quadrigemina

quadrigemina

(kwod?ri-jem'in-a) [? + geminus, twin]
The corpora quadrigemina.
See: colliculus inferior; colliculus superior
Medical Dictionary, © 2009 Farlex and Partners

quadrigemina

Pertaining to the four bodies, the corpora quadrigemina, or colliculi, on the roof of the fourth ventricle of the midbrain. The upper pair of quadrigeminal bodies are concerned with visual tracking and the lower pair are associated with hearing.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
They supplied the corpora quadrigemina, the rostral and dorsal aspect of the cerebellar hemispheres as well as the vermis, and finally anastomosed with the caudal cerebellar arteries (Fig.
El mismo hecho ha de ser dicho de la corpora quadrigemina. A pesar de que los casos relacionados a este organo son mucho menos numerosos que el pasado, hay suficientes para probar que la decusacion de las fibras nerviosas, tienen que tener lugar enteramente antes de llegar a la base de la corpora quadrigemina.
Nothnagel, "On the diagnosis of diseases of the corpora quadrigemina," Brain, vol.
Chrysolina quadrigemina, a beetle intentionally imported from Australia in the 1940s, has battled Klamath weed (a.k.a.
They also showed that activities of superoxide dismutase, glutathione peroxidase (GPx) and glutathione reductase (GR) decreased significantly in hypothalamus, corpora quadrigemina and corpus striatum.
In De L'Intelligence (1870), Taine describes the self as nothing more than a "verbal entity," a "mental fiction" used "only for convenience of discourse." While people think in terms of 'self' or 'will,' the reality is "an internal movement in the grey substance of the protuberance of the corpora quadrigemina...; whatever it may be, it consists of a more or less complex and extensive displacement of molecules, and it is nothing more" (I: 205, 203, 188).
Of these, the beetle Chrysolina quadrigemina, while effective, does not do well in shaded areas and its success seems to be sporadic.
Mesencephalon: The marginal layer of each basal plate of mesencephalon enlarges and thickened forming the cerebral crura or peduncles (crura cerebri) while the alar plates of the mesencephalon give rise to the anterior and posterior colliculus which appear as two longitudinal elevations separated by a shallow midline depression (corpora quadrigemina) (Fig.