AUDITORY CANAL FUNCTION SKIN

Risk factors for cancer of the ear flap include: The cause of ear cancer is largely unknown. They also contain the inner ear and the nerves that control the movement of the face and tongue. The outside of the mastoid bone is a hard solid bone but inside is bone that is shaped like honeycomb. It is the lumpy bit you can feel behind your ear. One part of the temporal bone is called the mastoid bone. The temporal bone is part of the skull above the ear. The ear canal, middle ear and inner ear are all within the temporal bone. The bone that surrounds the ear is called the temporal bone. The inner ear also has a number of fluid filled cavities which help us to balance. It converts the vibrations from the middle ear into nerve impulses which then travel to the brain. The cochlea has lots of tiny hair-like nerves on it. It also contains a small spiral tube called the cochlea. These pass on the vibrations from the eardrum to the inner ear. The middle ear is a small cavity that contains 3 small bones: the hammer (malleus), the anvil (incus) and the stirrup (stapes). It is part of the outer ear, but the stages, symptoms, and treatment of ear canal cancer are different to other cancers of the outer ear. The ear canal is the passage running from the outer ear to the middle ear. The eardrum vibrates when a sound is made. It protects the rest of the ear and helps us collect sound. The outer ear is the part of the ear we can see. The earĪnother important part is the bone that surrounds and protects the ear (the temporal bone).

AUDITORY CANAL FUNCTION SKIN

Between 6 and 10 out of 100 skin cancers (between 6 and 10%) develop on the outer ear.Ĭancers that develop inside the ear (the middle and inner ear) are rare. Most of these cancers start in the skin of the outer ear. Duplication for commercial use must be authorized in writing by ADAM Health Solutions.Ear cancer is when abnormal cells in the ear start to grow and divide in an uncontrolled way. Links to other sites are provided for information only - they do not constitute endorsements of those other sites. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. This site complies with the HONcode standard for trustworthy health information: verify here. Learn more about A.D.A.M.'s editorial policy editorial process and privacy policy. is among the first to achieve this important distinction for online health information and services. follows rigorous standards of quality and accountability. is accredited by URAC, for Health Content Provider (URAC's accreditation program is an independent audit to verify that A.D.A.M. Those near the oval window respond to higher frequencies.Ī.D.A.M., Inc. This transmits waves of sound through the cochlear fluid, sending the organ of Corti into motion.įibers near the upper end of the cochlea resonate to lower frequency sound. Let's watch this process in action.First, the stapes rocks against the oval window. There is an inner row on the left and three outer rows on the right. In this cut-view, you can see the organ of Corti with its four rows of hair cells. These cells translate vibrations into electrical impulses that are carried to the brain by sensory nerves. It consists of tiny hair cells that line the cochlea. This action is passed onto the cochlea, a fluid-filled snail-like structure that contains the organ of Corti, the organ for hearing.

The stapes pushes in and out against a structure called the oval window. Also called the hammer, it transmits sound vibrations to the incus, which passes them to the stapes. The eardrum is connected to the malleus, one of three small bones of the middle ear. Sound waves entering the ear travel through the external auditory canal before striking the eardrum and causing it to vibrate.

Auditory canal function