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The cracking sound comes from tiny air bubbles within the synovial fluid—the lubricating fluid surrounding the joints—popping from pressure changes during the bending or stretching of the joints.
Crepitus is "a grating sound or sensation produced by friction between bone and cartilage or the fractured parts of a bone". Various types of crepitus that can be heard in joint pathologies are: Bone crepitus: This can be heard when two fragments of a fracture are moved against each other.
Chest X-rays may show air in the mediastinum, the middle of the chest cavity. [5] A significant case of subcutaneous emphysema can be detected by touching the overlying skin, which will feel like tissue paper or Rice Krispies. [8] Touching the bubbles causes them to move and sometimes make a crackling noise. [9]
The terminology of rales and rhonchi in English remained variable until 1977, when a standardization was established by the American Thoracic Society and American College of Chest Physicians. [6] As a result, the term râles was abandoned, and crackles became its recommended substitute.
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Researchers said on Wednesday they have settled the issue of what occurs inside knuckles to trigger the familiar popping sound. Snap, crackle, pop: study reveals secret behind knuckle-cracking ...
Joint cracking is the manipulation of joints to produce a sound and related "popping" sensation. It is sometimes performed by physical therapists, chiropractors, and osteopaths [1] pursuing a variety of outcomes. The cracking of joints, especially knuckles, was long believed to lead to arthritis and other joint problems. However, this has been ...
Respiratory sounds, also known as lung sounds or breath sounds, are the specific sounds generated by the movement of air through the respiratory system. [1] These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope as well as from the spectral characteristics of lung sounds. [2]