Category: M
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Mixed astigmatism
Astigmatism in which one meridian is myopic and the other hyperopic.
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Muscular asthenopia
Asthenopia caused by weakness of the extrinsic ocular muscles.
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Magnetic resonance arthrography
Imaging of joint diseases with magnetic resonance technologies, typically after the injection of a contrast agent into the affected joint.
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Muscular artery
A medium-sized artery with more smooth muscle than elastic tissue in the tunica media. Most named arteries are muscular arteries.
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Middle sacral artery
A branch of the abdominal aorta, supplying blood to the sacrum, coccyx, and buttocks.
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Middle cerebral artery
One of two paired arteries (right and left MCAs) that are primary branches of the internal carotid artery. They supply blood to the frontal, orbital, parietal, and temporal lobes of the brain. Strokes involving the dominant middle cerebral artery result in hemiparesis and aphasia.
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Maxillary arch
The curved composite structure of the natural dentition and supporting tissues of the upper jaw (maxillary and mandibular arch); the residual bony ridge after teeth have been lost from the upper jaw.
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Mandibular arch
The curved composite structure of natural dentition and supporting tissues of the mandible.
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Medicated aqua
An aqueous solution of a volatile substance. It usually contains only a comparatively small percentage of the active drug. Some of these solutions are merely water saturated with a volatile oil. They are used mostly as vehicles to give odor and taste to solutions.
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Motor apraxia
Inability to perform movements necessary to use objects properly, although the names and purposes of the objects are known and understood.