  The inspiral of stellar compact objects into massive black holes, usually
known as extreme-mass-ratio inspirals (EMRIs), is one of the most important
sources of gravitational-waves for the future Laser Interferometer Space
Antenna (LISA). Intermediate-mass-ratio inspirals (IMRIs are also of interest
to advance ground-based gravitational-wave observatories. We discuss here how
modifications to the gravitational interaction can affect the signals emitted
by these systems and their detectability by LISA. We concentrate in particular
on Chern-Simons modified gravity, a theory that emerges in different quantum
gravitational approaches.
