Neuropsychology of left-handedness

書誌事項

Neuropsychology of left-handedness

edited by Jeannine Herron

(Perspectives in neurolinguistics, neuropsychology, and psycholinguistics)

Academic Press, c1980

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注記

Includes bibliographies and index

内容説明・目次

内容説明

Neuropsychology of Left-Handedness focuses on the neurological imperative and unique brain organization of left-handers. This book is organized into two parts. Part I analyzes ideas about the origins of left-handedness, such as possible genetic mechanisms, manner in which asymmetries may occur during the first cell cleavages following fertilization, handedness of twins, and possibility that some left-handedness may be due to environmental or even pathological influences. The second part is devoted to a variety of investigations of asymmetric hemisphere specialization in right- and left-handers. The different groups of left-handers, which includes male and female, strong left-preferrers and ambidexters, familial and non-familial lefthanders, and those who prefer an "inverted" position for writing as opposed to a "non-inverted" position, are also identified. This publication is a good reference for medical practitioners and specialists interested in the neuropsychology of left-handedness.

目次

List of Contributors Preface I Wence Sinistrality? 1 Left-Handedness: Early Theories, Facts, and Fancies Introduction How Many Left-Handers? Early Theories Heredity Ambidextral Culture Left-Handedness as Pathological Studies of Animals Conclusion References 2 Neuroanatomical Asymmetry in Left-Handers: A Review and Implications for Functional Asymmetry Introduction Hemisphere Functional Asymmetry Neuroanatomical Asymmetry Patterns of Cognitive Skills and Neuroanatomical Asymmetry Gender and Neuroanatomical Asymmetry Summary References 3 The Sinistral Blastocyst: An Embryologic Perspective on the Development of Brain-Function Asymmetries 4 Left-Handedness in Twins: Implications for the Mechanisms Underlying Cerebral Asymmetry of Function Introduction The Incidence of Sinistrality among Twins Factors Responsible for Elevating the Incidence of Sinistrality among Twins The Relationship of Handedness, Cerebral Organization, and Cognitive Abilities in Twins Conclusions References 5 Is Left-Handedness Genetically Determined? Introduction Annett/s Model A Nongenetic Approach Conclusions References 6 A Model for the Ontogeny of Cerebral Organization in Non-Right-Handers Introduction Hypotheses about the Brain Basis of Cerebral Specialization Brain Stem Activity and Cerebral Asymmetry The Selective Activation Model of Cerebral Lateralization References II Cerebral Variation: The Most Consistent Sinistral Atribute 7 Incidence of Aphasia in Lefl-Handers: A Test of Some Hypothetical Models of Cerebral Speech Organization Introduction Method Results Discussion References 8 Individual Differences in Psychoneurological Organization Introduction Origins of Lateral Asymmetry Behavioral Indices of Cerebral Laterality Sex-Related Differences in Cerebral Organization The Population Variance in Hemispheric Lateralization Predictions regarding the Cognitive Covariates of Cerebral Organization Summary References 9 Handedness and Individual Differences in Hemispheric Activation Introduction Hemispheric Activation: The Concept and Its Operationalization The Effect of Handedness, Sex, and Eye Dominance on Hemispheric Activation Summary References 10 Two Hands, Two Brains, Two Sexes Introduction Right versus Left-Handed Differences Left-Handed versus "Ambi-Handed" Differences Inverted versus Noninverted Hand Posture Differences References III Sinistral Abilities 11 Handedness and Memory for Tonal Pitch Introduction Experiment 1 Experiment 2 Discussion References 12 Handedness in Artists Introduction Method Results Discussion References 13 Cognitive Deficit and Left-Handedness: A Cautionary Note Method Results Discussion References 14 Age-Related Changes in Cognitive Abilities and Hemispheric Specialization Introduction Hemispheric Development Cognitive Abilities Implications of Cognitive Differences Age-Associated Changes in Cognitive Abilities and Hemispheric Specialization References 15 Which Hand Is the "Eye" of the Blind?-A New Look at an Old Question Introduction Hand Asymmetries in Braille Reading: Early Studies Braille Reading and Right-Hemisphere Functions Experiment 1: Blind Subjects Hand Asymmetries in Sighted Subjects Experiment 2: Sighted Subjects, Massed Left-Right Trials Experiment 3: Sighted Subjects, Alternating Left-Right Trials Experiment 4: Left-Handers, Massed Left-Right Trials Experiment 5: Left-Handers: Alternating Left-Right Trials Summary and Conclusions References 16 Tactile Learning, Handedness, and Reading Disability Introduction Mechanical Tactile Stimulation Experiment 1: Interhemispheric Transfer from the Chest Area to the Hands Experiment 2: Interhemispheric Transfer from the Nonpreferred to the Preferred Hand Visual Memory Discussion Summary Acknowledgments References Subject Index

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