Home > Skeletal System > Bones of the Chest and Upper Back > Xiphoid Process of Sternum. The xiphoid process is the smallest and most inferior region of the sternum, or breastbone. At birth, it is a thin, roughly triangular region of cartilage that slowly ossifies into a bone and fuses with the body of the sternum.
Some of the most prevalent diseases known to cause deafness include meningitis, Meniere'mÃ©niÃ¨re S, Disease Alport, syndrome, rubella and. Mumps there are two main causes of, deafness these are congenital and. acquired
Deafness is caused by damage to the structures within the cochlea (For an explanation of the ear see RNID information and resources â behind the scenes). This damage results in loss of both frequency sensitivity and increase in hearing threshold i.e. noises need to be louder to be able to hear them.