Neuroanatomical Research Techniques

Neuroanatomical Research Techniques discusses developments in major neuroanatomical research techniques. The book is organized into four parts. Part I deals generally with the preparation and study of brain tissue. It includes a chapter on the microscope, discussing optical magnification, limitations of microscopy, and optical contrasting methods. Other chapters summarize basic techniques for tissue preparation and sectioning; present guidelines for a number of standard, but essential, staining procedures; and present sophisticated and contemporary computer techniques that are proving to be invaluable as neuroanatomy evolves from a qualitative to a quantitative discipline. Part II deals with techniques often used for the study of normal tissue. These include the Golgi method, fluorescence histochemistry, techniques for staining single neurons, and the use of the electron microscope. Part III presents techniques for studying intrinsic connections of the nervous system. These include techniques for silver impregnation of degenerating fibers; autoradiographic technique for studying axonal projections; and somatopetal movement of horseradish peroxidase as a tool for studying connections and neuron morphology. Part IV discusses the interpretation of results from neuroanatomical research techniques and presents examples of the applications of neuroanatomical methods to major problems in physiological psychology.

"Anatomy is the mother of physiology" - this statement was used to characterize the evolution of physiology from anato my as an independent science in the late nineteenth century. It had particular truth for neurophysiology, which started as functional neuroanatomy based on the observation of changes in behaviour after lesions of the nervous system both in ex perimental animals and in human patients. Today, anatomy may again be considered the mother of physiology; however, the meaning of this statement is rather different from that 100 years ago: The modem mother provides a dwelling for an increasing number of children endowed with new functional capabilities. This book provides a good illustration of such se mantic metamorphosis in the case of neuroanatomy. After a long period of little progress in either macroscopic neuroanatomy or neurohistology, during which the heritage of Cajal, Golgi, and others was developed and refined to yield a functional concept of the nervous system, the past two de cades have seen tremendous progress in methods applicable to the analysis of the nervous system. The new era was heralded by the introduction of the electron microscope to investigate the nervous system. This book is an impressive witness to the more recent developments.

As a source of information on neuroanatomical research methods this Volume is not without precedent. In 1957, at the initiative of Dr. W. F. Windle, a conference was held at the National Institutes of Health, the proceedings of which, edited by Dr. Windle and published by C. C. Thomas under the title "New Research Tech niques of Neuroanatomy", rapidly became something like a standard reference in the field of Neuromorphology. The present editors were emboldened to seek support for a second expose of contemporary research methods in Neuroanatomy by the success of this earlier publication, as well as by the consideration that the years elapsed since its appearance have been, perhaps, more productive of new research methods and strategies in Neuroanatomy than were any dozen consecutive years since the golden decades of the 1870's and 1880's. The decision, which methods to include in this conference, has been a difficult one. For reasons of space alone it would have been impossible to do equal justice to techniques approaching the brain as a neuronal system, the brain as a tissue, or the neuron as a cell. As a brief inspection of the contents of this volume will show, the weight of choice fell upon the first of these alternatives. The reader will find, further more, that not all of the book is devoted to new methods in the strict sense.

The first two editions of this title had a tremendous impact in neuroscience. Between the Second edition in 1989 and today, there has been an explosion of information in the field, including advances in molecular techniques, such as genomics and proteomics, which have become increasing important in neuroscience. A renaissance in fluorescence has occurred, driven by the development of new probes, new microscopes, live imagers, and computer processing. The introduction of new markers has enormously stimulated the field, moving it from tissue culture to neurophysiology to functional MRI techniques.

Stereology is a valuable tool for scientists, allowing them to make 3-D reconstructions of the brain from 2-D data. This is a 'cookbook' of stereological methods written especially for neuroscientists, with clear advice about when and when not to use stereology

Most neurobiological research is performed on vertebrates, and it is only natural that most texts describing neuroanatomical methods refer almost exclusively to this Phylum. Nevertheless, in recent years insects have been studied intensively and are becoming even more popular in some areas of research. They have advantages over vertebrates with respect to studying genetics of neuronal development and with respect to studying many aspects of integration by uniquely identifiable nerve cells. Insect central nervous system is characterized by its compactness and the rather large number of nerve cells in a structure so small. But despite their size, parts of the insect eNS bear structural comparisons with parts of vertebrate eNS. This applies particularly to the organization of the thoracic ganglia (and spinal cord), to the insect and vertebrate visual sys tems and, possibly, to parts of the olfactory neuropils. The neurons that make up these areas in insects are often large enough to be impaled by microelectrodes and can be injected with dyes. Added to advantages of using a small eNS, into which the sensory periphery is precisely mapped, are the many aspects of insect behaviour whose components can be quan titized and which may find both structural and functional correlates within clearly defined regions of neuropil. Together, these various features make the insect eNS a rewarding object for study. This volume is the first of two that describe both classic and recent methods for neuroanatomical research on insect eNS.

This new edition presents readers with the latest information on neuroscience. This book explores the advances in molecular techniques, genomics and proteomics and the progress in fluorescence.