"Volitional control" refers to the ability to consciously make decisions and exert deliberate control over one's actions or behavior. It means having the power to choose and direct your own actions based on your own will or desires. Full definition
What's new is that we have been able to use this artificial neuronal connection bypassing the lesion site to restore volitional control of the subject's own paretic arm. (sciencedaily.com)
This allowed the monkey to electrically stimulate the spinal cord through volitionally controlled brain activity and thereby to restore volitional control of the paretic hand. (sciencedaily.com)
So, you gain volitional control and you decide what's going to happen during your dream. (businessinsider.com)