The inner ear includes the cochlea, the semi-circular canals and the auditory nerve.
Most hearing loss is a result of problems with the inner ear. Such a hearing loss is generally refered to as a sensorineural hearing loss. It may also be called (less accurately) a "nerve loss" even though the most likely cause is the cochlea.
The NCSHHH web site has an exclusive 3D model of an inner ear that you can view and interact with on your computer if you would like ...Find Out How