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Related Concept Videos

Anatomy of the Ear01:16

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 Ossicles01:11

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...
Unrenewable Cells00:50

Unrenewable Cells

In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
Hearing01:31

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
Physical Assessment of the Respiratory Tract IV: Auscultation01:28

Physical Assessment of the Respiratory Tract IV: Auscultation

Auscultation is a crucial component of the physical assessment of the respiratory tract. It offers valuable insights into airflow through the bronchial tree and potential lung obstructions. This process involves careful listening to breath, voice, and adventitious sounds, which can reveal a wealth of information about a patient's respiratory health.
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.

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Related Experiment Video

Updated: Jun 20, 2026

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
06:59

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation

Published on: February 29, 2020

Ear defects.

David C Shonka1, Stephen S Park

  • 1Department of Otolaryngology-Head & Neck Surgery, University of Virginia Health System, Charlottesville, USA.

Facial Plastic Surgery Clinics of North America
|August 25, 2009
PubMed
Summary

The auricle's exposed position and complex shape make it vulnerable to sun damage and skin cancer. Reconstructing the ear is difficult due to its unique anatomy and contours. This study proposes a classification system for auricular defects based on anatomic location and tissue loss. The authors suggest that categorizing defects improves surgical outcomes. The system includes skin-only, composite, full-thickness, and total auricular loss defects. The upper third of the ear is a key region in classification. The authors propose an algorithm to guide surgical decisions. This system may improve surgical planning and outcomes. The study suggests that structured classification enhances consistency in auricular reconstruction.

Keywords:
auricular defectauricular reconstructionsurgical classificationear anatomy

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Published on: October 26, 2019

Area of Science:

  • Otolaryngology and head and neck surgery
  • Plastic and reconstructive surgery
  • Dermatologic surgery

Background:

The auricle's exposed position and complex shape make it vulnerable to sun damage and skin cancer. Prior research has shown that auricular reconstruction is difficult due to the ear's unique anatomy and contours. It was already known that skin-only injuries are common, but less understood is how to approach full-thickness or composite defects. No prior work had resolved the best classification system for these defects. That uncertainty drove the need for a structured approach to auricular repair. This gap motivated the development of a classification system based on anatomic location and tissue loss. The literature suggests that categorizing defects improves surgical planning and outcomes. No prior work had resolved a unified algorithm for auricular reconstruction.

Purpose Of The Study:

This study aims to organize auricular defects into distinct categories based on anatomic location and tissue loss. The authors propose a classification system to guide surgical repair decisions. The specific problem addressed is the lack of a standardized framework for auricular defect repair. The motivation stems from the challenges in reconstructing the ear's complex anatomy. The authors suggest that categorizing defects improves surgical outcomes. This approach allows for tailored treatment of skin-only, composite, or full-thickness defects. The study proposes an algorithm to streamline the decision-making process. The authors propose that this system may enhance consistency in auricular reconstruction.

Main Methods:

The authors reviewed auricular defects based on anatomic location and tissue loss. They categorized defects into skin-only, small composite, full-thickness, and total auricular loss. The classification system incorporates the upper third of the ear as a key region. The authors propose an algorithm to guide surgical decisions. No prior work had resolved a unified framework for auricular repair. The study uses a structured approach to differentiate defect types. The authors suggest that this system may improve surgical planning. The algorithm is based on the extent and location of tissue loss.

Main Results:

The authors propose a classification system for auricular defects based on anatomic location and tissue loss. Skin-only defects are distinct from composite or full-thickness defects. The upper third of the ear is a critical region in classification. The authors propose an algorithm to guide repair decisions. This system may improve surgical outcomes. The study suggests that categorizing defects enhances treatment planning. The authors suggest that this approach may reduce variability in reconstruction. The classification system includes total auricular loss as a distinct category.

Conclusions:

The authors propose a classification system for auricular defects based on anatomic location and tissue loss. This system may improve surgical outcomes by guiding treatment decisions. The authors suggest that categorizing defects enhances consistency in reconstruction. The upper third of the ear is a key region in classification. The algorithm proposed may streamline the decision-making process. The authors propose that this system may reduce variability in auricular repair. The study suggests that structured classification improves surgical planning. The authors propose that this approach may enhance outcomes for auricular defects.

The authors propose a classification system for auricular defects based on anatomic location and tissue loss.

The system includes skin-only, small composite, full-thickness, and total auricular loss defects.

The upper third is a critical region due to its unique anatomy and impact on reconstruction decisions.

The algorithm guides surgical decisions based on the extent and location of tissue loss.

The system includes skin-only, composite, full-thickness, and total auricular loss defects.

The authors suggest that structured classification may enhance consistency and surgical planning.