The role of movement in the origin and maintenance of visual perception

1963 ◽  
Author(s):  
Richard Held
Keyword(s):  
Visual Perception

The Psychologist-Educator Views the Relationship of Vision to Reading and Related Learning Disabilities

1981 ◽  
Vol 14 (10) ◽  
pp. 565-567 ◽  
Author(s):  
Jules C. Abrams
Keyword(s):  
Learning Disabilities ◽  
Visual Field ◽  
Visual Perception ◽  
Learning Disability ◽  
Visual Defects ◽  
Considerable Controversy ◽  
Visual Problems ◽  
Relationship Of ◽  
The Relationship

The role of visual problems in learning disability has been a source of considerable controversy for many years. One major issue in the continuing argument is the frequent confusion of labels and concepts in the visual field. It is important to view vision as a psychophysiologic mechanism and to differentiate it from a mechanistic orientation emphasizing the eyes. Most visual problems related to learning disability represent a breakdown in the ability of the eyes to function in an harmonious fashion, that is, some interference in binocular function. While visual defects should not be confused with defects in visual perception, the identification and treatment of visual problems is an important element in the diagnosis and remediation of learning disabilities.

scholarly journals A Role of Amygdala in Visual Perception and Cognition in Macaque Monkeys (Macaca fuscata and Macaca mulatta)

1990 ◽  
Vol 161 (Supplement) ◽  
pp. 95-120 ◽  
Author(s):  
EIICHI IWAI ◽  
MASAO YUKIE ◽  
JOJI WATANABE ◽  
KAZUO HIKOSAKA ◽  
HIDEO SUYAMA ◽  
...  
Keyword(s):  
Visual Perception ◽  
Macaca Mulatta ◽  
Macaca Fuscata ◽  
Macaque Monkeys

scholarly journals Psychophysical and fMRI studies of the role of prior knowledge in visual perception

2010 ◽  
Vol 6 (6) ◽  
pp. 677-677
Author(s):  
J. Hegde ◽  
S. K. Thompson ◽  
D. Kersten
Keyword(s):  
Visual Perception ◽  
Prior Knowledge

scholarly journals Binding Mechanisms in Visual Perception and Their Link With Neural Oscillations: A Review of Evidence From tACS

2021 ◽  
Vol 12 ◽  
Author(s):  
Andrea Ghiani ◽  
Marcello Maniglia ◽  
Luca Battaglini ◽  
David Melcher ◽  
Luca Ronconi
Keyword(s):  
Visual Perception ◽  
Feature Binding ◽  
Causal Role ◽  
Oscillatory Activity ◽  
Dependent Manner ◽  
Brain Oscillations ◽  
Temporal Binding ◽  
Neurophysiological Studies ◽  
Binding Mechanisms

Neurophysiological studies in humans employing magneto- (MEG) and electro- (EEG) encephalography increasingly suggest that oscillatory rhythmic activity of the brain may be a core mechanism for binding sensory information across space, time, and object features to generate a unified perceptual representation. To distinguish whether oscillatory activity is causally related to binding processes or whether, on the contrary, it is a mere epiphenomenon, one possibility is to employ neuromodulatory techniques such as transcranial alternating current stimulation (tACS). tACS has seen a rising interest due to its ability to modulate brain oscillations in a frequency-dependent manner. In the present review, we critically summarize current tACS evidence for a causal role of oscillatory activity in spatial, temporal, and feature binding in the context of visual perception. For temporal binding, the emerging picture supports a causal link with the power and the frequency of occipital alpha rhythms (8–12 Hz); however, there is no consistent evidence on the causal role of the phase of occipital tACS. For feature binding, the only study available showed a modulation by occipital alpha tACS. The majority of studies that successfully modulated oscillatory activity and behavioral performance in spatial binding targeted parietal areas, with the main rhythms causally linked being the theta (~7 Hz) and beta (~18 Hz) frequency bands. On the other hand, spatio-temporal binding has been directly modulated by parieto-occipital gamma (~40–60 Hz) and alpha (10 Hz) tACS, suggesting a potential role of cross-frequency coupling when binding across space and time. Nonetheless, negative or partial results have also been observed, suggesting methodological limitations that should be addressed in future research. Overall, the emerging picture seems to support a causal role of brain oscillations in binding processes and, consequently, a certain degree of plasticity for shaping binding mechanisms in visual perception, which, if proved to have long lasting effects, can find applications in different clinical populations.

Blindsight and the Role of the Phenomenal Qualities of Visual Perceptions

1998 ◽  
pp. 205-209
Author(s):  
Ralph Schumacher
Keyword(s):  
Visual Perception ◽  
Visual Information ◽  
Visual Experience ◽  
Sufficient Condition ◽  
Broad Concept ◽  
Essential Properties

The aim of this paper is to defend a broad concept of visual perception, according to which it is a sufficient condition for visual perception that subjects receive visual information in a way which enables them to give reliably correct answers about the objects presented to them. According to this view, blindsight, non-epistemic seeing, and conscious visual experience count as proper types of visual perception. This leads to two consequences concerning the role of the phenomenal qualities of visual experiences. First, phenomenal qualities are not necessary in order to see something, because in the case of blindsight, subjects can see objects without experiences phenomenal qualities. Second, they cannot be intentional properties, since they are not essential properties of visual experiences, and because the content of visual experiences cannot be constituted by contingent properties.

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