Electron microscopy of medial lemniscal terminal degeneration in the ventral posterolateral thalamic nucleus of the cat

1968 ◽  
Vol 24 (2) ◽  
pp. 159-160 ◽  
Author(s):  
J. Boivie ◽  
J. Westman
Keyword(s):  
Electron Microscopy ◽  
Thalamic Nucleus ◽  
Terminal Degeneration ◽  
Ventral Posterolateral Thalamic Nucleus

Unit responses in area 5b of the suprasylvian gyrus to stimulation of the ventral posterolateral thalamic nucleus

1975 ◽  
Vol 6 (5) ◽  
pp. 358-362
Author(s):  
D. P. Artemenko ◽  
T. M. Mamonets
Keyword(s):  
Thalamic Nucleus ◽  
Suprasylvian Gyrus ◽  
Ventral Posterolateral Thalamic Nucleus ◽  
Stimulation Of

scholarly journals Area-specific synapse structure in branched axons reveals a subcellular level of complexity in thalamocortical networks

2019 ◽  
Author(s):  
Javier Rodriguez-Moreno ◽  
Cesar Porrero ◽  
Astrid Rollenhagen ◽  
Mario Rubio-Teves ◽  
Diana Casas-Torremocha ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thalamic Nucleus ◽  
Circuit Complexity ◽  
Zone Size ◽  
Single Axon ◽  
3D Electron Microscopy ◽  
Structural Differences ◽  
Vesicle Pool ◽  
The Brain ◽  
Subcellular Level

AbstractThalamocortical Posterior nucleus (Po) axons innervating the somatosensory (S1) and motor (MC) vibrissal cortices are key links in the brain neuronal network that allows rodents to explore the environment whisking with their motile vibrissae. Here, using high-end 3D electron microscopy, we demonstrate massive differences between MC vs. S1 Po synapses in a) bouton and active zone size; b) neurotransmitter vesicle pool size; c) mitochondria distribution near synapses; and d) proportion of non-spinous dendrite contacts. These differences are as large, or bigger, than those between Po and ventroposterior thalamic nucleus synapses in S1. Moreover, using single-axon transfection labeling, we show that the structure of boutons in the MC vs. S1 branches of individual Po axons is different. These structural differences parallel striking, recently-discovered divergences in functional efficacy and plasticity between S1 and MC Po synapses, and overall reveal a new, subcellular level of thalamocortical circuit complexity, unaccounted for in current models.

Convergence and interaction of somatic and visceral impulsation on neurons of the ventral posterolateral thalamic nucleus

1985 ◽  
Vol 15 (3) ◽  
pp. 199-206 ◽  
Author(s):  
A. A. Airapetyan ◽  
L. G. Vaganyan ◽  
I. G. Tatevosyan
Keyword(s):  
Thalamic Nucleus ◽  
Ventral Posterolateral Thalamic Nucleus

Thalamic Stimulation as a Treatment for Primary Erythromelalgia: Technical Case Report

2005 ◽  
Vol 57 (suppl_4) ◽  
pp. ONS-E404-ONS-E404 ◽  
Author(s):  
Hans Delye ◽  
Lieven Lagae ◽  
Jos Vermylen ◽  
Bart Nuttin
Keyword(s):  
Thalamic Nucleus ◽  
Recurrent Infection ◽  
Signs And Symptoms ◽  
Lower Limbs ◽  
Burning Pain ◽  
Thalamic Stimulation ◽  
History Of ◽  
Primary Erythromelalgia ◽  
Ice Water ◽  
Ventral Posterolateral Thalamic Nucleus

Abstract OBJECTIVE AND IMPORTANCE: We report the use of bilateral thalamic stimulation in a case of primary erythromelalgia with immediate and important pain relief for 3 years. CLINICAL PRESENTATION: A 12-year-old boy experiencing primary erythromelalgia had a 4-year history of recurrent attacks of severe burning pain in both feet, accompanied by local reddening, swelling, and heating of the skin. The attacks were triggered by warmth and exercise. The pain was relieved only by elevation and cooling of the lower limbs, which he achieved by immersing his legs in a bucket of ice water, resulting in severe ulceration of the skin. INTERVENTION: Because of the gradual aggravation of the signs and symptoms and resistance of the patient's condition to several medical therapies, the patient received spinal cord stimulation. The implants were removed twice because of recurrent infection. Finally, the patient was treated with bilateral electrical stimulation of the ventral posterolateral thalamic nucleus, which resulted in important pain control until 3 years later. The patient was able to avoid water immersions, and all ulcerations disappeared. CONCLUSION: We conclude that thalamic stimulation was successful in this case of primary erythromelalgia.

