optic lobes
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optic lobes — Lateral extensions of the protocerebrum or nervous system for innervation of an eye … Dictionary of invertebrate zoology
optic chiasma — n the X shaped partial decussation on the undersurface of the hypothalamus through which the optic nerves are continuous with the brain called also optic chiasm * * * the X shaped structure formed by the two optic nerves, which pass backwards… … Medical dictionary
optic chiasm — optic commissure the X shaped structure formed by the two optic nerves, which pass backwards from the eyeballs to meet in the midline beneath the brain, near the pituitary gland (see illustration). Nerve fibres from the nasal side of the retina… … The new mediacal dictionary
optic nerve — Anat. either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain. See illus. under eye. [1605 15] * * * ▪ anatomy second cranial nerve, which carries sensory nerve impulses… … Universalium
optic neuritis — ▪ pathology inflammation of the optic nerve (the second cranial nerve). The inflammation causes a fairly rapid loss of vision in the affected eye (eye, human), a new blind spot (a scotoma, usually in or near the centre of the visual field) … Universalium
Optic nerve pathways — The left and right branches of the optic nerves join behind the eyes, just in front of the pituitary gland, to form a cross shaped structure called the optic chiasma. Within the optic chiasma, some of the nerve fibers cross. The fibers from the… … Medical dictionary
nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… … Universalium
Fish — are aquatic vertebrate animals that are typically ectothermic (previously cold blooded), covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in fresh water, with species being … Wikipedia
Mesencephalon — Infobox Brain Name = Mesencephalon Latin = mesencephalon GraySubject = 188 GrayPage = 800 Caption = Inferior view mesencephalon (2), above (3) Caption2 = Human brainstem mesencephalon (B) IsPartOf = Components = Artery = Vein = BrainInfoType =… … Wikipedia
cranial nerves — *** The following format is used: Nerve Motor (M) or Sensory (S) Origin Function 0 Terminal (Preoptic) S Telencephalon; ventral border of olfactory bulb Smell? and sensory endings of snout I Olfactory S Telencephalon; anterior end of olfactory… … Dictionary of ichthyology
