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A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.
Head Mirror with head band: to focus light into the cavity under inspection; mirror is concave and is used with a Chiron lamp to produce a parallel beam of light; doctor views through the hole (average diameter of mirror is 3 & 1/2" & that of hole is 1/4") Head mounted lights with head band: to focus light into the cavity under inspection ...
Anterolateral view of head and neck (supraclavicular fossa labeled at center right) ... Additional images ... Diagram at droid.cuhk.edu.hk
During a prodrome period, the Mayo Clinic and American Migraine Foundation say you might experience: Gastrointestinal changes, such as diarrhea or constipation Food cravings, especially for sweet ...
The head rests on the top part of the vertebral column, with the skull joining at C1 (the first cervical vertebra known as the atlas). The skeletal section of the head and neck forms the top part of the axial skeleton and is made up of the skull, hyoid bone, auditory ossicles, and cervical spine. The skull can be further subdivided into:
Image at umich.edu - must rollover; Lymphatic drainage and fascial planes in the neck; Diagram at Baylor College of Medicine; Non-Hodgkin's Lymphoma | Symptoms and Types; Neck, Cervical Metastases, Detection: Overview, Anatomy of the Cervical Lymphatics, Classification of Cervical Node Groups
A routine for your head and neck. The neck is a common area in which to develop pain from desk work. Looking at a computer monitor, we often jut our neck forward rather than tucking in our chin ...
The occipital lymph nodes, one to three in number, are located on the back of the head close to the margin of the trapezius and resting on the insertion of the semispinalis capitis. Their afferent vessels drain the occipital region of the scalp , while their efferents pass to the superior deep cervical glands .