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the floor of the fourth ventricle of the brain, formed by the ventricular surface of the rhombencephalon.
Synonym(s): fossa rhomboidea [TA]
Farlex Partner Medical Dictionary © Farlex 2012
rhomboid fossaThe rhomboid-shaped anterior floor of the 4th ventricle of the brain, which in turn forms the roof of the medulla oblongata and the pons. It is divided into a triangular superior part, horizontal intermediate part and triangular inferior part.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
rhom·boid fos·sa(rom'boyd fos'ă) [TA]
The floor of the fourth ventricle of the brain, formed by the ventricular surface of the rhombencephalon.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
In the brainstem, the floor of the fourth ventricle, which runs along the dorsal surface of the pons and part of the medulla.
See also: fossa
Medical Dictionary, © 2009 Farlex and Partners