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Anatomy of the Ear

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

The Auditory Ossicles

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...

The Cochlea

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.

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Related Experiment Video

Updated: Jun 13, 2026

In Vivo Morphometric Analysis of Human Cranial Nerves Using Magnetic Resonance Imaging in Menière's Disease Ears and Normal Hearing Ears

In Vivo Morphometric Analysis of Human Cranial Nerves Using Magnetic Resonance Imaging in Menière's Disease Ears and Normal Hearing Ears

Published on: February 21, 2018

A morphometric study of the human ear.

K Skaria Alexander¹, David J Stott, Branavan Sivakumar

¹Department of Plastic and Reconstructive Surgery, Royal Free Hospital, Pond Street, London NW3 2QG, UK. ksalexander@doctors.org.uk

Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS

|May 8, 2010

Summary

This summary is machine-generated.

Ear size and shape vary significantly by age, sex, and ethnicity, with Indian individuals having the largest ears. Objective measurements could not define prominent ears, leaving the perception to personal aesthetic choice.

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Dissection of the Auditory Bulla in Postnatal Mice: Isolation of the Middle Ear Bones and Histological Analysis

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Published on: January 4, 2017

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Last Updated: Jun 13, 2026

In Vivo Morphometric Analysis of Human Cranial Nerves Using Magnetic Resonance Imaging in Menière's Disease Ears and Normal Hearing Ears

In Vivo Morphometric Analysis of Human Cranial Nerves Using Magnetic Resonance Imaging in Menière's Disease Ears and Normal Hearing Ears

Published on: February 21, 2018

Dissection of the Auditory Bulla in Postnatal Mice: Isolation of the Middle Ear Bones and Histological Analysis

Dissection of the Auditory Bulla in Postnatal Mice: Isolation of the Middle Ear Bones and Histological Analysis

Published on: January 4, 2017

Area of Science:

Anthropometry
Human Morphology
Plastic Surgery

Background:

Ear prominence is a common concern in plastic surgery.
Understanding variations in ear morphology is crucial for aesthetic and reconstructive procedures.

Purpose of the Study:

To investigate human ear shape variations based on age, sex, and ethnicity.
To specifically analyze factors contributing to ear prominence.

Main Methods:

Anthropometric measurements of 420 volunteers, including ear dimensions and prominence angles.
Data analysis considering age, sex, and ethnic background (Indian, Caucasian, Afro-Caribbean).

Main Results:

Significant ethnic variations in ear size (length and width), with Indian ears being largest.
Ears generally increase in size with age.
No objective measurements reliably predicted subjective perceptions of ear prominence.

Conclusions:

Consistent trends in ear morphology exist across ethnic groups, ages, and sexes.
An objective method to define ear prominence could not be established.
The perception of prominent ears is subjective and should be based on personal aesthetic preference.