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Proprioception - stereognosis (see glossary)
The pathway for proprioception and stereognosis (also for the perception of vibration) initially remains on the same side of the spinal cord that it enters, crossing over at the junction between the spinal cord and brain stem.
A lesion of the posterior columns results in a decrease in conscious proprioception and stereognosis (also vibration sense) ipsilaterally below the level of the lesion.
(Actually, the deficit is mostly in stereognosis, since conscious proprioception and vibration sense are to some extent represented in more lateral regions of the cord.)
Addendum: Information for touch, proprioception, stereognosis, and vibration also appears to travel in a pathway called the spinocervicothalamic tract (Fig. 18A).
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