scholarly journals ULTRASTRUCTURE OF SYNAPSES IN THE SUPRAOPTIC NUCLEUS OF THE CAT AFTER INDUCED HYPOTHERMIA

2000 ◽  
Vol 144 (143) ◽  
pp. 59-62
Author(s):  
Jarmila Malinska ◽  
Jiri Malinsky
Keyword(s):  
Supraoptic Nucleus ◽  
Induced Hypothermia ◽  
Ultrastructure Of Synapses

THE RELATION BETWEEN THE HYPOTHALAMIC NEUROSECRETION AND THE CORTICOTROPHIN RELEASE IN EXPERIMENTAL CONDITIONS

1960 ◽  
Vol XXXIV (I) ◽  
pp. 8-18 ◽  
Author(s):  
E. Kivalo ◽  
U. K. Rinne
Keyword(s):  
Paraventricular Nucleus ◽  
Median Eminence ◽  
Supraoptic Nucleus ◽  
Acute Stress ◽  
Neurosecretory Material ◽  
Experimental Conditions ◽  
Hypothalamic Cells ◽  
The One ◽  
Hypophysial Portal ◽  
Acth Release

ABSTRACT Acute stress, chronic stress plus hydration, cortisone treatment, cortisone treatment plus dehydration were used as methods of investigation and the relation between the neurosecretory activity of the hypothalamic supraoptic nucleus and paraventricular nucleus and the neurosecretory material around the hypophysial portal vessels of the median eminence on the one hand and the corticotrophin release on the other hand, has been studied in the rat. Whereas stress stimulates both the activity of the above mentioned cells of the hypothalamus and the ACTH release, stress plus hydration causes a depression of these hypothalamic cells but nevertheless causes a marked ACTH release. Cortisone inhibits the activity of the cells in the supraoptic nucleus and the paraventricular nucleus as well as the ACTH release whereas cortisone plus dehydration causes stimulation but inhibits the ACTH release. In some stress and cortisone treatment groups the variations of the neurosecretory material around the hypophysial portal vessels and of the ACTH release were found to show a correlation. It is concluded that the activity of the cells of the supraoptic nucleus and the paraventricular nucleus and the ACTH release do not seem to have any definite connection, whereas some observations indicate that the neurosecretory material in the region of the median eminence around the hypophysial portal vessels may have some significance in ACTH release.

Drug-Induced Hypothermia in Stroke Models: Does it Always Protect?

2013 ◽  
Vol 999 (999) ◽  
pp. 1-6
Author(s):  
Meijuan Zhang ◽  
Haiying Wang ◽  
Jinbing Zhao ◽  
Cong Chen ◽  
Rehana K. Leak ◽  
...  
Keyword(s):  
Induced Hypothermia ◽  
Drug Induced ◽  
Stroke Models

scholarly journals 3D Ultrastructure of Synaptic Inputs to Distinct GABAergic Neurons in the Mouse Primary Visual Cortex

2020 ◽  
Author(s):  
Yang-Sun Hwang ◽  
Catherine Maclachlan ◽  
Jérôme Blanc ◽  
Anaëlle Dubois ◽  
Carl C H Petersen ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Pyramidal Neuron ◽  
Cell Types ◽  
Gabaergic Neurons ◽  
Inhibitory Synapses ◽  
Synaptic Inputs ◽  
Neuronal Types ◽  
The Difference ◽  
Ultrastructure Of Synapses

Abstract Synapses are the fundamental elements of the brain’s complicated neural networks. Although the ultrastructure of synapses has been extensively studied, the difference in how synaptic inputs are organized onto distinct neuronal types is not yet fully understood. Here, we examined the cell-type-specific ultrastructure of proximal processes from the soma of parvalbumin-positive (PV+) and somatostatin-positive (SST+) GABAergic neurons in comparison with a pyramidal neuron in the mouse primary visual cortex (V1), using serial block-face scanning electron microscopy. Interestingly, each type of neuron organizes excitatory and inhibitory synapses in a unique way. First, we found that a subset of SST+ neurons are spiny, having spines on both soma and dendrites. Each of those spines has a highly complicated structure that has up to eight synaptic inputs. Next, the PV+ and SST+ neurons receive more robust excitatory inputs to their perisoma than does the pyramidal neuron. Notably, excitatory synapses on GABAergic neurons were often multiple-synapse boutons, making another synapse on distal dendrites. On the other hand, inhibitory synapses near the soma were often single-targeting multiple boutons. Collectively, our data demonstrate that synaptic inputs near the soma are differentially organized across cell types and form a network that balances inhibition and excitation in the V1.

Late-Onset Clozapine-Induced Hypothermia Accompanied by Electrocardiogram Osborn Waves

2009 ◽  
Vol 29 (2) ◽  
pp. 183-185 ◽  
Author(s):  
Georgios Papazisis ◽  
Thrasivoulos Tzellos ◽  
Dimitrios Tahmatzidis ◽  
Konstantinos Dolianitis ◽  
Dimitrios Kouvelas
Keyword(s):  
Late Onset ◽  
Induced Hypothermia

Acetaminophen-induced hypothermia, hepatic congestion, and modification by N-acetylcysteine in mice

1981 ◽  
Vol 59 (3) ◽  
pp. 500-507 ◽  
Author(s):  
Robin M. Walker ◽  
Thomas E. Massey ◽  
Timothy F. McElligott ◽  
William J. Racz
Keyword(s):  
Induced Hypothermia ◽  
Hepatic Congestion
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