Card 13 / 23: The dorsal columns are organized:
A.)
Somatotopically with the medial fibers representing the cervical and the lateral fibers representing sacral dermatomes.
B.)
With medial fibers representing sacral regions and lateral fibers cervical regions.
C.)
There is NO somatotopic organization of the dorsal columns.
Answer:
B.) With medial fibers representing sacral regions and lateral fibers cervical regions.
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The cuneate fasciculus is not present below T-7. The cuneate fasciculus along with the gracile fasciculus comprise the dorsal columns. Only the gracile fasciculus is present at the sacral level shown here.
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Neuroanatomy 05 Somesthetic Sensation
Author:
M.D.Stephen VoronLecturer
University of Utah
USA
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