scholarly journals Acetylcholine as a Neuromodulator: Cholinergic Signaling Shapes Nervous System Function and Behavior

Neuron ◽  
2012 ◽  
Vol 76 (1) ◽  
pp. 116-129 ◽  
Author(s):  
Marina R. Picciotto ◽  
Michael J. Higley ◽  
Yann S. Mineur
Author(s):  
Giedre Milinkeviciute ◽  
Karina S. Cramer

The auditory brainstem carries out sound localization functions that require an extraordinary degree of precision. While many of the specializations needed for these functions reside in auditory neurons, additional adaptations are made possible by the functions of glial cells. Astrocytes, once thought to have mainly a supporting role in nervous system function, are now known to participate in synaptic function. In the auditory brainstem, they contribute to development of specialized synapses and to mature synaptic function. Oligodendrocytes play critical roles in regulating timing in sound localization circuitry. Microglia enter the central nervous system early in development, and also have important functions in the auditory system’s response to injury. This chapter highlights the unique functions of these non-neuronal cells in the auditory system.


2021 ◽  
Vol 13 (5) ◽  
pp. 2439
Author(s):  
Alexis Espinoza-Salinas ◽  
Edgardo Molina-Sotomayor ◽  
Johnattan Cano-Montoya ◽  
Jose Antonio Gonzalez-Jurado

Autonomic nervous system function is an important predictor of physical fitness. The objective of this study was to find out the associations of autonomic activity parameters, lipid profile, insulin concentrations, and insulin resistance in overweight men with the level of physical activity. A descriptive and correlational study was carried out in 28 overweight men: 14 physically active (PA) and 14 physically inactive (PI). The following variables were assessed: Level of physical activity, HRV (heart rate variability), basal insulin, HOMA-IR index (Homeostasis Model Assessment Insulin-Resistance), and lipid profile. The main results show a positive correlation between the spectral parameters of the HRV and total cholesterol (r = 0.24), LDL (r = 0.59), VLDL (r = 0.86), and insulin (r = 0.88) of sedentary people, evidencing a directly proportional correlation with BMI. We conclude that weight gain and a sedentary lifestyle are associated with an increase in sympathetic discharge, which, in turn, is associated with an increase in lipid profile and insulin levels.


2010 ◽  
Vol 1338 ◽  
pp. 20-35 ◽  
Author(s):  
Irfan A. Qureshi ◽  
John S. Mattick ◽  
Mark F. Mehler

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