Astereognosis

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Astereognosis (pronounced as: as-ter-eo-gno-sis) is a medical term that refers to the inability to identify objects by touch alone, despite intact sensory pathways. This condition is often associated with lesions of the parietal lobe, particularly the postcentral gyrus.

Etymology

The term "Astereognosis" is derived from the Greek words "a" meaning without, "stereo" meaning solid, and "gnosis" meaning knowledge. Thus, it literally translates to "without solid knowledge".

Related Terms

  • Tactile Agnosia: A condition similar to astereognosis, where the person is unable to recognize objects by touch alone, but can recognize them visually.
  • 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: The part of the brain where the postcentral gyrus is located, which is often associated with astereognosis.
  • Postcentral Gyrus: The primary somatosensory cortex of the brain, responsible for processing tactile sensory information.

See Also

References

  • Neuroanatomy through Clinical Cases. Blumenfeld, H. (2010). Sunderland, MA: Sinauer.
  • Neurology. Brazis, P.W., Masdeu, J.C., Biller, J. (2011). Philadelphia, PA: Saunders.

External links

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