The proximate cause for contagious yawning may lie with mirror neurons in the frontal cortex of certain vertebrates , which , upon being exposed to a stimulus from conspecific ( same species ) and occasionally interspecific organisms , activates the same regions in the brain .
The immediate cause for contagious yawning may be the mirror neurons in the frontal cortex of certain vertebrates , which , upon being exposed to a stimulus , activates the same regions in the brain .