09a transition to cranial n erves and the pathways associated with them see pp 360 370 in book
Download
Skip this Video
Download Presentation
09a Transition to cranial n erves and the pathways associated with them See pp. 360-370 in book

Loading in 2 Seconds...

play fullscreen
1 / 17

09a Transition to cranial n erves and the pathways associated with them See pp. 360-370 in book - PowerPoint PPT Presentation


  • 77 Views
  • Uploaded on

09a Transition to cranial n erves and the pathways associated with them See pp. 360-370 in book. What parts of the PNS are most proximal to the CNS?. Spinal nerves Cranial nerves. Spinal nerves

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' 09a Transition to cranial n erves and the pathways associated with them See pp. 360-370 in book' - craig


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide3

Spinal nerves

    • Described as mixed nerves: carry both sensory (afferent) and motor (efferent) fibers of trunk and limbs
      • Somatic afferent and efferent
      • Autonomic/visceral afferent and efferent
slide4

Spinal peripheral nerves (cont.)

    • Sensory: posterior
      • Dorsal root connects to

dorsal horn of gray matter

      • GSA (general somatic

afferent) and GVA

(general visceral afferent)

    • Motor: anterior
      • Ventral root connects from ventral horn of gray matter: beginning of “final common pathway” of somatic motor system, contains lower motor neurons
      • GSE (general somatic efferent) and GVE (general visceral efferent)
now transition to cranial nerves
Now, transition to cranial nerves
  • Compare cranial nerves to spinal nerves
    • Some cranial nerves are motor only, and some are sensory only. (Only some of the cranial nerves are mixed, like the spinal nerves are)
    • Some of the cranial nerves do not carry both somatic and autonomic nervous system functions; the spinal nerves carry both somatic and autonomic nervous systems functions
slide6

Cranial nerves

    • Some are sensory only, some are motor only, and some are mixed.
    • All have some relation to speech, language, hearing, communication, and/or swallowing
    • Largely voluntary, but some include autonomic and reflexive pathways
    • Organized in pairs
    • Each pair designated by name and Roman numeral
cranial nerves have associated nuclei which are organized in clusters and columns
Cranial nerves have associated nuclei, which are organized in clusters and columns

Damage to nuclei can mimic damage to the cranial nerves themselves

slide9

Focus in on cranial nerves (there are 12 pairs)

  • Roots connect to CNS
    • brainstem
    • uppermost spinal cord
  • Exit brain and pass through skull to reach the sense organs or muscles of head and neck with which they are associated
  • Relatively unprotected (susceptible to damage)
  • All twelve relevant to speech, language, communication hearing, &/or swallowing
  • When cranial nerves or their associated nuclei are damaged, this can be one of the causes of:
    • dysarthria (speech motor disorder)
    • dysphagia(swallowing disorder)
steps in learning cranial nerves
Steps in learning cranial nerves
  • Find location of cranial nerves
  • Learn the names associated with each cranial nerve
  • Overview of organization of cranial nerves
  • Details of each cranial nerve
    • Name and location
    • Function
    • Clinical tests of function
slide13

Cranial Nerves – Dorsal view

Dfdf

Trochlear Nerve (IV)

ad