Search results
Results from the WOW.Com Content Network
Other types of discrimination like graphesthesia and spatial discrimination also exist but are not as extensively researched. [3] Tactile discrimination is something that can be stronger or weaker in different people and two major conditions, chronic pain and blindness, can affect it greatly.
Graphesthesia can be considered as a type of synthetic sensation as it involves a complex interaction between three neural components i.e. Tactile sensation, two point discrimination and cortical component that stores infirmation about the symbol/letter that is being traced in the skin and was learned through some previous experience.
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.
Two-point discrimination (2PD) is the ability to discern that two nearby objects touching the skin are truly two distinct points, not one.It is often tested with two sharp points during a neurological examination [1]: 632 [2]: 71 and is assumed to reflect how finely innervated an area of skin is.
The dorsal column–medial lemniscus pathway (DCML) (also known as the posterior column-medial lemniscus pathway (PCML) is the major sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (body position) from the skin and joints.
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. An individual with astereognosis is unable to identify objects by handling them, despite intact elementary tactile, proprioceptive, and thermal ...
This sensory information is transmitted by the posterior column-medial lemniscus pathway of the spinal cord, which also carries the sensations of fine touch, stereognosis, tactile pressure, graphesthesia, texture recognition, kinesthesia, two-point discrimination, proprioception, and vibration.
Tactile and visual informations can also be integrated in other peripersonal space regions, such as around the face. [12] Another similar modulation interaction is between audition and touch. The contralesional tactile detection is hampered by sounds in tactile extinction patients.