| Active systems generate motion due to energy consumption, usually associated to their internal metabolism or to appropriate, localized chemical reactivity. As a result, these systems are intrinsically out of equilibrium and their collective properties result as a balance between their direct interactions and the indirect coupling to the medium in which they displace. Therefore, a dynamical approach is required to analyze their evolution and quantify their self-assembly and ability to generate intermediate and large scale stable structures. I will analyze the peculiarities of collective transport of molecular motors along biofilaments, and the patterns they give rise to due to their coupling to the embedding fluid medium in which they displace. I will also analyze the impact that confinement has in the effective motion of molecular motors and the possibility that confinement modifies the intrinsic molecular motor rectification. |