During REM sleep, the locus coeruleus stops releasing noradrenaline. By blocking the cascade, the association between memory and emotional response is broken. This may not occur so frequently in restless sleepers, resulting in rumination and PTSD-like symptoms. For those who usually sleep well, embarrassing feelings experienced at night may be reduced by morning.
Norepinephrine facilitates fear processing by stimulating a population of inhibitory neurons in the amygdala, generating repetitive bursting patterns of electrical activity. This activity changes the frequency of oscillations in the amygdala from resting state to aroused state, promoting the formation of fear memories.
Researchers have found a direct connection between flavan 3-ols consumption and fat browning by activation in the sympathetic nervous system. The findings could help in the development of new treatments for obesity-related disorders.
The old adage that practice makes perfect may very well be true, according to neuroscientists. Researchers found when a male zebra finch is in the presence of an attractive female and delivers its rehearsed mating call, a noradrenaline release in the basal ganglia shuts down variability in song and makes the call as perfect as it can be.
Motor learning deficits associated with autism may be the result of reduced levels of noradrenaline release in the primary motor cortex.
In times of uncertainty, noradrenaline helps us learn and adapt our behaviors, researchers report.
Microglia play a critical role in reorganizing neural connections, fighting infections, and repairing damage to neurons while we sleep.