Best winter vacations in the us on ventrodorsal adj. oriented or directed from the front (ventral) region of the body to the back (dorsal) region. Compare dorso-ventral. ventrodorsally adv. ventromedial hypothalamic syndrome a set of symptoms caused by experimental lesions in the ventromedial nucleus of the hypothalamus in the brain. The syndrome consists of two stages. The first is characterized by hyperphagia (overeating) and subsequent weight gain, resulting in obesity. Best winter vacations in the us 2016.