Full Description
The demonstration of the basic brain mechanism through studying the partially commissure-sectioned case appears to be a most prom ising enterprise. The work with animals of HAMILTON and others in elucidating psychological brain process heretofore not imagined are mere indications of what the potential seems to be. Study of the partially disconnected patient seems equally revealing and productive in showing how many high level cognitive activities are managed in the cerebral flow of information. With respect to the issue of localization of function, it would seem clear that those cerebral areas clearly involved in the im mediate processing of raw sensory information can be selectively and specifically isolated and disconnected. In other words, the informational products of the long axonal type cells of Golgi, which MARCUS JACOBSON claims are the brain cells under strict genetic control, can be isolated, whereas the products of more complex and integrative mental activities which are managed by the more mutable Golgi type II cells do not seem to be so spec ifically disposed. Thus, these data suggest the lateralized spe cialities of the various left and right brain areas can make their contribution to the cerebral activities of the opposite hemisphere through almost any callosal area regardless of its size and loca tion. Indeed, this interpretation suggests to me that the long standing issue of the extent of localization could be better un derstood by considering the dichotomy in genetic specification as offered by HIRSCH and JACOBSON (1974).
Contents
I. Motor Functions.- Critical Remarks on "Lokalisationslehre".- Cortical Motor Map of Macaca Mulatta after Chronic Section of the Medullary Pyramid.- Pyramidal and Parapyramidal Motor Systems in Man.- Contra- and Ipsilateral Motor and Sensory Representation in the Cerebral Cortex of Monkey and Man.- The Localization of Hemispheric Mechanisms of Visually Directed Reaching and Grasping.- Occipito-Frontal Connections, a Possible Sensory-Motor Link for Visually Guided Hand and Finger Movements.- The Central Organization of Adversive Movements as the Main Direction of Locomotion on Land.- Analysis of the Sequential Motor Events in Oral Apraxia.- II. Interhemispheric Connection.- Bilateral Motor Interaction: Perceptual-Motor Performance of Partial and Complete "Split-Brain" Patients.- Partial Commissurotomy and Cerebral Localization of Function.- Visual Evoked Responses in Commissurotomy Patients.- Transcallosal Potentials in the Corpus-Callosum Cat.- III. Social Behavior.- Neurology of Social Behavior and Affect in Primates: A Study of Prefrontal and Anterior Temporal Cortex.- Emotional Areas of the Human Brain and its Programmed Stimulation for Therapeutic Purposes.- The Localization of Sex in the Brain.- IV. Plasticity and Dominance.- Plastic Brain Mechanisms in Sensory Substitution.- Some Problems of Cortical Organization in the Light of Ideas of the Classical "Hirnpathologie" and of Modern Neurophysiology. An Essay.- V. Cerebral Speech Mechanisms.- Vocal Behavior and its "Localization" as a Prerequisite for Speech.- Clinical and Surgical Studies of the Cerebral Speech Areas in Man.- Excision of Broca's Area without Persistent Aphasia.- Neurolinguistic Comments on the Alexias.- Traumatic Dyslexia: Localization and Linguistics.- VI. General Discussion.-Localization of Normal Function.- Cerebral Dominance.- Plasticity of the Nervous System.- The Concept of Diaschisis.
