Participation of the substantia nigra dopaminergic neurons in the occurrence of gastric mucosal erosions

2004 ◽  
Vol 81 (1) ◽  
pp. 91-99 ◽  
Author(s):  
Jesus Landeira-Fernandez ◽  
Carlos V Grijalva
Keyword(s):  
Substantia Nigra ◽  
Dopaminergic Neurons ◽  
Gastric Mucosal Erosions

The Effects of Fibrillar Forms of α-Synuclein Protein on Neurogenesis in the Hippocampus, Dopaminergic Neurons of the Substantia Nigra, and the Behavior of Ageing Mice

2018 ◽  
Vol 12 (4) ◽  
pp. 359-365
Author(s):  
V. V. Sherstnev ◽  
O. A. Solov’eva ◽  
M. A. Gruden’ ◽  
A. V. Kedrov ◽  
E. V. Konovalova ◽  
...  
Keyword(s):  
Substantia Nigra ◽  
Dopaminergic Neurons

Cardiovascular depressor responses to stimulation of substantia nigra and ventral tegmental area

1997 ◽  
Vol 273 (6) ◽  
pp. H2549-H2557 ◽  
Author(s):  
Gilbert J. Kirouac ◽  
John Ciriello
Keyword(s):  
Substantia Nigra ◽  
Ventral Tegmental Area ◽  
Intravenous Administration ◽  
Dopaminergic Neurons ◽  
Cardiovascular Responses ◽  
Receptor Blocker ◽  
Transitional Region ◽  
Pars Lateralis ◽  
Ventral Tegmental ◽  
Stimulation Of

Experiments were done in α-chloralose-anesthetized, paralyzed, and artificially ventilated rats to investigate the effect ofl-glutamate (Glu) stimulation of the substantia nigra (SN) and ventral tegmental area (VTA) on arterial pressure (AP) and heart rate (HR). Glu stimulation of the SN pars compacta (SNC) elicited decreases in both mean AP (MAP; −18.9 ± 1.3 mmHg; n = 52) and HR (−26.1 ± 1.6 beats/min; n = 46) at 81% of the sites stimulated. On the other hand, stimulation of the SN pars lateralis or pars reticulata did not elicit cardiovascular responses. Stimulation of the adjacent VTA region elicited similar decreases in MAP (−18.0 ± 2.6 mmHg; n = 20) and HR (−25.4 ± 3.8 beats/min; n = 17) at ∼74% of the sites stimulated. Intravenous administration of the dopamine D2-receptor antagonist raclopride significantly attenuated both the MAP (70%) and the HR (54%) responses elicited by stimulation of the transitional region where the SNC merges with the lateral VTA (SNC-VTA region). Intravenous administration of the muscarinic receptor blocker atropine methyl bromide had no effect on the magnitude of the MAP and HR responses to stimulation of the SNC-VTA region, whereas administration of the nicotinic receptor blocker hexamethonium bromide significantly attenuated both the depressor and the bradycardic responses. These data suggest that dopaminergic neurons in the SNC-VTA region activate a central pathway that exerts cardiovascular depressor effects that are mediated by the inhibition of sympathetic vasoconstrictor fibers to the vasculature and cardioacceleratory fibers to the heart.

Low Levels of Prohibitin in Substantia Nigra Makes Dopaminergic Neurons Vulnerable in Parkinson’s Disease

2017 ◽  
Vol 55 (1) ◽  
pp. 804-821 ◽  
Author(s):  
Debashis Dutta ◽  
Nilufar Ali ◽  
Emili Banerjee ◽  
Raghavendra Singh ◽  
Amit Naskar ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Substantia Nigra ◽  
Dopaminergic Neurons ◽  
Low Levels

Parkinson's Disease

2019 ◽  
pp. 252-273 ◽  
Author(s):  
Vaibhav Walia ◽  
Ashish Gakkhar ◽  
Munish Garg
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Substantia Nigra ◽  
Dopaminergic Neurons ◽  
Older Patients ◽  
Neurodegenerative Disorder ◽  
Progressive Loss ◽  
The Brain

Parkinson's disease (PD) is a neurodegenerative disorder in which a progressive loss of the dopaminergic neurons occurs. The loss of the neurons is most prominent in the substantia nigra region of the brain. The prevalence of PD is much greater among the older patients suggesting the risk of PD increases with the increase of age. The exact cause of the neurodegeneration in PD is not known. In this chapter, the authors introduce PD, demonstrate its history, pathogenesis, neurobiology, sign and symptoms, diagnosis, and pharmacotherapy.

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