scholarly journals Olfactory Lobe

2020 ◽  
Author(s):  
Keyword(s):  
Olfactory Lobe

Odour Discrimination: “Sex Pheromone Specialists” in the Olfactory Lobe of the Cockroach

Nature ◽  
1970 ◽  
Vol 227 (5260) ◽  
pp. 855-855 ◽  
Author(s):  
MINORU YAMADA ◽  
SHOZIRO ISHII ◽  
YASUMASA KUWAHARA
Keyword(s):  
Sex Pheromone ◽  
Olfactory Lobe ◽  
Odour Discrimination

Levels of specifically bound [3H]ketanserin compared with levels of serotonin (5HT) in the brain regions of juvenile and sexually recrudescing female rainbow trout, Oncorhynchus mykiss

2000 ◽  
Vol 78 (3) ◽  
pp. 228-236 ◽  
Author(s):  
Smriti M Agrawal ◽  
Robert J Omeljaniuk
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Electrochemical Detection ◽  
Binding Sites ◽  
High Performance ◽  
Preoptic Area ◽  
Brain Regions ◽  
Olfactory Lobe ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
The Brain

This study compared the distribution of specifically bound [3H]ketanserin (Bsp) with serotonin (5HT) in brain regions of juvenile and sexually recrudescing female trout. Amounts of Bsp varied widely among brain regions and consistently differed between juvenile and sexually recrudescing females. Levels of Bsp were significantly greater in the hypothalamus than the olfactory lobe, which were at least threefold greater than in all other tissues examined (Kruskal-Wallis test, p < 0.05). Bsp densities in the hypothalamus, preoptic area, and optic lobe were significantly greater in juveniles compared with corresponding tissues from sexually recrudescing females (Mann-Whitney U test, p < 0.05); in contrast, Bsp in olfactory lobe and spinal cord did not differ significantly between the two classes of fish. 5HT concentration was determined by high performance liquid chromatography - electrochemical detection (HPLC-EC) analysis. Biogenic amine standards eluted in a stereotypic pattern, with peaks consistently separable in time. 5HT concentration was significantly greater in hypothalamus than in olfactory lobe and undetectable in the pituitary (Kruskal-Wallis test, p < 0.05). Trends in distribution of Bsp and 5HT were comparable in the hypothalamus and preoptic area in juvenile and sexually recrudescing females. In general, density of specific [3H]ketanserin binding sites was directly related to 5HT content of brain regions in juvenile and sexually recrudescing females. 5HT concentrations (pmol/g tissue) were approximately 900-fold greater than Bsp (fmol/g tissue) in all brain regions, and approximately 300-fold greater than Bsp in the olfactory lobe. These results suggest important regulatory role(s) for 5HT in the trout preoptic-hypothalamo-hypophysial axis, which may differ from 5HT role(s) in trout olfactory lobe.Key words: high performance liquid chromatography - electrochemical detection, [3H]ketanserin, sexually recrudescing female trout.

scholarly journals III. Researches on the comparative structure of the cortex cerebri

1880 ◽  
Vol 171 ◽  
pp. 35-64 ◽  
Keyword(s):  
Comparative Anatomy ◽  
Regional Distribution ◽  
Olfactory Lobe ◽  
Important Work ◽  
Fresh State ◽  
Limbic Lobe ◽  
Comparative Structure ◽  
Cortex Cerebri ◽  
The Brain ◽  
Full Investigation

The object and scope of this paper are to detail the results of a full investigation into the minute structure of the cerebral cortex in the Pig, and to add such notes upon the histology of the same structure in the Sheep and Cat as will suffice for a fair comparative view of those divergencies in fundamental structure which present themselves between the brain of these animals and that of the highest members of the Mammalian series. Attention has been especially directed to the greater mass formed by the parietal, frontal, and upper arc of the limbic lobe, the inferior arc of the limbic lobe (gyrus hippocampi) and the olfactory lobe being left for subsequent examination. The method adopted has been that of slicing the hemispheres of fresh brain from end to end upon the freezing microtome, and examining each individual section, both in the fresh state and after preservation, by a method already described. Tables containing details of the dimensions of cells and depth of layers accompany the paper, being collated at the end for convenience of reference. The Convolutions of the Brain In the Pig. The regional distribution of ganglionic cells in the cortex of this animal constitutes so important a portion of our inquiry that, in order to avoid any obscurity in the subsequent sketch, it will be advisable to review briefly the arrangement of the convolutions and sulci. In doing so I shall follow the terminology adopted by Professor Broca, in his late important work on the comparative anatomy of the convolutions in Mammals.

