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Abstract #3223

Effect of Parasympathetic Stimulation on Brain Activity During Emotional Processing

Barbara Basile1, Andrea Bassi, Giovanni Calcagnini2, Emiliano Macaluso1, Angelica Piccolomini, Carlo Caltagirone3, Marco Bozzali1

1Neuroimaging Laboratory, Santa Lucia Foundation, Rome, Italy, Italy; 23Department of Technology and Health, Italian Institute of Health, Rome, Italy, Italy; 3Department of Neuroscience, University of Rome Tor Vergata, Rome, Italy, Italy

The autonomic nervous system (ANS) is well known in its peripheral functioning, while its central effects are still rather obscure. We present here a novel method that, using fMRI and a parasympathetic stimulation of the carotid baroreceptors, allows to investigate brain activity by a direct perturbation of the ANS. We provide here new evidence that ANS perturbation induces expected peripheral responses together with modulation of brain activity in different regions, during an explicit emotional processing task.

Keywords

acquisition activation activity administered allowing analyses anatomical angry asked assessed automated autonomic avoid behavioral bilateral blood bold brain branches button cardiovascular carotid central cognitive condition conditions confronted continuously control controlled corrected cortex covering defined design detect device differentiate direct discrimination disorders duration efficacious emotion emotional emotionally emotions engaged event evidence experiment expression expressions extending faces facial foundation full functional happy health healthy heart highest humans hypertension implication in vivo induce inducing interaction intervals invasive investigate investigation laboratory loaded lobe longer made maintenance many matrix mental modeling modifications modulate modulation neck need nervous neutral occurring paradigm parasympathetic performance peripheral perturbation physical physiological planar plots preliminary press pressing pressure previously processing randomly reaching receptors recording regulated related relevant relies required resistances response rest role satisfactory seems separated served sinus slices speculations statistical stimulation stimuli subjects suction sympathetic synchronously system task technology thick though threshold transform trend trial unable understanding underwent valence vascular volunteers whether years