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Astereognosis

An inability to perceive the shape of an object by handling it.

In a simple test for astereognosis, the doctor has her patient close his eyes, places a key in his hand, and asks him to identify the object.

Astereognosis
APA Reference
Grinnell, R. (2018). Astereognosis. Psych Central. Retrieved on August 13, 2018, from https://psychcentral.com/encyclopedia/astereognosis/