Inability to identify, by touch alone, objects placed in the hand such as differentiating between a dime and a quarter.

inability to recognize objects or forms by touch

inability to identify an object by touch. Present in one hand only, on the side opposite to which the brain is damaged. Stereognosis is a higher mental function of the parietal lobe of the brain. It should only be tested for when the lower sensory tracts are undamaged as damage here also causes inability to recognise an object.