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 one of the 12 cranial nerves, which conduct impulses between the brain and other parts of the brain and va rious body structures, mostly in the head and neck. The vagus nerve-the longest of the cranial nerves-also extends to organs in the chest and abdomen.(The word vagus comes from a Latin word for wandering.') It serves many organs and structures, including the larynx (voice box), lungs, heart and gastrointestinal tract.he vagus nerve is one of the 12 cranial nerves, which conduct impulses between the brain and other parts of the brain and va rious body structures, mostly in the head and neck. The vagus nerve-the longest of the cranial nerves-also extends to organs in the chest and abdomen.