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Graphesthesia is the ability to recognize writing on the skin purely by the sensation of touch. Its name derives from Greek graphē ("writing") and aisthēsis ("perception"). Graphesthesia tests combined cortical sensation; therefore, it is necessary that primary sensation be intact.
Graphesthesia is the ability in which a person is able to recognize a number or letter that is written on the person's skin. [3] Like other tactile discrimination tests, the test for this is a measurement of the patient's sense of touch, and requires that the patient perform the test voluntarily and without visual contact.
A tilt table test (TTT), occasionally called upright tilt testing (UTT), is a medical procedure often used to diagnose dysautonomia or syncope. Patients with symptoms of dizziness or lightheadedness, with or without a loss of consciousness ( fainting ), suspected to be associated with a drop in blood pressure or positional tachycardia are good ...
A neurological examination is the assessment of sensory neuron and motor responses, especially reflexes, to determine whether the nervous system is impaired. This typically includes a physical examination and a review of the patient's medical history, [1] but not deeper investigation such as neuroimaging.
The test takes approximately 12–20 minutes to carry out using manual scoring which is greatly reduced with the aid of computer testing. [ 6 ] [ 7 ] The test results produce a number of useful psychometric scores, including numbers, percentages, and percentiles of: categories achieved, trials, errors, and perseverative errors.
Agraphesthesia, or the lack of graphesthesia ability, results from brain damage, particularly to the parietal lobe, thalamus, and secondary somatosensory cortex. [1]A significant relationship has been found between agraphesthesia and people living with Alzheimer's disease.
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The results of each activity are scored to give a total score out of 100 (18 points for attention, 26 for memory, 14 for fluency, 26 for language, 16 for visuospatial processing). The score needs to be interpreted in the context of the patient's overall history and examination, but a score of 88 and above is considered normal; below 83 is ...