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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.
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.
Thumos, also spelled thymos (Ancient Greek: θυμός), is the Ancient Greek concept of ' spiritedness ' (as in "a spirited stallion" or "spirited debate"). [1] The word indicates a physical association with breath or blood and is also used to express the human desire for recognition. It is not a somatic feeling, as nausea and dizziness are.
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.
Dysdiadochokinesia is a feature of cerebellar ataxia and may be the result of lesions to either the cerebellar hemispheres or the frontal lobe (of the cerebrum), it can also be a combination of both. [3]
S. Scene (perception) Scene statistics; Self-image; Sensation (fiction) Sensorium; Sensory cue; Sensory deprivation; Sensory design; Sensory friendly; Sensory gating
Astereognosis (or tactile agnosia if only one hand is affected) is the inability to identify an object by active touch of the hands without other sensory input, such as visual or sensory information.
Semantic associations are how people assign meaning to concepts and play a significant role in certain types of synesthesia, particularly in linguistic-based forms like grapheme-color synesthesia. In these cases, specific letters or words evoke colors, suggesting that semantic processing may link otherwise separate sensory experiences.