colliculus

(redirected from Colliculi)
Also found in: Dictionary, Medical.

colliculus

[kə′lik·yə·ləs]
(anatomy)
Any of the four prominences of the corpora quadrigemina.
The anterolateral, apical elevation of the arytenoid cartilages.
(neuroscience)
The elevation of the optic nerve where it enters the retina.
References in periodicals archive ?
For example, are the colliculi sensitive to thiamine deficiency because of their relatively high metabolic rate (Landau et al.
Br- and Da-neurons are found in the retina, superior colliculi, lateral geniculate nucleus and visual cortex of mouse, cat, rabbit and monkey (Clarke & Ikeda, 1985; De Valois & De Valois, 1975; Evtikhin, Polianskii, Alymkulov, & Sokolov, 2008; Jung, 1973; Pang, Gao, & Wu, 2003; Poggio, Baker, Lamarre & Sanseverino, 1969; Polianskii, Evtikhin, & Sokolov, 2005; Polianskii, Evtikhin, Sokolov, & Alymkulov, 2006; Polianskii, Alymkulov, Evtikhin, & Sokolov, 2008; Sokolov, 2003; Valberg & Seim, 2008) (See figure 1).
The osseous component of the MMOLC is the medial malleolus, which is composed of the anterior and posterior colliculi separated by the intercollicular groove.
Structures arising from the mesencephalon are the superior and inferior colliculi of the tectum, cerebral peduncles, optic lobes, optic tectum, tegmentum and somatic motor neurons of cranial nerves III and IV.
The largest axis of the colliculi in the human measures 10-12 mm, from the front to the outside, and the transverse axis just 7-8 mm, whereas in the spider monkey the superoinferior diameter of the superior colliculi was 6.
Et cum hi omnes, qui per girum sunt, tam excelsi sint (61) quam nunquam me puto uidisse, tamen ipse ille (62) medianus (63), in quo descendit maiestas Dei, tanto altior esl omnibus illis ut, cum subissemus in illo (64), prorsus toti (65) iili (66) montes, quos excelsos uideramus, ita infra nos essent ac si (67) colliculi (68) permodici (69) essent, lllud sane satis (70) admirabile est et sine Dei gratia puto illud non esse ut, cum omnibus altior sit ille medianus (71), qui specialis Syna dicitur, id est in quo descendit maiestas Domini, tamen uideri non possit, nisi ad propriam (72) radicem illius ueneris, ante tamen quam eum subeas; nam posteaquam completo desiderio descenderis inde, et de contra illum uides, quod antequam subeas, facere non potest (73).
1998, 2005; Steriade, 2006) In Figure 3, the main collothalamic pathways are shown as relays from the colliculi 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.
Because the colliculi, unlike the cortex, have heavily monocular input, Posner and Rafal suggested that humans with left spatial neglect might recover contralesional orienting while wearing a right eye patch, thus decreasing input to the left colliculus.
The region designated as "brainstem" includes the midbrain, colliculi, pons, and medulla oblongata (but not cervical spinal cord), as well as the thalamus.
The tectum is formed by the superior colliculi which is related to the visual system and the inferior colliculi which are part of the auditory system.
It is a short, thick ligament that originates from a wide area between the anterior and posterior colliculi.
The face of the giant panda sign is produced as a result of high signal intensity in the tegmentum with preserved normal signal intensity in the red nuclei and lateral portion of the pars reticulata of the substantia nigra as well as hypointensity of the superior colliculi.