Why is stereognosis important for hand function?
A. Without stereognosis our hands would not be able to sweat.
B. Without it we could not discriminate cold from hot.
C. Without it we could not identify an item with our vision occluded.
D. Without it we could not discern sharp items from dull items.
ANS: C
The use of both proprioceptive information and touch to identify an item with vision occluded is called stereognosis. Without stereognosis it is impossible to pick out a specific object, such as a coin or a key, from one's pocket; use a zipper that fastens on one's back; or pick up a plate from a sink of sudsy water.
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