The neural pathway of the menace reflex comprises the colliculi of the midbrain passing from the optic tract to accessory nuclei, and thence to the spinal cord and lower motor neurones that innervate the head, neck, and body muscles affected by the reflex.
32.
The mechanism behind the regeneration observed in these hamster graft nerve tissue to the optic tract and resulted in complications ( leg disabilities in the case of sciatic nerve grafts, for instance ), nano neuro knitting has been shown to promote the regeneration of these tissues without such drawbacks.
33.
The two optic nerves come together behind the eyes at the optic chiasm, where about half of the fibers from each eye cross over to the opposite side and join fibers from the other eye representing the corresponding visual field, the combined nerve fibers from both eyes forming the optic tract.
34.
The "'anterior perforated substance "'is an irregularly quadrilateral area in front of the optic tract and behind the olfactory trigone, from which it is separated by the fissure prima; medially and in front, it is continuous with the subcallosal gyrus; it is bounded laterally by the lateral stria of the olfactory tract and is continued into the uncus.
35.
This crossing is an adaptive feature of frontally oriented eyes, found mostly in predatory animals requiring precise visual depth perception . ( Prey animals, with laterally positioned eyes, have little binocular vision, so there is a more complete crossover of visual signals . ) Beyond the optic chiasm, with crossed and uncrossed fibers, the optic nerves become optic tracts.
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