BDS2 Anatomy (Trigeminal Nerve, etc) Flashcards
what are the 2 divisions of the trigeminal nerve?
sensory
motor
why is the sensory route of the trigeminal nerve important
aiming for with LA
supples the skin of face; nasal and sinus mucosa and teeth
what does the motor route of the trigeminal nerve supply
muscles of mastication and 4 other muscles
aware of so know side effects
trigeminal nerve is CN
V
special feature of trigeminal nerve
largest CN nerve
3 divisions of trigeminal nerve
Ophthalmic V1
Maxillary V2
Mandibular V3
what branches of the CNV are targeted in local anaesthesia
CNV2 and 3 (maxillary and mandibular)
CNV1 ophthalmic can show symptoms
what is a foramen
hole
what is a notch
semi-circular opening
ligament disintegrates - get notch form
where does CNV1 exit
supra orbital notch/formamen
above the human orbit
where does CNV2 exit
infraorbital foramen
below orbit
2nd branch of CNV2
where does CNV3 exit
metal foramen
below the mandibular teeth
what is the frontal process of hard palate called
palatine process of maxilla
what is the dorsal section of hard palate called
horizontal plate of palatine bone (not maxilla)
what are the 3 openings on the hard palate
from front to back
- incisive foramen
- greater palatine foramen
- lesser palatine foramen
what are the functional purposes of the osteology of the mandible
condylar process, ramus, angle, body
- Site of muscle attachments
- Foramina for passage of neurovascular structures
- Lower teeth in alveolar process
condylar process
part of mandible (dorsal head)
part of TMJ - feel on opening and closing
coronoid process
part of mandible (anterior head)
site of attachment of temporalis
mandibular foramen
where the inferior alveolar nerve passes on the ramus of mandible
lingula
on the internal mesial side of the ramus of mandible
- can feel not easy to see
where does the CNV exit through on the base of the skull
through the mid-level of human brainstem pons
what are the 2 components of the CNV
special visceral efferent
general somatic afferent
special visceral efferent functions of the CNV
Motor from motor nucleus in the pons
Predominantly to muscles of mastication
general somatic afferent functions of CNV
To the mesencephalic (midbrain), chief (pons) and spinal nuclei (medulla)
Sensory is vital for clinical practice
- More complex – 3 brainstem nuclei
- Different sensory information processed at different parts of the brain
Fibres come together and exit brainstem at pons level