منابع مشابه
Quadrantic deficit reveals anatomical constraints on selection.
Our conscious experience is of a seamless visual world, but many of the cortical areas that underlie our capacity for vision have a fragmented or asymmetrical representation of visual space. In fact, the representation of the visual field is fragmented into quadrants at the level of V2, V3, and possibly V4. In theory, this division could have no functional consequences and therefore no impact o...
متن کاملHemianopsia in dementia with Lewy bodies.
OBJECTIVE To describe the pathologic changes that caused a left homonymous hemianopsia in a patient with dementia with Lewy bodies. DESIGN Report of a case and postmortem studies. MAIN OUTCOME AND RESULTS A 66-year-old woman experienced parkinsonism and left homonymous hemianopsia early in the course of a rapidly progressive dementia that culminated in death only 21 months after the onset o...
متن کاملTemporary homonymous hemianopsia after epidural blood patch
We describe a case in which homonymous hemianopsia developed abruptly following an epidural blood patch procedure. The procedure was performed in a patient complaining of post-dural puncture headache after an emergency Cesarean section under spinal anesthesia. Computed tomography and magnetic resonance imaging demonstrated that air bubbles had moved from the prepontine and premedullar cisterns ...
متن کاملA Quadrantic Bias in Prefrontal Representation of Visual-Mnemonic Space.
Single neurons in primate dorsolateral prefrontal cortex (dLPFC) are known to encode working memory (WM) representations of visual space. Psychophysical studies have shown that the horizontal and vertical meridians of the visual field can bias spatial information maintained in WM. However, most studies and models have tacitly assumed that dLPFC neurons represent mnemonic space homogenously. The...
متن کاملSudden Hemianopsia Secondary to Ethmoid Sinus Mucocele
Paranasal sinus mucoceles are benign cystic lesions, filled with mucus, occurring due to an obstruction of involved sinus ostium. They are indolent, locally expansive, and destructive. Surgical treatment must be performed and, when done at the correct time, may prevent sequelae. We present a case of ethmoid sinus mucocele with orbit involvement and permanent optical nerve injury.
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ژورنال
عنوان ژورنال: The Journal of Nervous and Mental Disease
سال: 1912
ISSN: 0022-3018
DOI: 10.1097/00005053-191201000-00008