Lecture 3: Ascending Sensory Pathways II Flashcards Preview

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Flashcards in Lecture 3: Ascending Sensory Pathways II Deck (12):
1

What are the three segments of the trigeminal nerve?

Ophthalmic
Maxillary
Mandibular

2

What segment of the trigeminal nerve supplies the upper teeth?

Maxillary - upper alveolar nerve

3

What segment of the trigeminal nerve supplies the lower teeth?

Mandibular - lower alveolar nerve

4

Where are the cranial nerve nuclei located?

Within the brainstem

5

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).

6

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

7

What are the three parts of the trigeminal nucleus?

Mesencephalic
Pontine/Sensory
Spinal

8

Which part of the spinal nucleus do pain and temperature fibres run to?

Caudal spinal nucleus - cross and ascend contralaterally.

9

Which part of the spinal nucleus to touch and pressure fibres run to?

More rostrally...otherwise exactly the same.

10

Which trigeminal nucleus receives fibres for discriminitive touch?

Pontine

11

Which trigeminal nucleus receives fibres for proprioception?

Mesencephalic

12

Where are the primary cell bodies located?

Trigeminal ganglia (except for proprioception fibres to Mesencephalic nucleus)