any light on the matter of differentiating abulia from other DDMs. The experts used the terms "apathy" and "abulia" interchangeably and debated whether or not abulia was a discrete entity, or just a hazy gray area on a spectrum of more defined disorders. Four of the experts said abulia was a sign and a symptom, and the group was split on whether or not it was a syndrome. Another survey, which consisted of true and false questions about what abulia is distinct from, whether it is a sign, symptom, or syndrome, where lesions are present in cases of abulia, what diseases are commonly associated with abulia, and what current treatments are used for abulia, was sent to 15 neurologists and 10 psychiatrists. Most experts agreed that abulia is clinically distinct from depression, akinetic mutism, and alexithymia. However, only 32% believed abulia was different from apathy, while 44% said they were not different, and 24% were unsure. Yet again, there was disagreement about whether or not abulia is a sign, symptom, or syndrome. The study of motivation has been mostly about how stimuli come to acquire significance for animals. Only recently has the study of motivational processes been extended to integrate biological drives and emotional states in the explanation of purposeful behavior in human beings. Considering the number of disorders attributed to a lack of will and motivation, it is essential that abulia and apathy be defined more precisely to avoid confusion. Causes Many different causes of abulia have been suggested. While there is some debate about the validity of abulia as a separate disease, experts mostly agree that abulia is the result of frontal lesions and not with cerebellar or brainstem lesions. As a result of more and more evidence showing that the mesolimbic and the mesocortical dopamine system are key to motivation and responsiveness to reward, abulia may be a dopamine-related dysfunction. Abulia may also result from a variety of brain injuries which cause personality change, such as dementing illnesses, trauma, or intracerebral hemorrhage (stroke), especially stroke causing diffuse injury to the right hemisphere. Damage to the basal ganglia Injuries to the frontal lobe and/or the basal ganglia can interfere with an individual's ability to initiate speech, movement, and social interaction. Studies have shown that 5-67% of all patients with traumatic brain injuries and 13% of patients with lesions on their basal ganglia experience some form of diminished motivation.