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The distribution of muscarinic ACh receptors was studied autoradiographically in cryostat sections of the pigeon telencephalon using 3H-Quinuclidinylbenzylate (QNB) as a ligand. Highest receptor density was observed in the hyperstriatum ventrale, palaeostriatum augmentatum, septum, and parts of the archistriatum In sites of known sensory input of… (More)
CNS myelin was isolated by a conventional method from a wide range of vertebrate classes and analyzed by SDS-PAGE for proteins (Coomassie blue) and glycoproteins (concanavalin A (Con-A)-peroxidase). Mammalian, avian and reptilian myelin shared similar protein patterns (basic protein, BP; intermediate protein, DM-20; proteolipid protein, PLP; Wolfgram… (More)
The distribution of cholinergic neurons is studied in the brains of cyclostomes (Lampetra fluviatilis and Myxine glutinosa) representing an early stage of vertebrate evolution. Histochemical localization of acetylcholinesterase (AChE) is complemented by quantitative determinations of acetylcholine (ACh), cholinacetyltransferase (ChAT) and AChE. The… (More)
In the brain of the hagfish Myxine glutinosa the distribution of acetylcholinesterase has been studied in serial cryostat sections. High activity was found in the motor column of the brain stem, in the pars ventralis thalami and in the primordium hippocampi. In the hemispheres and the olfactory bulb the ACHE-content is low.
The patterns of the anterior lateral-line afferents of Lampetra fluviatilis as revealed by transganglionic transport of horseradish peroxidase are described. The afferents form two roots in entering the rhombencephalon. Fibers of the dorsalmost root can be traced to a short dorsal fascicle which runs along the dorsal nucleus. The ventral roots form two… (More)
The brain weight - body weight relation was studied in 91 specimens of the order Cyclostomata (69 Petromyzonoidea, 22 Myxinoidea) and compared to data from other vertebrates. The interspecific slope of cyclostomes differs from that of other vertebrates (a = 0.23 in petromyzonts, a = 0.41 in myxonoids). Differences observed in the relationship of brain parts… (More)