The ventromedial nucleus (also known as ventromedial hypothalamus) is located inside the hypothalamus. It is known as a nucleus because it is a distinct grouping of neurons within the hypothalamus. The ventromedial nucleus is responsible for the feeling of satiation, or fullness after eating, in organisms. It tells us when we have eaten enough and to stop eating. Lesions on the ventromedial nucleus can cause overeating and obesity in organisms because they are not getting the information that they are full. The ventromedial nucleus is also involved in mammalian sexuality like presenting behaviors in female members of a species and scent-marking behaviors in males.