By Prof. Dr. Heiko Braak (auth.)

ISBN-10: 3642815227

ISBN-13: 9783642815225

ISBN-10: 3642815243

ISBN-13: 9783642815249

This is a well timed opus. so much folks now are too younger to recollect the disagreeable ring of a polemic among those that produced "hair-splitting" parcellations of the cortex (to paraphrase considered one of O. Vogt's favorite expressions) and people who observed the cortex as a homogeneous matrix sus taining the reverberations of EEG waves (to paraphrase Bailey and von Bonin). One camp accused the opposite of manufacturing bogus arrangements with a paint brush, and the opposite direction round the accusation used to be that of bad eye-sight. Artefacts of assorted varieties have been invoked to provide an explanation for the opponent's mistakes, starting from perceptual results (Mach bands crispening the areal borders) to bad fixation supposedly as a result of perfusion too quickly (!) after demise. i've got heard so much of this at once from the protagonists' mouths. The polemic was once no longer resolved however it has mellowed with age and eventually light out. i used to be relieved to work out that Professor Braak elegantly avoids dis cussion of an extrememist guideline, that of "hair-sharp" areal barriers, which makes little experience in developmental biology and is inappropriate to neurophysiology. It used to be truly dangerous to cortical neuroanatomy, considering that its negation ended in the concept that structurally particular components will not be in any respect existent. but, no one may deny the truth of 5 hands on one hand no matter if the unique task of each epidermal telephone to 1 finger or one other is clearly impossible.

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**Additional info for Architectonics of the Human Telencephalic Cortex**

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The adjoining isocortex may still show for a variable distance some features which can be encountered only in these borderline zones, such as a band-like appearance of the ganglionic layer in the Nissl preparation or only a small number of second-layer pigment-laden stellate cells in the pigment preparation. This marginal zone is designated the proisocortex. Isocortical areas generally display an euradiate characteristic whereas proisocortical fields may also show the infraradiate or supraradiate type.

As an example, the large multipolar nerve cells of the nucleus alaris in the dorsal glossopharyngeus and vagus area exhibit similar dendritic pigment spindles (H. Braak, I 972c). Within the telencephalic cortex the subiculum is the only region which is distinguished by this feature. It can therefore easily be outlined in pigment preparations. The reason for the development of dendritic pigment is unknown at present. The internal pyramidal layer is dominated by medium-sized pyramids. As compared to the external ones the longer axes of their cell bodies are less regularly oriented.

The pyramidal layer (III) is richly stocked with well-pigmented pyramids. Both the upper and the lower border of the pyramidal layer (PilI) are sharply drawn in pigment preparations. The external tenia is a pallid stripe filled with nerve cells of roughly the same size and shape as those Fig. 18. Left Lamination of the magnoganglionic anterogenual field (Nissl preparation, 15 11m). Right Frontal sections successively cut from the same block of tissue for comparison of the architectonic features of the magnoganglionic anterogenual field as revealed by pigment, myelin, and Nissl preparations.

### Architectonics of the Human Telencephalic Cortex by Prof. Dr. Heiko Braak (auth.)

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