Health and social care- The ear

External ear 

  1. location - the outermost part of the ear, including the auricle ( pinna) and the ear canal.

  2. Function - captures sound waves and directs them towards the ear drum.

Middle ear-

Location- the air filled cavity behind the eardrum, containing the ossicles (malleus,incus, stapes)

Function- transmits sound vibrations from the ear drum to the inner ear.

Inner ear-

Location- the innermost part of the ear located within the temporal bone.

Function- contations the cochlea ( for hearing and the vestbuliar system ( for balance)

eardrum-

Location- between the external ear and the middle ear. Thin layer of tissue that passes on noises to the middle ear.

Function vibrates in response to sound waves, transmitting these vibrations to the ossicles.

Stapes, incus, malleus - (ear bones)

Location- in the middle ear bones that amplify the sound to cochlea

function - transmit sound vibrations from the eardrum to the inner ear.

cochlea-

Location - inner ear

Function- contains jelly like fluid in coiled tubes that looks like a shell. This converts the noises into sound vibrations into nerve impulses that are sent to the brain.

Organ of corli-

location- within the cochlea

function- contains hair cells that convert sound vibrations into electrical signal/ nerve impulses

Eulashian tube-

location- connects the middle ear to the back of the throat.

function- connects the middle of the ear to the throat and ensures the pressure on the middle ears equal to pressure outside of the ear. Equalises air pressure on both sides of the eardrum and drains fluid from the middle ear.

Round window-

location- below and slightly behind oval window in the middle ear.

function - drum like membrane, allows fluid movement within the cochlea, which is essential for hearing, vibrations pass on to cochlea.

auditory nerve-

location- extends from the cochlea to the brainstem

function- carries auditory sensory infromation through bundles of nerves from the cochlea to the brain.

causes of deafness-

genetic factors hereditary conditions can lead to congential hearing loss 

infections such as meningitis, mealses and mumps can cause hearing loss

noise exposure- prolonged exposure to loud noises can damage the inner ear.

aging- due to old age

ear infections- chronic ear infections can lead to hearing loss

truama- injury to the lead or ear can cause hearing loss

symptoms of deafness

difficulty hearing- trouble hearing conversations, especially in noisy enviroments

muffled sounds- sounds may seem or unclear

Asking for repetition - frequently asking other to repeat themselves

volume increase- needing to increase the volume on electronic devices

social withdrawal- avoiding social situations due to diffculty hearing

tinnitus-ringing or buzzing in the ears.

treatments for deafness

depends on severity of hearing loss

hearing aids- amplify sounds to make them easier to hear

cochlear implants- electronic devices that can provide a sense of sound

care needs for deafness

The ear is divided into three main parts: the external ear, the middle ear, and the inner ear, each with specific functions to enable hearing and balance.

External ear

  1. Location: The outermost part of the ear, including the auricle (pinna) and the ear canal.

  2. Function: Captures sound waves and directs them towards the eardrum.

Middle ear

  1. Location: The air-filled cavity behind the eardrum, containing the ossicles (malleus, incus, stapes).

  2. Function: Transmits sound vibrations from the eardrum to the inner ear.

Inner ear

  1. Location: The innermost part of the ear, located within the temporal bone.

  2. Function: Contains the cochlea (for hearing) and the vestibular system (for balance).

Components and their specific functions:

  • Eardrum: Located between the external ear and the middle ear. This thin layer of tissue vibrates in response to sound waves, transmitting these vibrations to the ossicles.

  • Stapes, Incus, Malleus (Ear bones): Located in the middle ear. These bones amplify sound and transmit vibrations from the eardrum to the inner ear, specifically to the cochlea.

  • Cochlea: Located in the inner ear. It contains a jelly-like fluid within coiled tubes that resemble a shell. Its function is to convert sound vibrations into nerve impulses that are then sent to the brain.

  • Organ of Corti: Located within the cochlea. It contains hair cells that convert sound vibrations into electrical signals (nerve impulses).

  • Eustachian tube: Connects the middle ear to the back of the throat. Its function is to equalize air pressure on both sides of the eardrum and drain fluid from the middle ear.

  • Round window: Located below and slightly behind the oval window in the middle ear. This drum-like membrane allows fluid movement within the cochlea, which is essential for hearing, as vibrations pass into the cochlea.

  • Auditory nerve: Extends from the cochlea to the brainstem. Its function is to carry auditory sensory information through bundles of nerves from the cochlea to the brain.