Paroxysmal sympathetic hyperactivity (PSH) is a critical yet under‐recognised complication following acute brain injuries, particularly traumatic brain injury (TBI) and encephalitis.

Sympathetic activation has been associated with the development and complications of hypertension. While the prevalence of hypertension and its cardiovascular risks in women are found to be less ...

Results showed subclinical sympathetic ... vasomotor responses indicated distinct participation of abnormally augmented sympathetic tone and especially of alpha-sympathetic hyperactivity, ...

Meanwhile, Yan (2016) found that abuse survivors had heightened sympathetic hyperactivity, hypertension, depression, and anxiety.

"Hyperactivation of Sympathetic Nerves Drives Depletion of Melanocyte Stem Cells." Nature (First published: January 22, 2020) DOI: 10.1038/s41586-020-1935-3 More references ...