Hemispheric Asymmetry

Preface
1. Introduction
- Five Recurring Themes
- Learning about Behavioral Asymmetries in Humans
- The Consequences of Unilateral Brain Injury
- Split-Brain Patients and the Positive Competence of Each Hemisphere
- Perceptual Asymmetries in Neurologically Intact Individuals
- Response Asymmetries in Neurologically Intact Individuals
- Measures of Localized Brain Activity
- The Plan of the Book
- Summary and Conclusions
2. Behavioral Asymmetries in Humans
- A Review of Behavioral Asymmetries
- Handedness and the Control of Motor Activities
- Language
- Visuospatial Processing
- Emotion
- The Quest for a Fundamental Dichotomy
  - A Sampling of Suggested Dichotomies
  - Multitask Studies and the Quest for a Fundamental Dichotomy
- Summary and Conclusions
3. Hemispheric Asymmetry and Components of Perception, Cognition, and Action
- Language
- Vision
- Global versus Local Processing
- Low versus High Visual-Spatial Frequency
- Coordinate versus Categorical Spatial Relations
- Relationships among Components of Vision
- Imagery
- Attention
- Components of Visual Orienting
- Regulation of Alertness
- Hemisphere-Specific Priming and Interference
- Summary and Conclusions
4. Biological Asymmetries in the Human Brain
- Anatomical Asymmetries
- Pharmacological and Chemical Asymmetries
- Callosal Connectivity
- Biology and Behavior
- Summary and Conclusions
5. Behavioral and Brain Asymmetries in Nonhuman Species
- Motor Performance
  - Primates
  - Rodents
  - Other Species
- The Production and Perception of Vocalizations
  - Primates
  - Rodents
  - Birds
  - Other Species
- Visuospatial Processes
  - Primates
  - Rodents
  - Birds
  - Dolphins
- Motivation and Emotion
  - Rats
  - Chicks
- Additional Evidence of Biological Asymmetry
- Summary and Conclusions
6. Varieties of Interhemispheric Interaction
- Cooperation between the Hemispheres
- The Need for Cooperation
- The Corpus Callosum
- Subcortical Structures
- Benefits and Costs of Interhemispheric Cooperation
- Task Difficulty
- Practice
- Mutually Exclusive Processes
- Hemispheric Ability, Hemispheric Dominance, and Metacontrol
- Studies of Split-Brain Patients
- Studies of Neurologically Intact Individuals
- Determinants of Metacontrol
- Summary and Conclusions
7. Individual Differences
- Dimensions of Individual Variation
  - Direction of Hemispheric Asymmetry
  - Magnitude of Hemispheric Asymmetry
  - Asymmetric Arousal of the Hemispheres
- Complementarity of Asymmetries
- Interhemispheric Communication
- Handedness
- Sex
- Intellectual Abilities
  - Intellectual Precocity
  - Dyslexia
  - Psychopathology
  - Hemisphericity
- Summary and Conclusions
8. Hemispheric Asymmetry across the Life Span
- Does Hemispheric Asymmetry Develop?
- Prenatal Asymmetries
  - The Rate of Maturation of the Two Hemispheres
  - Cranio-Facial Development
  - Fetal Position
  - “Snowball” Mechanisms
- Hemispheric Asymmetry from Birth through Young Adulthood
  - Handedness and the Control of Motor Activities
  - Language
  - Visuospatial Processing
  - Emotion
  - Biological Asymmetry
- Hemispheric Asymmetry in Old Age
  - Do the Hemispheres Age Differently?
  - Aging and the Dimensions of Individual Variation
- Summary and Conclusions
9. The Evolution of Hemispheric Asymmetry
- Symmetry versus Asymmetry
- Snowball Effects
- Continuity across Species?
- From Monkeys to Humans
  - The Evolution of Primates
  - The Emergence of Hominids and Humans
- Milestones in Hominid Evolution
  - Walking Upright
  - Tool Manufacture and Use
  - Language
  - Prolonged Immaturity
- Summary and Conclusions
10. Epilogue
- A. The Five Themes Revisited
- B. Toward a Model of Hemispheric Asymmetry
- C. Concluding Comments
Bibliography
Index of Authors Cited
General Index

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