The Ventral Respiratory Group (VRG) is a part of the medulla oblongata that is responsible for stimulating the accessory muscles required for forced breathing, such as during intense physical activity.
The Ventral Respiratory Group (VRG) is a cluster of neurons located in the medulla oblongata that play a crucial role in controlling the forced movements of respiration. More specifically, the VRG activates the accessory muscles that are responsible for forced inspiration and forced expiration, such as during heavy exercise or any other actions requiring a higher level of ventilation.
The VRG includes neurons that are responsible for stimulating the accessory muscles involved in respiration to induce forced inspiration and expiration. This group of neurons works in tandem with the dorsal respiratory group (DRG), which controls the rhythm of quiet breathing. While the DRG takes care of calm, rhythmic breathing by stimulating the diaphragm and intercostal muscles, the VRG is involved when a higher breathing effort is necessary.
the VRG is essential for ventilation and increases the capacity of the respiratory system to move air in and out of the lungs during periods of high respiratory demand.