Information about Optic Radiation
| Brain: | ||
|---|---|---|
| Deep dissection of cortex and brain-stem. (Optic radiation labeled at center left.) | ||
| Latin | radiatio optica | |
| NeuroNames | ancil-529 | |
| Dorlands/Elsevier | r_01/12686139 | |
There is one such tract on each side of the brain.
Parts
A distinctive feature of the optic radiations is that they split into two parts on each side:| Source | Path | Information | Damage |
| Fibers from the inferior retina (also called "Meyer's loop" or "Archambault's loop") | must pass into the temporal lobe by looping around the inferior horn of the lateral ventricle. | Carry information from the superior part of the visual field | A lesion in the temporal lobe that results in damage to Meyer's loop causes a characteristic loss of vision in a superior quadrant (quadrantanopia.) |
| Fibers from the superior retina | travel straight back to the occipital lobe in the retrolenticular limb of the internal capsule to the visual cortex. | Carry information from the inferior part of the visual field | Taking the shorter path, these fibers are less susceptible to damage. |
)
Right superior quadrantanopia. The areas of the visual field lost in each eye are shown as black areas. This visual field defect is characteristic of damage to Meyer's loop on the left side of the brain.
Additional images
) Horizontal section of right cerebral hemisphere. | ) Diagram of the tracts in the internal capsule. | 3D schematic representation of optic tracts |
External links
- Optic+radiation at eMedicine Dictionary
Sensory system - Visual system |
|---|
| Eye • Optic nerve • Optic chiasm • Optic tract • Lateral geniculate nucleus • Optic radiation • Visual cortex • Blobs |
Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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NeuroNames is a system of nomenclature for the human and/or macaque brain.
It is maintained by the University of Washington and is a part of a tool called "BrainInfo". BrainInfo helps one identify structures in the brain.
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It is maintained by the University of Washington and is a part of a tool called "BrainInfo". BrainInfo helps one identify structures in the brain.
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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axon or nerve fiber, is a long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body or soma.
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Anatomy
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An interneuron (also called relay neuron, association neuron or bipolar neuron) is a term used to describe a neuron which has two different common meanings.
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The lateral geniculate nucleus (LGN) of the thalamus is a part of the brain, which is the primary processor of visual information, received from the retina, in the central nervous system.
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For the computer game developer, see Thalamus Ltd.
The thalamus (from Greek θάλαμος = bedroom, chamber, IPA= /ˈθæləməs/) is a pair and symmetric part of the brain.
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The term visual cortex refers to the primary visual cortex (also known as striate cortex or V1) and extrastriate visual cortical areas such as V2, V3, V4, and V5.
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The calcarine fissure (or calcarine sulcus) is an anatomical landmark located at the very caudal end of the medial surface of the brain. It begins near the occipital pole in two converging rami and runs forward to a point a little below the splenium of the corpus callosum,
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In animals, the brain or encephalon (Greek for "in the skull"), is the control center of the central nervous system, responsible for behavior. The brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing,
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- For the moth genus, see Retina (moth).
The retina is a thin layer of neural cells that lines the back of the eyeball of vertebrates and some cephalopods. It is comparable to the film in a camera.
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The temporal lobes are part of the cerebrum. They lie at the sides of the brain, beneath the lateral or Sylvian fissure. Seen in profile, the human brain looks something like a boxing glove. The temporal lobes are where the thumbs would be.
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The lateral ventricles are part of the ventricular system of the brain. Classified as part of the telencephalon, they are the largest of the ventricles.
The lateral ventricles connect to the central third ventricle through the interventricular foramina of Monro.
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The lateral ventricles connect to the central third ventricle through the interventricular foramina of Monro.
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The term visual field is sometimes used as a synonym to field of view, though they do not designate the same thing. The visual field is the "spatial array of visual sensations available to observation in introspectionist psychological experiments" (J.
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In psychology, visual perception is the ability to interpret visible light information reaching the eyes which is then made available for planning and action. The resulting perception is also known as eyesight, sight or vision.
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Quadrantanopia (or quadrant anopia, as two words) refers to an anopia affecting a quarter of the field of vision.
It can be associated with a lesion of an optic radiation.
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It can be associated with a lesion of an optic radiation.
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The occipital lobe is the visual processing center of the mammalian brain, containing most of the anatomical region of the visual cortex. The primary visual cortex is Brodmann area 17, commonly called V1 (visual one).
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The internal capsule is an area of white matter in the brain that separates the caudate nucleus and the thalamus from the lenticular nucleus.
It consists of axonal fibres that run between the cerebral cortex and the pyramids of the medulla.
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It consists of axonal fibres that run between the cerebral cortex and the pyramids of the medulla.
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eMedicine is an online clinical medical knowledge base that was founded in 1996 by Scott Plantz and Richard Lavely, two medical doctors. It was sold to WebMD in January 2006.
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sensory system: in this case, vision, for the visual system. ]]
A sensory system is a part of the nervous system responsible for processing sensory information.
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A sensory system is a part of the nervous system responsible for processing sensory information.
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The visual system is the part of the nervous system which allows organisms to see. It interprets the information from visible light to build a representation of the world surrounding the body.
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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Optic Nerve may be a reference to:
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- Optic nerve, the anatomical structure;
- Optic Nerve (comic), the comic book series;
- Optic Nerve (1998), the seminal release from the Irish hip hop act known as Exile Eye; or
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The optic chiasm (Greek χίασμα, "crossing", from the Greek χλαζειν 'to mark with an X', after the Greek letter 'Χ', chi) is the part of the brain where the optic nerves partially cross.
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The optic tract is a part of the visual system in the brain.
It is a continuation of the optic nerve and runs from the optic chiasm (where half of the information from each eye crosses sides, and half stays on the same side) to the lateral geniculate nucleus.
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It is a continuation of the optic nerve and runs from the optic chiasm (where half of the information from each eye crosses sides, and half stays on the same side) to the lateral geniculate nucleus.
Right vs.
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The lateral geniculate nucleus (LGN) of the thalamus is a part of the brain, which is the primary processor of visual information, received from the retina, in the central nervous system.
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The term visual cortex refers to the primary visual cortex (also known as striate cortex or V1) and extrastriate visual cortical areas such as V2, V3, V4, and V5.
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Blobs are sections of the visual cortex where groups of neurons which are sensitive to color assemble in cylindrical shapes. They were first identified in 1979 by Margaret Wong-Riley when she used a cytochrome oxidase stain, from which they get their name.
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nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions. Prominent parts of a nervous system include neurons and nerves, which are used in coordination.
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sensory system: in this case, vision, for the visual system. ]]
A sensory system is a part of the nervous system responsible for processing sensory information.
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A sensory system is a part of the nervous system responsible for processing sensory information.
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