Cellular forces acting on the adhesive contacts made with the extracel
lular matrix (ECM) contribute significantly to cell shape, viability,
signal transduction and motility. In the past two years, research has
determined how cell spreading influences cell viability as well as cyt
oskeletal organization. The cytoskeleton generates a level of tension
against the ECM that is proportional to ECM stiffness. The strength of
this tension exerted against the ECM affects the migratory speed of t
he cell.