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Psychologists formerly characterized dyschiric patients to be unable to discriminate or report external stimuli. This left the patients incapable of orienting sensory responses in their extrapersonal and personal space. Patients with dyschiria are unable to distinguish one side of their body in general, or specific segments of the body.
Hemispatial neglect can have a wide range in terms of what the patient neglects. The first range of neglect, commonly referred to as "egocentric" neglect, is found in patients who neglect their own body or personal space. [19] These patients tend to neglect the opposite side of their lesion, based on the midline of the body, head, or retina. [20]
Patients with a right hemisphere lesion show left sided neglect in other modalities and fail to respond to the left contralateral nostril, thus the representational theory is supported. It was suggested that since the olfactory sensory pathways to the cerebral hemispheres were not crossed, a neglect should have occurred on the right side if a ...
Evidence indicates that damage to the right hemisphere often results from a stroke or pre-existing hemispatial neglect, or inattention to the left visual field (Antoniello, 2016) (Keenan, 2004). Individuals who suffer from somatoparaphrenia, a specific form of asomatognosia, ignore or deny ownership of a body part contralateral to the brain ...
Motor neglect concerns all proximal and distal movements, involving both the upper and lower limb in automatic gestures. Taxonomy of motor neglect symptoms is diverse: poor use of the affected limb, difficulty in bimanual activities (such as opening a bottle), spontaneous gestures reduced especially while speaking and, lack of "swing" of the arm while walking.
Prism adaptation can be used to rehabilitate the visuo-spatial deficits of neurological disorders such as unilateral neglect.It has become clear that with respect to being used as a long-term rehabilitative tool, prism adaptation is only effective when it is repeated over many sessions and with sufficiently strong prism goggles (Newport and Schenk, 2012).
Visual feedback has also been studied in relation to visual extinction. Patients were asked to touch a known target in a darkened room. A light attached to the patient's hand was sometimes briefly illuminated, to provide information about where the hand was in relation to the target. In some of these trials, a distracting light was also lit ...
"A patient with this condition may be unaware of what he or she cannot see and frequently bumps into walls, trips over objects or walks into people on the side where the visual field is missing." [2] A related phenomenon is hemispatial neglect, the possible neglect of the right or left. The patient is not conscious of its existence.