Flashcards in Lecture 3: Ascending Sensory Pathways II Deck (12):
What are the three segments of the trigeminal nerve?
What segment of the trigeminal nerve supplies the upper teeth?
Maxillary - upper alveolar nerve
What segment of the trigeminal nerve supplies the lower teeth?
Mandibular - lower alveolar nerve
Where are the cranial nerve nuclei located?
Within the brainstem
What is a cranial nerve sensory nucleus?
The equivalent of the dorsal grey horn in the spinal cord i.e. primary neuron synapses with secondary neuron (check this).
Which four cranial nerves carry general sensation from the head and all travel in the trigeminal sensory pathway?
Trigeminal V(5) - face
Vagus X(10) - auditory canal, larnyx, pharnyx, oesophagus
Facial VII(7) - external ear
Glossopharyngeal IX(9) - middle ear, posterior 1/3 of tongue and pharnyx
What are the three parts of the trigeminal nucleus?
Which part of the spinal nucleus do pain and temperature fibres run to?
Caudal spinal nucleus - cross and ascend contralaterally.
Which part of the spinal nucleus to touch and pressure fibres run to?
More rostrally...otherwise exactly the same.
Which trigeminal nucleus receives fibres for discriminitive touch?
Which trigeminal nucleus receives fibres for proprioception?