Terminal degeneration in the mediodorsal cerebral cortex of the lizardAgama agama: Light and electron microscopy

1982 ◽  
Vol 172 (1) ◽  
pp. 45-58 ◽  
Author(s):  
F. G. Wouterlood ◽  
V. E. Alones ◽  
D. Elprana ◽  
A. H. M. Lohman
Keyword(s):  
Electron Microscopy ◽  
Cerebral Cortex ◽  
Light And Electron Microscopy ◽  
Terminal Degeneration

NOCICEPTIVE RESPONSES OF THE LATERAL THALAMIC NUCLEUS EVOKED BY PINCH IN ANESTHETIZED RATS

2011 ◽  
Vol 23 (05) ◽  
pp. 377-382
Author(s):  
Chih-Ping Chen ◽  
Fu-Shan Jaw
Keyword(s):  
Thalamic Nucleus ◽  
Posterior Region ◽  
Anterior Region ◽  
Noxious Stimulus ◽  
Neuronal Responses ◽  
Inclusion Criteria ◽  
Nociceptive Responses ◽  
Ketamine Anesthesia ◽  
Ventral Posterolateral Thalamic Nucleus ◽  
Ventral Posteromedial Thalamic Nucleus

Pinch was used as a noxious stimulus and applied to the tail and hindlimbs of rats to investigate the nociceptive responsiveness of neurons in the lateral thalamus. Pinch stimuli were applied with calibrated pincher, and glass micropipettes filled with 3 M NaCl served as recording electrodes. The lateral thalamus of six rats under ketamine anesthesia was probed, including the ventrobasal (VB) complex and the posterior thalamic nucleus ( Po ), while the noxious stimulus was applied. Neuronal responses in the lateral thalamus were identified with the aid of an audio monitoring device and an oscilloscope, and several inclusion criteria had to be met. A total of 168 neurons were studied across the ventral posterolateral thalamic nucleus (VPL), ventral posteromedial thalamic nucleus (VPM), and Po of the thalamus. Of the neurons assessed in the lateral thalamus, 38 responded to the nociceptive stimuli, and most were located within the Po region of the thalamus. Very few were located in the VB. The number of responsive neurons in the anterior region of the lateral thalamus was significantly greater than the number of responsive neurons in the posterior region of the lateral thalamus. This finding indicates that the anterior region of the lateral thalamus, especially the Po area, may respond more vigorously to noxious stimuli than the posterior region.

scholarly journals Maturation of complex synaptic connections of layer 5 cortical axons in the posterior thalamic nucleus requires SNAP25

2020 ◽  
Author(s):  
Shuichi Hayashi ◽  
Anna Hoerder-Suabedissen ◽  
Emi Kiyokage ◽  
Catherine Maclachlan ◽  
Kazunori Toida ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thalamic Nucleus ◽  
Conditional Knockout ◽  
Synaptic Connections ◽  
Dendritic Shaft ◽  
Vesicular Release ◽  
3D Electron Microscopy ◽  
Immuno Electron Microscopy ◽  
Synaptic Structures ◽  
Corticothalamic Projections

AbstractSynapses are able to form in the absence of neuronal activity, but how is their subsequent maturation affected in the absence of regulated vesicular release? We explored this question using 3D electron microscopy and immuno electron microscopy analyses in the large, complex synapses formed between cortical sensory efferent axons and dendrites in the posterior thalamic nucleus. Using a Snap25 conditional knockout we found that during the first two postnatal weeks the axonal boutons emerge and increase in the size similar to the control animals. However, by P18, when an adult-like architecture should normally be established, axons were significantly smaller with 3D reconstructions showing that each Snap25-cko bouton only forms a single synapse with the connecting dendritic shaft. No excrescences from the dendrites were formed, and none of the normally large glomerular axon endings were seen. These results show that activity mediated through regulated vesicular release from the presynaptic terminal is not necessary for the formation of synapses, but it is required for the maturation of the specialised synaptic structures between layer 5 corticothalamic projections in Po.

Phase and Electron Microscopy of Olfactory Bulb After Sectioning of its Peduncle

1970 ◽  
Vol 28 ◽  
pp. 116-117
Author(s):  
Juan F. Estable-Puig ◽  
Rosita F. de Estable-Puig
Keyword(s):  
Electron Microscopy ◽  
Light And Electron Microscopy ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Albino Rats ◽  
Microscopy Observation ◽  
Olfactory Bulbs ◽  
Post Operation ◽  
Terminal Degeneration ◽  
Made In

The unilateral section of the olfactory peduncle was made in adult albino rats in order to produce axonal and terminal degeneration of the whole system of centrifugal projections. This experiment was carried out with a double purpose. First, to tipify the different structural modes of axonal and terminal degeneration in a correlative light and electron microscopy study. Second, to study the distribution of these central projections to the bulb. The animals were sacrificed by fixation-perfusion 4 to 7 days post-operation and samples of olfactory bulbs were processed as routinely for electron microscopy observation. Thick sections stained with paraphenylenediamine (PPDA)(1) were utilized for phase observation.

Morphology of rat's AV thalamic nucleus in light and electron microscopy

1976 ◽  
Vol 117 (3) ◽  
pp. 387-398 ◽  
Author(s):  
Jan J. Dekker ◽  
Henricus G.J.M. Kuypers
Keyword(s):  
Electron Microscopy ◽  
Thalamic Nucleus ◽  
Light And Electron Microscopy
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