Trigeminal - Clinical Notes Flashcards
What would happen in an entire trigeminal nerve lesion?
Anterior half of scalp
Face except from around the angle of the mandible
Cornea and conjunctiva
Mucous membrane of the nose
Anterior part of tongue
Muscles of mastication paralysed
What is the role of the lingual nerve?
It transports the special visceral Afferent fibres from the Chandra tympani responsible for taste perception in the anterior two-thirds of the tongue
What nerve innervates the sublingual and submandibular glands?
Lingual via the Chandra tympani nerve (facial nerve)
What are 3 tests for the trigeminal nerve?
Corneal reflex
Motor V testing
Jaw jerk
What does the corneal reflex test test?
Blinking reflex
Sensory of ophthalmic
How would you tests the function of the mandibular motor nerve?
Motor V testing
Observe the symmetry of opening and closing of the mouth
Patient clench jaw and then attempt to force jaw open
What nerves does the jaw jerk test?
Upper motor neuron lesions (brain)
Controlling muscles of mastication
What nerve is damaged if the jaw doesn’t jerk back?
Upper motor neurones
Effecting suckers of mastication
Where is the infratemporal fossa located?
Beneath the base of the skull between the pharynx medially and ramus mandible laterally
What are the contents of the infratemporal fossa?
medial and lateral pterygoid muscles.
mandibular division of trigeminal nerve chorda tympani branch of facial nerve otic ganglion
maxillary artery
middle meningeal artery
inferior alveolar vessels
pterygoid venous plexus and maxillary vein.
A - pterygomaxillary fissure
B - pterygoid plate
Surgeons often inject into the infratemporal fossa, what is the risk of this?
Penetrate the pterygoid plexus of veins
Result in blood clots
What is the effect if injecting into the pterygoid plexus of veins?
Formation of large haemotoma
Where is the pterygopalatine fossa located?
What connects the pterygopalatine fossa and the infratemporal fossa?
Pterygomaxillary fissure
What ganglion is found in the pterygopalatine fossa?
Pterygopalatine ganglion
What is this foremen?
Sphenopalatine foramen
What does the pterygoid canal branch to make?
The greater and lesser palatine foramen
What have these foramen branches from?
The palatine canal, why bar rises from the pterygopalatine fossa
What nerves run through A AND B?
Greater and lesser palatine nerves
