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Old 08-04-2012
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Default Cranial nerve pathways - Corticobulbar tract

Listening to DIT right now and he gave a tip that (for example) if you have a weakness or whatever such as your RIGHT soft palate is collapsed, then you need to work backwards and find all of the possible lesion sites.

For example:
  • Pt. has a RIGHT sided soft palate weakness (ulna deviating to the left)
  • RIGHT vagal nerve (CN X) innervates this area
  • RIGHT nucleus ambiguus houses that nerve
  • LEFT corticobulbar tract is theoretically the UMN
  • LEFT motor cortex of the soft palate area sends the initial signal
I guess my question is: Besides the facial nerve (CN VII), do all MOTOR cranial nerves and their respective spinal nuclei function this same way? (nuclei ipsilaterally, and motor cortex contralaterally)

Follow up question: Besides the facial nerve (CN VII), do the sensory pathways all follow a similar route? (nuclei ipsilaterally, and sensory cortex contralaterally)
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