Card 4 / 23: Regarding this poorly myelinated tract:
A.)
It consists of first order sensory axons with ascending and descending branches which run longitudinally for 1 to 3 segments.
B.)
It is made up of second order sensory axons which ascend ipsilaterally to the gracile nucleus in the medulla.
C.)
It contains axons responsible for the monosynaptic reflex.
Answer:
A.) It consists of first order sensory axons with ascending and descending branches which run longitudinally for 1 to 3 segments.
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The localization of spinal cord injuries is an example of the practical use of information about dermatomes. Sensory loss from peripheral nerve lesions have a different distribution and usually are both sensory and motor while a cord lesion might be sensory, motor or both.
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Neuroanatomy 05 Somesthetic Sensation
Author:
M.D.Stephen VoronLecturer
University of Utah
USA
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