- •CONTENTS
- •PREFACE
- •ABSTRACT
- •1. INTRODUCTION
- •2.1. Background
- •2.1.1. Anatomical Asymmetry of Brain
- •2.1.2. Hemispheric Lateralization of Cerebral Functions
- •2.1.3. Hemispheric Asymmetry Using Reaction Time
- •2.1.4. Reaction Time Task Based Upon Double Crossed Projections
- •2.2.1. Purpose
- •2.2.2. Methods
- •2.2.2.1. Participants
- •2.2.2.2. Apparatus
- •2.2.2.3. Procedures
- •2.2.3. Results
- •2.2.4.Discussion
- •2.3.1. Purpose
- •2.3.2. Materials and Methods
- •2.3.2.1. Participants
- •2.3.2.2. Apparatus
- •2.3.2.3. Procedures
- •2.3.3. Results
- •2.3.4. Discussion
- •2.4.1. Purpose
- •2.4.2. Methods
- •2.4.2.1. Participants
- •2.4.2.2. Apparatus and Procedures
- •2.4.3. Results
- •2.4.4. Discussion
- •2.5.1. Purpose
- •2.5.2. Methods
- •2.5.2.1. Participants
- •2.5.2.2. Apparatus
- •2.5.2.3. Procedures
- •2.5.3. Results
- •2.5.4. Discussion
- •2.5.4.1. Effect of Luminance on Hemispheric Asymmetry
- •2.5.4.2. Effect of Contrast on Hemispheric Asymmetry
- •2.5.4.3. Effect of Practice on Visual Field Difference
- •2.5.4.4. Effect of Subject Number Size
- •2.6.1. Purpose
- •2.6.2. Methods
- •2.6.2.1. Participants
- •2.6.2.2. Apparatus
- •2.6.2.3. Procedures
- •2.6.3. Results
- •2.6.4. Discussion
- •2.7.1. Purpose
- •2.7.2. Methods
- •2.7.2.1. Participants
- •2.7.2.2. Apparatus
- •2.7.2.3. Procedures
- •2.7.3. Results
- •2.7.4. Discussion
- •3.1. Background
- •3.1.1. Startle Response
- •3.1.2. Prepulse Inhibition
- •3.2. Purpose
- •3.3. Methods
- •3.3.1. Participants
- •3.3.2. Apparatus
- •3.3.3. Prepulse
- •3.3.4. Startle Stimulus
- •3.3.5. Recordings Of Blinking
- •3.3.6. Procedures
- •3.4. Results
- •3.4.1. Measurements of the Response Amplitude
- •3.4.2. Typical Example of PPI of the Blink Response
- •3.4.3. Responses to Chromatic and Achromatic Prepulses
- •3.5. Discussions
- •3.5.1. Three Types of Blink Reflexes
- •3.5.2. Eyelid and Eye Movements During Blinking
- •3.5.3. Neural Circuit for PPI
- •3.5.4. Effect of Change in Luminance
- •3.5.5. Cortical Contributions to PPI
- •4.1. Two Visual Pathways
- •4.2. Two Visual Streams
- •4.3. Three Hierarchies of the Brain
- •4.4. Limbic System
- •4.5. Dual Processing Circuits of Visual Inputs
- •4.7. Blindsight and Extrageniculate Visual Pathway
- •4.8. Amygdala and the Affective Disorders
- •4.9. Amygdala Regulates the Prefrontal Cortical Activity
- •4.10. Multimodal Processing for Object Recognition
- •5. CONCLUSION
- •ACKNOWLEDGMENTS
- •REFERENCES
- •ABSTRACT
- •INTRODUCTION
- •1.1. Newton on the Properties of Light and Color
- •1.2. Interaction of the Color-Sensing Elements of the Eye
- •1.4. The Mechanisms of Mutual Influence of Sense Organs
- •Ephaptic Connections
- •Irradiation Effect. The Rule of Leveling and Exaggeration
- •Connections between Centers
- •The Role of the Vegetative Nervous System
- •Sensor Conditioned Reflexes
- •The Changing of Physiological Readiness of the Organism to Perception
- •1.1. The History of the Principle of the Being and Thinking Identity
- •Parmenides
- •Plato
- •Aristotle
- •Descartes
- •Necessity
- •Sufficiency
- •Leibnitz
- •Wittgenstein
- •Modern Analytic Tradition
- •2) Sufficiency
- •1) Necessity
- •2.2. Critical Arguments against Experience
- •2) Historical Development of the Scientific Fact (L. Fleck)
- •2.3. The Myths about Experience: Passivity and Discreteness of Perception
- •The Thesis of Underdeterminacy as a Corollary of Perception Activity
- •The Principle of Empirical Holism
- •3.2. The Color and Cognition
- •Example of Presetting Influence on the Possibility of Observation
- •CONCLUSION
- •REFERENCES
- •ABSTRACT
- •What Is Colour?
