title: Finite-size effects in microrheology.
abstract: We propose a model to explain finite-size effects in intracellular microrheology observed in experiments. The constrained dynamics of the particles in the intracellular medium, treated as a viscoelastic medium, is described by means of a diffusion equation in which interactions of the particles with the cytoskeleton are modeled by a harmonic force. The model reproduces the observed power law behavior of the mean square displacement in which the exponent depends on the ratio between particle-to-cytoskeleton-network sizes.
authors.affiliation: Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito exterior de Ciudad Universitaria, México Distrito Federal 04510, México. ivan@graef.fciencias.unam.mx
authors.forename: I
authors.initials: I
authors.lastname: Santamaría-Holek
authors.forename: J M
authors.initials: JM
authors.lastname: Rubi