By Prof. Dr. Heiko Braak (auth.)
This is a well timed opus. such a lot people now are too younger to recollect the disagreeable ring of a polemic among those that produced "hair-splitting" parcellations of the cortex (to paraphrase certainly one of O. Vogt's favorite expressions) and those that 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 was once that of bad eye-sight. Artefacts of assorted kinds have been invoked to give an explanation for the opponent's mistakes, starting from perceptual results (Mach bands crispening the areal borders) to negative fixation supposedly because of perfusion too quickly (!) after dying. i've got heard so much of this at once from the protagonists' mouths. The polemic used to be no longer resolved however it has mellowed with age and eventually pale out. i used to be relieved to work out that Professor Braak elegantly avoids dis cussion of an extrememist guiding principle, that of "hair-sharp" areal barriers, which makes little feel in developmental biology and is beside the point to neurophysiology. It used to be truly dangerous to cortical neuroanatomy, considering its negation resulted in the concept that structurally targeted components aren't in any respect existent. but, not anyone could deny the truth of 5 palms on one hand whether the certain project of each epidermal telephone to 1 finger or one other is clearly impossible.
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Additional resources for Architectonics of the Human Telencephalic Cortex
The deep layers again are formed of characteristic outer and inner subicular pyramidal cells. Fig. 6. Subiculum of man close to its medial margin. Upper half Nissl preparation (l5Ilm). Lower half Pigment preparation (200 Ilm). The extremely broad molecular layer contains some clouds of the parvopyramidal presubicular layer (pr). The cellular laminae of the subiculum can be divided into an external and an internal pyramidal layer (pe and pi). 2 The Presubiculum The presubiculum is a small and elongated region which borders laterally on the subiculum and medially on either the entorhinal region or the temporal and occipital proisocortex.
CA 1 ' . ',.. \1' \. • ,....... - CA2 1mm . 5. Legend see p. 26 Fig 28 The Allocortex nucleus. The perikaryal cytoplasm is confined to a narrow rim which is poor in basophilic material and contains only a few feebly tinged pigment granules. A few dendrites emerge from the apical pole of the pear-shaped or ovoid cell bodies. , 1975; Lindsay and Scheibel, 1976). The dendrites are richly decorated with spiny appendages.
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.
Architectonics of the Human Telencephalic Cortex by Prof. Dr. Heiko Braak (auth.)