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colliculus

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
colliculus [kɒˈlɪkjʊləs]
n pl -li
(Life Sciences & Allied Applications / Anatomy) Anatomy a small elevation, as on the surface of the optic lobe of the brain
[New Latin]


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The researchers have recently discovered that activation of a primitive brain region, the deep layers of superior colliculus (DLSC), elicits defensive behaviours such as an exaggerated startle, hypervigilance, cowering, and escape.
For Anatomy students: Google: Super Colliculus, MicroSaccades, Vestibulo-Ocular-Reflex, and the Striatum, which includes the caudate, and is part of the Basal Ganglia.
Specifically, less PrPres was deposited in the posterior colliculus (region 2) in Syrian hamsters inoculated with brain homogenate from Chinese hamsters, and more PrPres was deposited in the thalamus (region 6) of Syrian hamsters inoculated with brain homogenate from Djungarian hamsters (Figure 6, panel A).
 
 
 
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