Head & Neck 2 Flashcards
What’s the function of the hypoglossal nerve?
Purely motor to the tongue
Where does the maxillary branch of the trigeminal nerve come out?
Foramen Rotundum
What does the maxillary nerve supply sensation to ?
Meninges
Nasal cavity
Sinuses
Pharyngeal wall
Upper teeth
Skin over temple, cheek & upper lip
What supplies the Parasympathetic innervation to the lacrimal gland?
Maxillary nerve
What does the pterygopalatine fossa contain?
Maxillary nerve- zygomatic, nasopalatine, postsup alveolar, greater/lesser palatine, pharyngeal
Pterygopalatine ganglion
Which sinus drain into the nasal cavity?
Maxillary
Frontal
2 Ethmoid
Naso-lacrimal ducts
What vessels form Kiesselbach’s plexus?
Sphenopalatine
Post & Ant Ethmoid
LSuperior labial
Greater Palatine
What are the paranasal sinuses?
Paired frontal
Sphenoid
Maxillary
Ethmoid
Which are the largest sinuses?
Maxillary
Which sinuses are present at birth?
Ethmoid
Maxillary
Sphenoid
When do the frontal sinuses develop?
10years
What are the ages permanent teeth arise?
Central incisors: 7
First molars: 7
Lateral incisors: 8
Canine: 10
Premolars: 11
Second molar: 12
Third molar: 20
What’s the most common nerve blocked in dental anaesthetic?
Inferior alveolar nerve
What nerves innervate the tongue?
Hypoglossal (motor)
Glossopharyngeal (motor & Sensation to post 1/3)
Lingual (sensation to ant 2/3)
What makes up the laryngeal skeleton?
Epiglottis
Thyroid
Arytenoid
Cricoid- complete ring
What bones make up the orbit?
Frontal
Maxilla
Zygoma
Sphenoid
Ethmoid
Lacrimal
Which part of the orbit is damaged in an orbital blow out?
Maxilla Orbit floor broken and falls down into the maxillary sinus below
What are the extra ocular muscles
Superior rectus
Superior oblique
Inferior oblique
Lateral rectus
Medial rectus
Inferior rectus
What muscles does the oculomotor nerve act on?
Medial rectus
Superior & inferior rectus
Inferior oblique
What nerve innervates the lateral rectus
Abducens
What nerve innervates the superior oblique
Troclear
What Sx will you get with a CN6 palsy?
Diplopia in horizontal plane
Eye affected turned inwards
Convergent quint
What Sx will you get with a CN4 palsy?
Vertical diplopia
Eye turned upwards- patient tilts head
Trouble reading or walking downstairs
What Sx will you get with a CN3 palsy?
Eye is down and outwards
Severe diplopia
Ptosis
Fixed & dilated pupils
Loss of accommodation
What are the Sx with a CNIX palsy?
Loss of gag reflex
Dysphagia
Loss of carotid sinus reflux
Loss of test post 1/3
What are the Sx with a CNIX palsy?
Loss of gag reflex
Dysphagia
Loss of carotid sinus reflux
Loss of test post 1/3
Where does the opthalmic nerve give sensation?
Forehead & scalp
Sinuses
Upper eyelid
Cornea
parts of meninges
What is the motor & sensory function of the mandibular nerve?
M: Muscles of mastication, tensor tympani, fibres to parotid gland
S: Lower lip & chin, lower teeth, floor of oral cavity, ant 2/3 tongue, TMJ, external ear, auditory meatus
