Cranial nerves - trigeminal Flashcards
Which division of the trigeminal nerve supplies segment 1?
Opthalmic
Which 2 divisions of the trigeminal nerve supply segment 2?
Maxillary division – above oral opening
Mandibular division – below oral opening
Which types of fibres does the opthalic branch have, and where does it supply in the head?
- Ectoderm so SA only
- Skin of forehead and upper eyelid
- Cornea
- Medial eyelid
- Dorsal turbinates
- Base of horn
Which types of fibres does the maxillary branch have, and where does it supply in the head?
- Ectoderm so SA only
- skin of lower eyelid
- mucosa of nasal cavity
- mucosa of hard and soft palate
- cheek and teeth of upper jaw
- upper lip and vibrissae
- vestibule of nostril
Which types of nerve fibres supply the mandibular division?
Ectoderm - SA
Muscles of chewing - SVE
What are the 3 jaw closing muscles?
- Masseter m.
- Pterygoid m.
- Temporalis m.
Which muscle is the jaw opener?
Rostral belly of Digastricus m.
How many nerves supply the horn?
5
Why can only 4/5 nerves to the horn be blocked when being removed?
The nerve to the frontal sinus isn’t superficial
Which arch/segment gives rise to the muscles of chewing?
Arch 1
Segment 2
The vagus nerve supplies which types of fibres to the head?
SA, AA, AE
The cranial division of the accessory nerve supplies which fibres to the head?
SVE
The vagus-accessory complex derives from which pharyngeal arches?
4 and 6
