tectal การใช้

• The contribution of the thalamus to vestibular or to tectal functions is almost ignored.
• These and other experiments suggest that prey selectivity results from pretecto-tectal influences.
• The parabigeminal nucleus plays a very important role in tectal function that is described below.
• Here, the apparent lack of the spatial rule, further differentiates cortical and tectal multisensory neurons.
• The adjective form " tectal " is commonly used for mammals as well as other vertebrates.
• For example, in optical tectal neurons, dendrite arbor growth occurs approximately at the onset of retinal input.
• In Wernicke's this occurs specifically in the mamillary bodies, medial thalami, tectal plate, and periaqueductal areas.
• Previously only projections to the midbrain ( pre-tectal nucleus ) and hypothalamus ( suprachiasmatic nucleus ) had been shown.
• Sperry concluded that each individual optic nerve and tectal neuron used some form of chemical marker which dictated their connectivity during development.
• Focal brain stem tumours that arise at the top back of the midbrain ( tectal gliomas ) are managed conservatively, without surgical removal.
• The general function of the tectal system is to direct behavioral responses toward specific points in egocentric ( " body-centered " ) space.
• Previously only projections to the midbrain ( pre-tectal nucleus ) and hypothalamus ( supra-chiasmatic nuclei, SCN ) had been shown.
• The discharge patterns of prey-selective tectal neurons in response to prey objects  in freely moving toads  " predicted " prey-catching reactions such as snapping.
• It is suggested that the selectivity of tectal prey feature detectors, type T5.2, is determined by inhibitory influences of pretectal anti-worm detectors of the type TH3.
• The superficial layers receive input mainly from the retina, vision-related areas of the cerebral cortex, and two tectal-related structures called the pretectum and " parabigeminal nucleus ".
• The basal ganglia in amphibians is very important in receiving visual, auditory, olfactory, and mechansensory inputs; the disinhibitory striato-protecto-tectal pathway is important in prey-catching behaviors of amphibians.
• Thus, the tectum-Ipc-Imc circuit causes tectal activity to produce recurrent feedback that involves tightly focused excitation of a small column of neighboring tectal neurons, together with global inhibition of distant tectal neurons.
• Thus, the tectum-Ipc-Imc circuit causes tectal activity to produce recurrent feedback that involves tightly focused excitation of a small column of neighboring tectal neurons, together with global inhibition of distant tectal neurons.
• Thus, the tectum-Ipc-Imc circuit causes tectal activity to produce recurrent feedback that involves tightly focused excitation of a small column of neighboring tectal neurons, together with global inhibition of distant tectal neurons.
• These and other experiments suggest that pathways, involving axons of type TH3 cells, extend from the pretectal thalamus to the tectum, suitable to modulate tectal responses to visual stimuli and to determine prey-selective properties due to inhibitory influences.