colliculus

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colliculus

 [kŏ-lik´u-lus] (pl. colli´culi) (L.)
1. a small elevation.
2. either of the two pairs of rounded eminences in the midbrain concerned with visual and auditory reflexes.
seminal colliculus a prominent portion of the male urethral crest, on which are the opening of the prostatic utricle and, on either side of it, the orifices of the ejaculatory ducts; called also verumontanum.

col·lic·u·lus

, pl.

col·lic·u·li

(ko-lik'yū-lŭs, -lī), [TA]
A small elevation above the surrounding parts.
[L. mound, dim. of collis, hill]

colliculus

/col·lic·u·lus/ (kah-lik´u-lus) pl. colli´culi   [L.] a small elevation.
seminal colliculus , colliculus semina´lis verumontanum; a portion of the male urethral crest on which are the openings of the prostatic utricle and the ejaculatory ducts.

col·lic·u·lus

, pl. colliculi (kŏ-lik'yū-lŭs, -lī) [TA]
A small elevation above the surrounding parts.
[L. mound, dim. of collis, hill]

col·lic·u·lus

, pl. colliculi (kŏ-lik'yū-lŭs, -lī) [TA]
Small elevation above surrounding parts.
[L. mound, dim. of collis, hill]

colliculus

pl. colliculi; a small elevation.

caudal colliculus
see midbrain colliculus (below).
midbrain colliculus
there are four colliculi in the tectum of the midbrain, two caudal (inferior) and two rostral (superior) containing the visual and auditory reflex centers. Called also corpora quadrigemina.
seminal colliculus, colliculus seminalis
a prominent portion of the male urethral crest, on either side of which, depending on the species, are the openings of the vasa deferens or ejaculatory ducts; called also verumontanum.
superior colliculus
see midbrain colliculus (above).
References in periodicals archive ?
This section type permitted observing the superior part of the mesencephalon, setting the profile of the cerebral peduncles and colliculi in evidence.
Aparece reforzado por per y a su vez modifica al diminutivo colliculi, evidenciando un uso de la reiteracion muy comun en el habla popular.
In Figure 4, the main collothalamic pathways are shown as relays from the colliculi (midbrain roof) to the thalamus; the visual and somatosensory/multisensory pathways are shown as running together from the superior colliculus, and the main auditory pathway is shown as running from the inferior colliculus.
They are thought to be caused by abnormal insertion of the mesonephric ducts into the cloaca in the place of the normal plicae colliculi, which cause varying degrees of obstruction.
However, in sCJD-infected mice, vacuolar lesions were mostly observed in the anterior parts of the brain (except the parietal cortex), whereas in mice infected with lemur-passaged L-BSE, the lesions were more widely distributed, involving the colliculi and the hypothalamus.
The function of the orientation network is to select sensory stimuli, and its activity is related to the posterior parietal cortex, the pulvinar nucleus of the thalamus and the superior colliculi (Posner & Raichle, 1994).
To do this, axons in the fascicular portion of the 4th nerve first travel in a posterior direction (ie opposite to the location of the orbit) around the edge of the PAG to emerge from the brainstem further posteriorly behind the inferior colliculi, having crossed the midline within the superior medullary velum, a thin sheet of tissue forming the superior border of the 4th ventricle between the upper pons and cerebellum.
Perhaps the influence of directed attention is carried out through additional descending circuits of saccade initiation from the cortical frontal oculomotor fields to the brainstem saccadic generator, bypassing the superior colliculi (Gaymard et al.
The region designated "brainstem" includes the midbrain, colliculi, pons, and medulla oblongata (but not cervical spinal cord), as well as the thalamus.
Classically in Wernicke encephalopathy prominent involvement of inferior colliculi and periaqueductal area are seen in diffusion weighted images(DWI).
In the other 3 orally inoculated animals, spongiosis was characterized by fewer vacuoles and was restricted to the striatum (Figure 2, panel B), thalamus, colliculi, and brainstem.
Visual inspection of these brains confirmed that the volume of cerebral cortex was reduced dramatically by a dose of 25 mg/kg, as indicated by the exposed dorsal surface of both inferior and superior colliculi (Figure 1).