pretectal

pretectal

/pre·tec·tal/ (pre-tek´tal) located anterior to the tectum mesencephali.
References in periodicals archive ?
This is because of complete decussation of the optic nerve fibers at the optic chiasm and then again between the pretectal nucleus and the parasympathetic nucleus of cranial nerve III.
10) The pretectal nucleus of the optic tract, allied to the accessory optic system, provides the neural substrate for the asymmetry in laterally eyed animals (Figure 2a), in which stimulation of the nucleus of the optic tracts elicits OKN with slow phases to the side of the nucleus.
These differences mainly appeared in the cortex, the medial pretectal nucleus, the posterior commissure, the zona incerta and hypothalamic lateral area in which PrPSC deposition was more intense in cattle and sheep BSE-inoculated mice than in the SC-PS152-inoculated animals.
The effects of Cd seemed to extend to other areas of the brain, namely, the anterior part of the nucleus glomerulosus (NGa; Figure 2c) of the diencephalic pretectal region that is involved, via mesencephalic circuits, with the regulation of visual motor functions in teleosts (Kaslin and Panula 2001).
Even SGC and NGa of mesencephalic and pretectal areas, respectively, which are related to the modulation of multisensorial inputs (visual, acoustic, and electroreceptive signals), supplied perturbed dendritic spine formation and deformed soma in a fashion similar to that of mesencephalic trigeminal neurons of rodents exposed to Cd (Yoshida 2001).
Light-near dissociation can be caused by severe loss of afferent light input to both eyes, caused by damage to the retina or optic nerve pathways, or samage at the tectum of the midbrain, causing loss of pretectal light input to the Edinger-Westphal nucleus (part of the parasympathetic chain of pupillary innervation).
Some nerves leaving the eye do not synapse in the lateral geniculate nucleus (LGN) but travel on to the superior colliculus and pretectal nuclei.