Jacobson D M
Department of Neurology, Marshfield Clinic, Wis., USA.
Arch Neurol. 1997 Apr;54(4):401-4. doi: 10.1001/archneur.1997.00550160045014.
A lesion affecting the optic radiations may produce a quadrantanopia based on the topographical arrangement of the geniculocalcarine tract.
To determine the localizing associations of a quadrantic visual field defect.
Retrospective study of case records of 41 patients with inferior quadrantanopia and 30 patients with superior quadrantanopia caused by disorders affecting the posterior visual pathway. The responsible lesion was identified with neuroimaging techniques.
Neuro-ophthalmology referral practice in a large multispecialty clinic that provides primary, secondary, and tertiary medical care.
Cerebrovascular disorders accounted for most lesions. The location (and frequency) of lesions causing inferior quadrantanopia was occipital lobe (76%), parietal lobe (22%), and temporal lobe (2%). Other localizing signs were associated with 6%, 89%, and 0% of lesions located in the occipital, parietal, and temporal lobes, respectively. The location (and frequency) of lesions causing superior quadrantanopias was occipital lobe (83%), parietal lobe (3%), and temporal lobe (13%). Other localizing signs were associated with 4%, 100%, and 0% of lesions located in the occipital, parietal, and temporal lobes, respectively.
A patient with a neurologically isolated quadrantanopia is likely to have a lesion in the occipital lobe, although, in the case of a superior quadrantanopia, the possibility of a temporal lobe lesion can not be excluded using clinical criteria only. Quadrantanopias caused by lesions of the parietal lobe usually are associated with other localizing signs.
基于膝距束的拓扑排列，影响视辐射的病变可能导致象限盲。
确定象限性视野缺损的定位关联。
对41例因影响后视觉通路的疾病导致下象限盲的患者和30例上象限盲患者的病例记录进行回顾性研究。通过神经影像学技术确定责任病变。
一家大型多专科诊所的神经眼科转诊科室，提供初级、中级和三级医疗服务。
大多数病变由脑血管疾病引起。导致下象限盲的病变部位（及频率）为枕叶（76%）、顶叶（22%）和颞叶（2%）。其他定位体征分别与位于枕叶、顶叶和颞叶的6%、89%和0%的病变相关。导致上象限盲的病变部位（及频率）为枕叶（83%）、顶叶（3%）和颞叶（13%）。其他定位体征分别与位于枕叶、顶叶和颞叶的4%、100%和0%的病变相关。
患有神经孤立性象限盲的患者可能在枕叶有病变，尽管在上象限盲的情况下，仅使用临床标准不能排除颞叶病变的可能性。由顶叶病变引起的象限盲通常与其他定位体征相关。
