Category: A
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Arcuate nucleus
The nucleus located on the basal aspect of the pyramid of the medulla.
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Anterior nucleus of the thalamus
A nucleus located in the rostral part of the thalamus. It receives the fibers of the mamillothalamic tract.
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Amygdaloid nucleus
A nucleus projecting into the inferior cornua of the lateral ventricle. It is part of the basal ganglia.
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Ambiguous nucleus
The nucleus of the glossopharyngeal and vagus nerves in the medulla oblongata. It lies in the lateral half of the reticular formation.
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Aortic notch
The notch in a sphygmogram caused by rebound at the aortic valve closure.
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Antegonial notch
A depression in the inferior border of the mandible at the anterior edge of the insertion of the masseter muscle.
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Ambient noise
The total noise from all sources in a given environment.
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Nexus
A connection or link; a binding together. It is used to designate a bond between components of a group.
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Asymptomatic neurosyphilis
Neurosyphilis that is clinically occult. It is diagnosed by changes in spinal fluid.
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Auditory neuropathy
Impaired hearing resulting from an absence of auditory evoked potentials, despite the presence of normal cochlear hair cell structure and function.