Both heat shock and water deprivation trigger Hsp70 expression in the olfactory lobe of the crab Chasmagnathus granulatus

2008 ◽  
Vol 443 (3) ◽  
pp. 251-256 ◽  
Author(s):  
Lia Frenkel ◽  
Beatriz Dimant ◽  
Enrique L. Portiansky ◽  
Héctor Maldonado ◽  
Alejandro Delorenzi
Keyword(s):  
Heat Shock ◽  
Water Deprivation ◽  
Hsp70 Expression ◽  
Olfactory Lobe ◽  
Chasmagnathus Granulatus

scholarly journals In vivo recordings of spontaneous and odor-modulated dynamics in thelimax olfactory lobe

2001 ◽  
Vol 47 (1) ◽  
pp. 80-80 ◽  
Author(s):  
I. R. C. Cooke ◽  
A. Gelperin
Keyword(s):  
Olfactory Lobe

scholarly journals Sensory neurons of the Atonal lineage pioneer the formation of glomeruli within the adult Drosophila olfactory lobe

Development ◽  
2002 ◽  
Vol 129 (5) ◽  
pp. 1251-1260 ◽  
Author(s):  
Dhanisha Jhaveri ◽  
Veronica Rodrigues
Keyword(s):  
Sensory Neurons ◽  
Glial Cells ◽  
Crucial Role ◽  
Sensory Innervation ◽  
Projection Neurons ◽  
Olfactory Lobe ◽  
Adult Drosophila

The first centers for processing of odor information by animals lie in the olfactory lobe. Sensory neurons from the periphery synapse with interneurons in anatomically recognizable units, termed glomeruli, seen in both insects and vertebrates. The mechanisms that underlie the formation of functional maps of the odor-world in the glomeruli within the olfactory lobe remains unclear. We address the basis of sensory targeting in the fruitfly Drosophila and show that one class of sensory neurons, those of the Atonal lineage, plays a crucial role in glomerular patterning. Atonal-dependent neurons pioneer the segregation of other classes of sensory neurons into distinct glomeruli. Furthermore, correct sensory innervation is necessary for the arborization of projection neurons into glomeruli and for the elaboration of processes of central glial cells into the lobe.

scholarly journals Acetylcholinesterase, Specific Acetylcholinesterase and Total Protein Concentrations in the Brain Regions of Broiler Chickens Fed Dietary Monosodium Glutamate

2019 ◽  
Vol 7 (6) ◽  
pp. 883
Author(s):  
Olumuyiwa Joseph Olarotimi ◽  
Imoleayo Sarah Oladeji ◽  
Olufemi Adesanya Adu ◽  
Francis Ayodeji Gbore
Keyword(s):  
Total Protein ◽  
Broiler Chickens ◽  
Optic Lobe ◽  
Monosodium Glutamate ◽  
Acetylcholinesterase Activity ◽  
Brain Regions ◽  
Pineal Body ◽  
Olfactory Lobe ◽  
Brain Functions ◽  
The Brain

The study was carried out to examine the effect of varied levels of dietary monosodium glutamate on acetylcholinesterase, specific acetylcholinesterase and total protein concentrations in the brain regions of broiler chickens. Three hundred (300) day – old unsexed Abor – acre chickens were randomly assigned to diets: A, B, C, D, E and F containing 0.00, 0.25, 0.50, 0.75, 1.00 and 1.25 g/kg MSG respectively. Each treatment was replicated 5 times with 10 birds per replicate. The birds were fed ad – libitum and provided with clean water for 8 weeks (56 days) after which 2 birds per replicates were slaughtered. The brains were removed, dissected into different regions comprising of the olfactory lobe, pineal body, optic lobe, cerebellum and the medulla oblongata. The different parts of the brain were homogenized to determine the acetylcholinesterase and total protein which were also used in the assessment of the specific acetylcholinesterase of the brain. No significant differences were observed in the acetylcholinesterase activity of the olfactory lobe, pineal body, optic lobe, cerebellum except for the medulla. Likewise, the dietary monosodium glutamate did not influence the activities of the total protein and specific acetylcholinesterase of the olfactory lobe portion of the brain. The dietary monosodium glutamate exerted significant effects on the total protein of other brain parts studied and which invariably resulted in significant changes in the specific acetylcholinesterase of the optic lobe, cerebellum and medulla except for the optic lobe. This study revealed that monosodium glutamate added to broilers diet above 0.75 g/kg significantly altered the concentration of the brain acetylcholinesterase, total protein and specific acetylcholinesterase thereby impaired brain functions.

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