Abarognosis is a loss of the ability to detect the weight of an object held in the hand or to tell the difference in weight between two objects. This deficit may be caused by damage to the parietal lobe

Parietal lobe

The parietal lobe is a part of the Brain positioned above the occipital lobe and behind the frontal lobe.The parietal lobe integrates sensory information from different modalities, particularly determining spatial sense and navigation. For example, it comprises somatosensory cortex and the...

 on the side of the brain

Brain

The brain is the center of the nervous system in all vertebrate and most invertebrate animals—only a few primitive invertebrates such as sponges, jellyfish, sea squirts and starfishes do not have one. It is located in the head, usually close to primary sensory apparatus such as vision, hearing,...

opposite of the deficit. The American Heritage Medical Dictionary defines abarognosis as "Loss of the ability to sense weight."