By Olaus Johan Murie
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Additional resources for A Field Guide to Animal Tracks
The position of this peak was also unaltered by the presence of urea or by re-focusing. ChAc AND ACh 12 20 SYNTHESIS 28 19 36 Fig. 5. Isoelectric focusing of A, ChAc from pigeon brain; and B, ChAc from guinea-pig brain in pH gradient 3-10. ) pH. In contrast to the enzymes from pigeon and guinea-pig brains the enzymes from rat and cat brains were distributed over a rather broader pH range. 3 in a pH 3-10 gradient (Fig. 6a). The identity of two separate peaks was established by isolating the most active fractions in the two peaks and re-focusing them in two separate pH 6-9 gradients (Fig.
Correspondingly, fine dissection of the area around the pyramidal cells showed a reduced activity at the level of the cell bodies (Fig. 4). The zones receiving commissural fibres, - * The hippocampal region comprises area dentata, hippocampus, subiculum, presubiculum, area retrosplenialis, parasubiculum and area entorhinalis. In this paper only the two former parts are dealt with. For nomenclature see Blackstad (1956). TRANSMITTERS IN HIPPOCAMPUS 43 Fig. 2. Schematic drawing of hippocampus and area dentata of rat brain as seen in a horizontal section stained for AChE.
It was shown with 2P0,3- as a precursor that phospholipids of nervous tissue, preferentially phosphatidic acid and phosphatidylinositol but also other phospholipids, particularly phosphatidylethanolamine and to some extent phosphatidylcholine, increase their turnover rate upon electrical stimulation. , 1963); ganglia in situ were similarly affected (Larrabee, 1968). Potassium ion stimulation (Heilbronn and Widlund, 1970), the addition of acetylcholine (ACh) (Hokin and Hokin, 1955, 1958; Durell and Sodd, 1964, 1966; Heilbronn and Widlund, 1970) or ACh-releasing substances, such as atropine and certain psychotomimetic glycollates (Abood and Biel, 1962; Heilbronn and Widlund, 1970), also affect phospholipid turnover in nervous tissue.
A Field Guide to Animal Tracks by Olaus Johan Murie