Willis, Thomas

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Willis, Thomas

Brit. anatomist, 1621–1675.
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CIRCLE OF WILLIS: Inferior view of brain

circle of Willis

An arterial anastomosis that encircles the optic chiasm and hypophysis, from which the principal arteries supplying the brain are derived. It receives blood from the two internal carotid arteries and the basilar artery formed by union of the two vertebral arteries. See: illustration

Willis cord

One of the cords crossing the superior longitudinal sinus transversely.

Willis pancreas

An obsolete term for the lesser pancreas.
Medical Dictionary, © 2009 Farlex and Partners


Thomas, English physician, 1621-1675.
accessorius willisii - nerve that arises by two sets of roots: cranial, emerging from the side of the medulla, and spinal, emerging from the ventrolateral part of the first five cervical segments of the spinal cord. Synonym(s): accessory nerve
chordae willisii - Synonym(s): Willis cords
circle of Willis - an anastomotic circle of arteries at the base of the brain. Synonym(s): arterial circle of cerebrum
Willis centrum nervosum - the largest and highest group of prevertebral sympathetic ganglia, located on the superior part of the abdominal aorta. Synonym(s): celiac ganglia
Willis cords - several fibrous cords crossing the superior sagittal sinus. Synonym(s): chordae willisii
Willis pancreas - a portion of the head of the pancreas formed by the superior mesenteric artery and abdominal aorta. Synonym(s): uncinate process of pancreas
Willis paracusis - the apparent increase in auditory acuity of a deaf person to conversation in noisy surroundings due to a companion's unconscious voice raising. Synonym(s): false paracusis
Willis pouch - obsolete term for lesser omentum.
Medical Eponyms © Farlex 2012
References in periodicals archive ?
Southern Marine LLC, led by Samuel Landers, Ricky Willis, Thomas Tarver and Tony Willis, obtained the six-month loan from Horizon Bank of Columbia County in Magnolia.
WASPS: Willie Le Roux; Christian Wade, Elliot Daly, Jimmy Gopperth, Josh Bassett; Danny Cipriani, Dan Robson; Matt Mullan, Tom Cruse, Jake Cooper-Woolley; Joe Launchbury (c), Kearnan Myall; Jack Willis, Thomas Young, Guy Thompson.
Wasps: Willie Le Roux; Christian Wade, Juan De Jongh, Kyle Eastmond, Josh Bassett; Danny Cipriani, Dan Robson; Simon McIntyre, Tom Cruse, Jake Cooper-Woolley; James Gaskell (c), Kearnan Myall; Jack Willis, Thomas Young, Guy Thompson.
LINE-UPS: Wasps: Willie Le Roux; Christian Wade, Juan De Jongh, Kyle Eastmond, Josh Bassett; Danny Cipriani, Joe Simpson; Simon McIntyre, Tom Cruse, Marty Moore; Joe Launchbury (c), James Gaskell; Jack Willis, Thomas Young, Nizaam Carr.