Altitudinal Hemianopia*

Berkley, William L.; Bussey, Frank R.

doi:10.1016/0002-9394(50)90453-3

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I Detailed a Nalysis (1 ) Possible Causes O F Horizontal1

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1967

1990

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Cited by 24 publications

(2 citation statements)

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“…O ther forms of cranial trau m a which m ay give rise to horizontal visual-field defects include fractures and haemorrhages; one example is a case reported by Berkley and Bussey (1950), in which a cerebellar haem orrhage had caused damage to both upper lips of the calcarine fissure.…”

Section: I Detailed a Nalysis (1 ) Possible Causes O F Horizontalmentioning

confidence: 99%

Horizontal Hemianopias

Schäublin¹

1967

Stereotact Funct Neurosurg

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Section: I Detailed a Nalysis (1 ) Possible Causes O F Horizontalmentioning

confidence: 99%

Horizontal Hemianopias

Schäublin¹

1967

Stereotact Funct Neurosurg

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“…Augenheilk. 177(1980) Neben einem beidseitigen Netzhautarterienastverschluf und dem Ausfall der Sehrinde oberhaib der Fissura calcarina (Berkely, 1950), können Sehnervenläsionen eine bilaterale untere Hernianopsie verursachen.…”

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Bilaterale untere Hemianopsie

Gruber¹

1980

Klin Monatsbl Augenheilkd

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Simultaneous bilateral altitudinal hemianopsia in ischemic optic nerve lesions nearly always involves the lower halves of the visual fields. As regards pathogenesis, systemic hemodynamic disturbance is a prerequisite. In addition local predisposing factors must exist which cause infarction to occur at the characteristic site, i.e., the upper optic disk and the adjacent retrolaminar region. The theories dealing with this problem are reviewed. In this connection a rather unusual case is described.

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Functional specialization in the lower and upper visual fields in humans: Its ecological origins and neurophysiological implications

Previc¹

1990

Behav Brain Sci

612

516

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Functional specialization in the lower and upper visual fields in humans is analyzed in relation to the origins of the primate visual system. Processing differences between the vertical hemifields are related to the distinction between near (peripersonal) and far (extrapersonal) space, which are biased toward the lower and upper visual fields, respectively. Nonlinear/global processing is required in the lower visual field in order to pergeive the optically degraded and diplopic images in near vision, whereas objects in far vision are searched for and recognized primarily using linear/local perceptual mechanisms. The functional differences between near and far visual space are correlated with their disproportionate representations in the dorsal and ventral divisions of visual association cortex, respectively, and in the magnocellular and parvocellular pathways that project to them. Advances in far visual capabilities and forelimb manipulatory skills may have led to a significant enhancement of these functional specializations.

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Altitudinal Hemianopia*

Cited by 24 publications

References 3 publications

Horizontal Hemianopias

Horizontal Hemianopias

Bilaterale untere Hemianopsie

Functional specialization in the lower and upper visual fields in humans: Its ecological origins and neurophysiological implications

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