Observing the dynamics, rhythms, and variations of migrating biological
cells under the microscope exhibits fascinating complex properties. Our
work tries to quantify and classify the dynamics of cell migration starting
from experimental observations of living cells. From the contours of
individual cells the probability distribution of velocities, the velocity
correlation function and the mean square displacement are calculated.
The results show similarities with an Ornstein-Uhlenbeck process but
also characteristic differences, which can be interpreted as signatures
of an anomalous dynamics.