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Related Concept Videos

Anatomy of the Ear01:16

Anatomy of the Ear

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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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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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The Cochlea01:13

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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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Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
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Updated: Nov 14, 2025

A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection
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An auricular division method based on ASM algorithm.

Junling Wen, Miao Jiang, Yihui Wang

    Technology and Health Care : Official Journal of the European Society for Engineering and Medicine
    |March 8, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new computerized method for automatically dividing auricular acupuncture point (AAP) subzones. This technique enhances the precision and efficiency of locating AAPs in traditional Chinese medicine.

    Keywords:
    Active shape modelTraditional Chinese medicineauricular acupuncture pointauricular divisionimage processing

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    Area of Science:

    • Traditional Chinese Medicine
    • Medical Imaging
    • Computational Anatomy

    Background:

    • Auricular acupuncture point (AAP) therapy is a key component of traditional Chinese medicine.
    • Accurate AAP location relies on precise auricular subzone division, a historically challenging task.

    Purpose of the Study:

    • To develop an automated method for dividing auricular subzones.
    • To overcome the difficulties associated with the precise localization of small anatomical areas on the auricle.

    Main Methods:

    • A novel method utilizing the active shape model algorithm was developed.
    • The method is based on the World Federation of Acupuncture-Moxibustion Societies (WFAS) standard for AAP naming and location.

    Main Results:

    • The proposed method successfully achieved automatic and efficient division of auricular subzones for AAP location.
    • Quantitative analysis showed low average Hausdorff (6.28 ± 0.50) and Euclid (6.67 ± 0.59) distances for landmark positioning compared to manual methods.

    Conclusions:

    • The developed automated method offers a significant advancement in AAP location.
    • This technique holds potential for improving therapeutic and educational applications of auricular acupuncture point therapy.