This might be a good news for people with hearing impairment. Scientists have found that stem cells of spiral ganglion (those present in the inner ear) can be effectively used to restore the hearing ability. Spiral ganglion cells are necessary for your ears to function properly. The most common cause of hearing impairment is the irreversible damage in the inner ear. (Read: Hearing loss symptoms diagnosis treatment and complications) Adult spiral ganglion cells are unable to regenerate and thus cannot be used to repair hearing loss. The recent research evidence in a mouse model showed that stem cells of spiral