There are plenty of answers. Neuroscience can tell us something about the nature of cognition, motor actions and the role of our will.
Given that the term 'free will' tells us absolutely nothing about the nature and means of thought and response, some neuroscientists prefer to refer to the brain as rational system, a parallel information processor, with the ability to acquire and process information and respond rationally (or irrationally if damaged or chemically altered), which really has nothing to do with 'free will.'
For instance;
''I don't think "free will" is a very sensible concept, and you don't need neuroscience to reject it -- any mechanistic view of the world is good enough, and indeed you could even argue on purely conceptual grounds that the opposite of determinism is randomness, not free will! Most thoughtful neuroscientists I know have replaced the concept of free will with the concept of rationality -- that we select our actions based on a kind of practical reasoning. And there is no conflict between rationality and the mind as a physical system -- After all, computers are rational physical systems!'' - Martha Farah, director of the University of Pennsylvania's Center for Cognitive Neuroscience and a prominent neuro-ethicist.
''This review deals with the physiology of the initiation of a voluntary movement and the appreciation of whether it is voluntary or not. I argue that free will is not a driving force for movement, but a conscious awareness concerning the nature of the movement. Movement initiation and the perception of willing the movement can be separately manipulated.
Movement is generated subconsciously, and the conscious sense of volition comes later, but the exact time of this event is difficult to assess because of the potentially illusory nature of introspection.
Neurological disorders of volition are also reviewed. The evidence suggests that movement is initiated in the frontal lobe, particularly the mesial areas, and the sense of volition arises as the result of a corollary discharge likely involving multiple areas with reciprocal connections including those in the parietal lobe and insular cortex.'''
Volitional control of movement: Clinical Neurophysiology, Volume 118, Issue 6, Pages 1179-1192 M. Hallett
