the ability to recognize letters, numbers, or shapes drawn on the skin, usually on the palm or back of the hand, without using vision. This test assesses sensory perception and cortical processing abilities related to touch and spatial perception. It is often used in neurological examinations to assess the integrity of somatosensory pathways and to identify disorders that affect sensory processing, such as parietal lobe lesions or peripheral nerve damage. Difficulties with graphesthesia may indicate problems in the brain’s ability to process tactile information.