Tactile agnosia
Tactile Agnosia
Tactile agnosia (/tækˈtaɪl ægˈnoʊziə/), also known as astereognosis, is a form of agnosia that impairs an individual's ability to recognize objects by touch based on their texture, size, and weight.
Etymology
The term "tactile agnosia" is derived from the Greek words "taktos" meaning "touch", and "agnosia" meaning "ignorance". The term "astereognosis" is also derived from Greek, with "a-" meaning "without", "stereo-" meaning "solid", and "-gnosis" meaning "knowledge".
Definition
Tactile agnosia is a condition in which an individual has difficulty recognizing objects by touch alone, despite having intact sensory pathways. This condition is often associated with lesions in the parietal lobe of the brain, particularly the postcentral gyrus, which is responsible for processing tactile sensory information.
Related Terms
- Agnosia: A general term for a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is there any significant memory loss.
- Parietal Lobe: One of the four major lobes of the brain in the cerebral cortex, and it plays a key role in sensory perception and integration, including the management of taste, hearing, sight, touch, and smell.
- Postcentral Gyrus: The primary receptive area for the sense of touch in the human brain, located in the parietal lobe.
See Also
External links
- Medical encyclopedia article on Tactile agnosia
- Wikipedia's article - Tactile agnosia
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