FACTOID # 25: If you're tired of sitting in traffic on your way to work, move to North Dakota.
 
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Encyclopedia > Trapezoid body

The trapezoid body is part of the acoustic pathway. It is a bundle of fibers and cells in the pontine tegmentum. It consists of fibers arising from the cochlear nucleus. A collection of nerve cells inside forms a trapezoid nucleus. The superior olivary nucleus is situated on the dorsal surface of the trapezoid body. Most nerve fibers pass directly from the olivary nuclei to the inferior colliculus. The inferior colliculus is part of the brain that sits below the superior colliculus, above the trochlear nerve and at the base of the projection of the medial geniculate nucleus (MGN) and the lateral geniculate nucleus (LGN). ...


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Gray, Henry. 1918. Anatomy of the Human Body. Page 858 (701 words)
Fibers from the striæ medullares contribute to the trapezoid body, in addition it sends terminals or collaterals to and receives axons from the superior olivary nucleus, the nucleus of the trapezoid body, the lateral preolivary or semilunar nucleus and the mesial preolivary nucleus.
Axons from the large fusiform cells of the dorsal nucleus pass partly by way of the striæ medullares to the trapezoid body and lateral lemniscus and the nuclei associated with the former, and partly transversely beneath the inferior peduncle and spinal tract of the trigeminal to the trapezoid body.
The nucleus of the trapezoid body lies between the root fibers of the abducent nerve and the superior olivary nucleus.
trapezoid - HighBeam Encyclopedia (265 words)
trapezoid closed plane figure bounded by four line segments, or sides, two of which are parallel and two of which are nonparallel.
The parallel sides of a trapezoid are called bases and the nonparallel sides legs; in an isosceles trapezoid the legs are of equal length.
The median of a trapezoid is the line segment connecting the midpoints of the legs; it is parallel to the bases and equal to half the sum of their lengths.
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