Medical Definition of RED NUCLEUS. : a nucleus of gray matter in the tegmentum of the midbrain on each side of the middle line that receives fibers from the cerebellum of the opposite side by way of the superior cerebellar peduncle and gives rise to fibers of the rubrospinal tract of the opposite side. a nucleus of gray matter in the tegmentum of the midbrain on each side of the middle line that receives fibers from the cerebellum of the opposite side by way of the superior cerebellar peduncle and gives rise to fibers of the rubrospinal tract of the opposite side.
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Matthew McConaughey's Lincoln Commercials Generate Lots of Buzz. Matthew McConaughey may be an Oscar winner but it is his commercials for a car company that are generating all the buzz. McConaughey, 44, who starred in 2011's âThe Lincoln Lawyer,â is now the pitchman for another Lincoln, the car company Lincoln Motors. âI've been driving a Lincoln since long before anybody paid me to drive one,â the Texas-born father-of-three says in one commercial.