Sympathectomy causes wall thinning, elongation, convolution, and aneurysm formation

"Sympathectomy causes basilar artery enlargment, which is beneficial for maintaining cerebral blood flow; however, it also causes wall thinning, elongation, convolution, and aneurysm formation, which may be hazardous in stenoocclusive carotid artery disease. Sympathectomy can prevent new vessel formation and hyperthyrophic changes at the posterior circulation. Neovascularisation is not detected adequately in sympathectomised animals."



Acta Neurochirurgica156.5 (May 2014): 963-9.

epinephrine modulates brain limbic structures to encode and store new information

The excitatory actions of epinephrine were not observed

The excitatory actions of epinephrine were not observed in groups given an identical dose of the hormone after peripheral β-adrenergic receptor blockade with sotalol. These findings demonstrate that neural discharge in vagal afferent fibers is increased by elevations in peripheral concentrations of epinephrine and the significance of these findings in understanding how epinephrine modulates brain limbic structures to encode and store new information into memory is discussed.

Epinephrine administration increases neural impulses propagated along the vagus nerve: Role of peripheral β-adrenergic receptors

T. Miyashita and C.L. Williams

^aDepartment of Neurosciences, University of New Mexico, Albuquerque, NM 87131, USA
^bDepartment of Psychology, The University of Virginia, Charlottesville, VA 22904, USA

Received 9 June 2005; 

revised 17 August 2005; 

accepted 29 August 2005. 

Available online 17 October 2005.