colliculus

A small elevation above the surrounding parts. [L. mound, dim. of collis, hill]
- c. of arytenoid cartilage [TA] the elevation on the anterolateral surface of the arytenoid cartilage above the triangular fovea. SYN: c. cartilaginis arytenoideae [TA].
- c. cartilaginis arytenoideae [TA] SYN: c. of arytenoid cartilage.
- facial c. [TA] prominent portion of the medial eminence, just rostral to the medullary striae in the rhomboidal fossa; it is formed by the internal genu of the facial nerve and the abducens nucleus around which the facial fibers curve. SYN: c. facialis [TA], abducens eminence, eminentia abducentis, eminentia facialis, facial eminence, facial hillock.
- c. facialis [TA] SYN: facial c..
- c. inferior [TA] SYN: inferior c..
- inferior c. [TA] the ovoid, paired, inferior eminence of the laminae of mesencephalic tectum; it receives the lateral lemniscus and projects by way of the brachium of inferior c. to the medial geniculate body of the thalamus, and is thus an essential way-station in the central auditory pathway. SYN: c. inferior [TA], corpus quadrigeminum posterius, inferior nasal c., posterior quadrigeminal body.
- inferior nasal c. SYN: inferior c..
- seminal c. [TA] an elevated portion of the urethral crest upon which open the two ejaculatory ducts and the prostatic utricle. SYN: c. seminalis [TA], c. urethralis, seminal hillock, verumontanum.
- c. seminalis [TA] SYN: seminal c..
- superior c. [TA] the paired, larger, rounded anterior eminence of the laminae of mesencephalic tectum; major afferent connections of the superficial layers are the retina and striate cortex; input to deep layers of the c. are polymodal. Its efferent connections are with the lower brainstem and spinal cord (tectobulbar tract and tectospinal tract) and with the pulvinar and other cell groups in the caudal part of the thalamus; participates in extrageniculate visual pathway. The layers of the superior c. from superficial to deep are: zonal layer (stratum zonale), superficial gray layer (stratum griseum superficial), optic layer (stratum opticum), intermediate gray layer (stratum griseum intermedium), intermediate white layer (stratum medullare intermedium), deep gray layer (stratum griseum profundum), deep white layer (stratum medullare profundum). SYN: c. superior [TA], anterior quadrigeminal body, corpus quadrigeminum anterius.
- c. superior [TA] SYN: superior c..
- c. urethralis SYN: seminal c..

* * *

col·lic·u·lus kə-'lik-yə-ləs n, pl -u·li -.lī, -lē an anatomical prominence esp any of the four prominences constituting the corpora quadrigemina see INFERIOR COLLICULUS, SUPERIOR COLLICULUS

* * *

n. (pl. colliculi)
a small protuberance or swelling. Two pairs of colliculi, the superior and inferior colliculi, protrude from the roof of the midbrain (see tectum).

* * *

col·lic·u·lus (kə-likґu-ləs) pl. collicґuli [L.] a small elevation or mound.

Medical dictionary. 2011.

Look at other dictionaries:

  • Colliculus — (Latin for mound ) can refer to: Anatomy Midbrain Inferior colliculus, the principal midbrain nucleus of the auditory pathway Superior colliculus, a paired structure that forms a major component of the vertebrate midbrain Collicular arteries,… …   Wikipedia

  • Colliculus — bzw. Colliculi (Pl.) steht für: Colliculi inferiores, anatomische Struktur im Mittelhirn Colliculi superiores, anatomische Struktur im Mittelhirn Diese Seite ist eine Begriffsklärung zur Unterscheidung mehrerer mit …   Deutsch Wikipedia

  • colliculus — noun A small elevation …   Wiktionary

  • Colliculus — Colli̱culus [Verkleinerungsbildung zu lat. collis = Hügel] m; , ...li: kleiner Hügel, kleine Erhebung (Anat.). Colli̱culus facia̱|lis: kleine Vorwölbung in der Mitte der ↑Eminentia medialis der ↑Medulla oblongata (wird gebildet durch den… …   Das Wörterbuch medizinischer Fachausdrücke

  • colliculus — [kə lɪkjʊləs] noun (plural colliculi lʌɪ, li:) Anatomy any of a number of small swellings in the roof of the midbrain, involved in vision and hearing. Derivatives collicular adjective Origin C19: from L., dimin. of collis hill …   English new terms dictionary

  • colliculus — col·lic·u·lus …   English syllables

  • colliculus — n.; pl. colliculi a small protuberance or swelling. Two pairs of colliculi, the superior and inferior colliculi, protrude from the roof of the midbrain (see tectum) …   The new mediacal dictionary

  • colliculus — …   Useful english dictionary

  • Colliculus supérieur — Colliculus Description anatomique des colliculus Les colliculus ou tubercules quadrijumeaux sont des masses arrondies de l encéphale humain. Ils sont au nombre de quatre : deux antérieurs, deux postérieurs. Ils se situent entre le cervelet… …   Wikipédia en Français

  • Collicŭlus seminalis — (Samenhügel, Anat.), Ausmündungsstelle der Samengänge in der Harnröhre, s. Hahnenkopf …   Pierer's Universal-Lexikon

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.