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Related Concept Videos

The Auditory Ossicles01:11

The Auditory Ossicles

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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.
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Anatomy of the Ear01:16

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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...
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Mitral Stenosis I: Introduction01:22

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Cardiovascular System Abnormal Findings II: Auscultation01:25

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Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
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Respiratory System Abnormal Finding II: Palpation and Auscultation01:31

Respiratory System Abnormal Finding II: Palpation and Auscultation

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In assessing respiratory abnormalities, palpation and auscultation are critical tools for detecting and interpreting various pathophysiological changes. These techniques provide insight into underlying disorders by evaluating tactile sensations and sounds produced by the respiratory system.
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Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

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IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
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Related Experiment Video

Updated: Jun 8, 2025

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
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[Middle Ear Malformations].

John Martin Hempel, Sophia Gantner

    Laryngo- Rhino- Otologie
    |November 4, 2024
    PubMed
    Summary
    This summary is machine-generated.

    Middle ear malformations (MEMs) are congenital anomalies affecting auditory function, occurring in 0.5-3% of conductive hearing loss cases. Early intervention and surgical planning are key for managing these diverse conditions.

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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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    Area of Science:

    • Otolaryngology
    • Developmental Biology
    • Genetics

    Background:

    • Middle ear malformations (MEMs) are congenital anomalies impacting auditory function, present in 0.5-3% of conductive hearing loss cases.
    • These malformations can stem from genetic and environmental factors, often appearing unilaterally, isolated, or syndromic, and are linked to external and sometimes inner ear anomalies.

    Purpose of the Study:

    • To provide a comprehensive overview of middle ear malformations (MEMs).
    • To discuss the embryological basis, clinical implications, and management strategies for MEMs.

    Main Methods:

    • Review of embryological development of the middle ear from pharyngeal arches.
    • Analysis of clinical presentation, diagnostic imaging (high-resolution CT), and surgical interventions.
    • Discussion of audiological assessments and hearing rehabilitation.

    Main Results:

    • MEMs arise from disruptions in the development of structures like the tympanic membrane, ossicles, and Eustachian tube.
    • Effective management necessitates a multidisciplinary approach with early intervention for hearing loss.
    • Surgical options range from traditional tympanoplasty and stapesplasty to advanced active middle ear implants.

    Conclusions:

    • MEMs are heterogeneous congenital anomalies with varied causes and significant clinical impact.
    • Understanding embryology, genetics, and surgical techniques is vital for improving patient outcomes.
    • Multidisciplinary care and timely interventions are crucial for addressing hearing deficits associated with MEMs.