Following fixation, all stimuli were presented randomly, and the subjects were instructed to identify which hemispace
the stimulus was presented in.
They lead to hemineglect of the contralesional body and hemispace
in 10 to 33% of patients [11-13].
Visuospatial neglect can be defined as the tendency for decreasing motor behaviors toward orienting to, searching for, and finding stimuli on the opposite hemispace
of brain damage, as well as error tendency in reacting to or reporting orally and/or not being aware of stimuli on the left visual hemispace
We also demonstrated somatosensory ERPs of some of our patients who showed different responses elicited by low intensity electrical stimulation of the median nerve at the wrist depending on the location of the hands either in uncrossed anatomical position or crossed over the body midline to the other hemispace
. Our results indicate that there are cases among patients with hemispatial neglect who do indeed show emergence or increment of responses to left-hand stimulation when the arm is crossed to the right hemispace
Judgments made on chi meric faces elicit reliably a perceptual bias to the left hemispace
, presumed to be due to right hemisphere dominance for emotional processes.
Orientational bias model of unilateral neglect: evidence from attentional gradients within hemispace
. In: Robertson IH, Marshall JC, eds.
Contraversive Pushing and Inattention of the Controlesional Hemispace
. J Clin Experim Neuropsychol.
What drives children's limb selection for reaching in hemispace
? Experimental Brain Research, 156, 325-332.
Persons with visual neglect have significant difficulty reacting to or lose the ability to react to or process visual input in the hemispace
contralateral to the lesion.
Individuals with sensory extinction do not neglect contralesional stimuli unless they are paired with an equal, simultaneous stimulus in the ipsilesional hemispace
(Robertson & Halligan, 1999).
Pseudoneglect: effects of hemispace
on a tactile line bisection task.
Dopamine agonists reorient visual exploration away from the neglected hemispace