
What innervates frontalis?
Facial nerve
What is the origin of occipitalis?
Lateral part of the superior nuchal line
What is the insertion of occipitalis?
Epicranial aponeurosis
What is the action of occipitalis?
Draws scalp backwards
What innervates occipitalis?
Facial nerve
What is the origin of orbicularis oris?
No bony origin, from the muscles in the maxillary and mandibular area
What is the insertion of oribularis oris?
Attaches to the lips
What is the action of orbiculares oris?
Closes and protrudes the lips
What innervates orbiculares oris?
Facial nerve
What is the origin of buccinator?
Posterior part of maxilla and mandible
What is the insertion of buccinator?
Blends onto orbiculares oris and the lips
What is the action of buccinator?
Presses cheek against the teeth, compresses cheek when they are distended (helps with chewing)
What innervates buccinator?
Facial nerve
Is the facial artery a branch if the internal or external carotid?
External carotid
Which 2 vessels does the facial artery anastomose with?
Superficial temporal artery
Orbital and scalp vessels
Describe the pathway of the facial artery
Passes across the mandible and moves past mouth to the side of the nose, then anastomoses
Describe the pathway of the facial artery
Passes across the mandible and moves past mouth to the side of the nose, then anastomoses
Describe the pathway of the facial vein
Follows the pathway of the facial artery
What does the facial vein drain into?
Joins the retromandibular vein to form the common facial vein. This then drains into the internal jugular vein
With which veins does the facial vein communicate with?
Orbital veins
Intracranial sinuses
What is the clinical importance of the facial vein being connected to the intracranial region via the intracranial sinuses?
Means infections can easily spread form the region of the face or orbit and into the cranium
Is the facial nerve entirely motor or sensory?
The facial nerve has only motor control
Is the facial nerve entirely motor or sensory?
The facial nerve has only motor control
Which muscles are innervated by the facial nerve?
All facial muscles apart from muscles of mastication
Which muscles are innervated by the facial nerve?
All facial muscles
Name the 6 main terminal branches of the facial nerve
Temporal
Zygomatic
Buccal
Mandibular
Cervical
Posterior auricular
What does the posterior auricular branch of the facial nerve innervate?
Posterior belly of the digastric
Stylohyoid
What nerve branch gives sensory innervation to the face?
Cutaneous branches of the maxillary, mandibular, ophthalmic division of the facial nerve
What nerve branch gives sensory innervation to the face?
Cutaneous branches of the maxillary division of the facial nerve
Is Bell’s palsy an upper or lower motor neurone lesion?
It is a LMN lesion
Is stroke an upper or lower motor neurone lesion?
It is an UMN lesion
Is stroke an upper or lower motor neurone lesion?
It is an UMN lesion
What is the visible difference oil a patient between Bell’s palsy and stroke?
Bell’s palsy -> whole face droops, all facial muscles affected
Stroke -> eyebrows can still be raised as they are innervated by both left and right side of the brain
Which branches of the facial nerve supply the platysma muscle?
Cervical branches
From which cranial nerve is the greater petrosal nerve a branch of?
Facial nerve
From which cranial nerve is the greater petrosal nerve a branch of?
Facial nerve
What does the greater petrosal nerve supply?
Lacrimal gland
From which cranial nerve is the chords tympani a branch of?
Facial nerve
What does chords tympani supply?
Anterior 2/3 of the tongue (taste)
What does chords tympani supply?
Anterior 2/3 of the tongue (taste)
Parasympathetic fibres to which 2 glands travel with chords tympani?
Submandibular and sublingual glands
Which 2 congenital abnormalities can rise from incomplete fusion of the maxillary and mandibular arch in development?
Cleft lip
Cleft palate
Which 2 congenital abnormalities can rise from incomplete fusion of the maxillary and mandibular arch in development?
Cleft lip
Cleft palate
At which part of the mandible are fracture more serious and may need intervention?
Ascending ramus of the mandible
At which part of the mandible are fracture more serious and may need intervention?
Ascending ramus of the mandible
What is the main indication of Bell’s palsy?
Inability to screw eyes shut or show teeth on one side or both sides
What is the main indication of stroke?
Can still voluntarily move muscles around eye and forehead
During swallowing, there is a brief interruption of _________
Breathing
What is a symptom of bulbar’s palsy?
Choking and passing of food up into nose
What is a symptom of bulbar’s palsy?
Choking and passing of food up into nose
Contraction of which muscle of the pharynx initiates passage of food bolus through oesophagus?
Cricopharyngeus