The different types of volcanoes are: composite (or stratovolcanoes), shield, cinder cones and spatter cones. Throughout the world, one can see pictures of the four types of volcanoes, each type indicative of the active underground world we often view as static.
Vagus nerve stimulation (VNS TherapyÂ®) is designed to prevent seizures by sending regular, mild pulses of electrical energy to the brain via the vagus nerve. These pulses are supplied by a device something like a pacemaker. 1  The VNS device is sometimes referred to as a pacemaker for the brain..  The vagus nerve is part of the autonomic nervous system, which controls functions of the body that are not under voluntary control, such as the heart rate.
The vagus nerve is actually two nerves, both of which run from the brain stem and branch out separately, down the body, across the abdomen and to the main organs such as the heart and stomach.he vagus nerve is directly responsible for a number of bodily functions, such as breathing, maintaining digestive function, keeping the brain up to date with what we have eaten and/or digested and monitoring the heart beat to keep it regular.