- •Biological Colourations in Living Organisms
- •Pigment Based Colouration
- •Structure Based Colourations
- •Bioluminescence: Colourations from Light
- •Functional Anatomy of Colour Vision across the Species
- •Colour Vision in Non-Humans
- •Colour and the Human Visual System
- •Deceptive Signalling or Camouflage
- •Advertising and Mate Choice
- •Repulsive Signalling
- •Additional Functions
- •Colour Perception in Man: Context Effects, Culture and Colour Symbolism
- •Context Effects in Colour Perception
- •Colour Perception and Cultural Differences
- •Colour Symbolism and Emotions
- •REFERENCES
- •INDIVIDUAL DIFFERENCES IN COLOUR VISION
- •ABSTRACT
- •1. INTRODUCTION
- •2. COMPARATIVE STUDY OF THE FUNDAMENTALS
- •3. DIFFERENCES BETWEEN MEN AND WOMEN
- •A. STIMULUS GENERATING SYSTEM
- •B. PSYCHOPHYSICAL TEST
- •C. SAMPLE
- •4. DIFFERENCES IN THE MODEL OF COLOUR VISION
- •4. CONCLUSION
- •ACKNOWLEDGMENTS
- •REFERENCES
- •ABSTRACT
- •1. INTRODUCTION
- •2.1. Evidences For and Against the Segregation Hypothesis
- •2.1.1. Early Visual Areas
- •2.1.2. Higher Visual Areas
- •2.2. Evidences For and Against a Specialized Color Centre in the Primate
- •CONCLUSION
- •ACKNOWLEDGMENTS
- •REFERENCES
- •ABSTRACT
- •3. THE PHENOMENAL EVIDENCES FOR COLOUR COMPOSITION
- •4. MIXING WATER AND MIXING COLOURS
- •REFERENCES
- •1. INTRODUCTION
- •2.2. Variational Approaches
- •2.3. Statistics-Based Anisotropic Diffusion
- •2.4. Color Image Denoising and HSI Space
- •2.5. Gradient Vector Flow Field
- •3. COLOR PHOTO DENOISING VIA HSI DIFFUSION
- •3.1. Intensity Diffusion
- •3.2. Hue Diffusion
- •3.3. Saturation Diffusion
- •4. EXPERIMENTS
- •5. CONCLUSIONS
- •REFERENCE
- •REFERENCES
- •ABSTRACT
- •INTRODUCTION
- •CAROTENOIDS AS COLORANTS OF SALMONOID FLESH
- •SEA URCHIN AQUACULTURE
- •Effect of a Diet on Roe Color
- •Relationship between Roe Color and Carotenoid Content
- •REFERENCES
- •ABSTRACT
- •INTRODUCTION
- •History & Current Ramifications of Colorism/Skin Color Bias
- •Colorism in the Workplace
- •CONCLUSION
- •REFERENCES
- •ABSTRACT
- •ACKNOWLEDGMENT
- •REFERENCES
- •ABSTRACT
- •ACKNOWLEDGMENTS
- •REFERENCES
- •INDEX
In: Color Perception: Physiology, Processes and Analysis |
ISBN: 978-1-60876-077-0 |
|
Editors: D. Skusevich, P. Matikas, pp. 1-50 |
© 2010 Nova Science Publishers, Inc. |
|
Chapter 1
CORTICAL AND SUBCORTICAL PROCESSING
OF COLOR: A DUAL PROCESSING
MODEL OF VISUAL INPUTS
Hitoshi Sasaki
Department of Physiology and Biosignaling, Osaka University
Graduate School of Medicine, Yamadaoka, Japan
ABSTRACT
In order to investigate a possible role of visual processing in regulation of adaptive behaviors, two behavioral experiments using color stimulus were performed. In the first experiment, hemispheric asymmetry of color processing was investigated by measuring reaction time to a stimulus presented either in the left or the right visual field responded by ipsilateral hand. The simple reaction time was shorter to a color stimulus presented in the right hemisphere in the right-handed participants, while no hemispheric asymmetry was found in color discrimination reaction time without verbal cues. In the second experiment, a modulatory effect of color on sensory-motor interaction was investigated using a prepulse modulation task. Amplitude of a startle eyeblink response elicited by an air-puff to the cornea was significantly inhibited by a shortly (100 ms) preceding color prepulse. A different amount of the inhibition was induced by different color prepulses. Yellow was more effective as compared to a blue prepulse. Although the exact neuronal pathways underlying the prepulse inhibition of the corneal blink response is not determined, a top-down pathway from the cortex to the brainstem nuclei via the amygdala seems to be involved in the sensory-motor interaction. The descending pathway seems to play a role in modulation of the startle responses. From these findings combined with other studies, a dual processing hypothesis of visual inputs will be proposed, where physical features of the stimulus are processed in the cerebral cortex with consciousness, while the psychological and biological meanings are processed mainly in the limbic system without consciousness. Traditionally, it was thought that these two processes are in series, while in the present model these processes are in parallel, in addition to the serial processing. Visual inputs are conveyed to the limbic system via the indirect cortical and the direct subcortical pathways. The cortical pathway further divided into two routs; one is from the inferotemporal cortex and the other is from the posterior parietal association cortex through the pulvinar nucleus of the thalamus.