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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]
A further assumption is that a low levels of serotonin can causes spasms in the cervical area. [1] A plausible explanation for the cricopharyngeal spasms is a lack of neurotransmitter preventing the central nervous system from detecting that the eosophagus is closed, so that the upper esophagus sphincter becomes, randomly, hypertonic.
Some individuals can voluntarily produce this rumbling sound by contracting the muscle. According to the National Institute of Health, "voluntary control of the tensor tympani muscle is an extremely rare event", [ 5 ] where "rare" seems to refer more to the scarcity of test subjects and/or studies than the percentage of the general population ...
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Middle ear myoclonus occurs in the muscles of the middle ear. These muscles may include the tensor tympani and stapedius muscles. It can involve the muscles surrounding the Eustachian tube, which include the tensor veli palatini, levator veli palatini, and salpingopharyngeus. Those affected describe it as a thumping sound or sensation in the ear.
Symptoms include aural fullness, ears popping, a feeling of pressure in the affected ear(s), a feeling that the affected ear(s) is clogged, crackling, ear pain, tinnitus, autophony, and muffled hearing.
Laryngospasm is characterized by involuntary spasms of the laryngeal muscles. It is associated with difficulty or inability to breathe or speak, retractions, a feeling of suffocation, which may be followed by hypoxia-induced loss of consciousness. [2] It may be followed by paroxysmal coughing and in partial laryngospasms, a stridor may be heard ...
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