Optic tract
From Psychology Wiki
Community portal · Tasks to do · News · Help
Clinical · Educational · Ind&Org · Other fields · Professional · Transpersonal · World
Assessment |
Biopsychology |
Comparative |
Cognitive |
Developmental |
Language
Personality |
Philosophy |
Research Methods |
Social |
Statistics
Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology
| Brain: Optic tract | ||
|---|---|---|
 | ||
| The left optic nerve and the optic tracts. | ||
| [[Image:|250px|center|]] | ||
| Latin | tractus opticus | |
| Gray's | subject #189 814 | |
| Part of | Visual system | |
| Components | ||
| Artery | ||
| Vein | ||
| BrainInfo/UW | hier-443 | |
| MeSH | [1] | |
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 of the thalamus.
[edit] Right vs. left
The relationships of the retinal fibers to the optic tracts are as follows:
| optic tract | temporal retinal fibers | nasal retinal fiber |
| right optic tract | from the right eye | from the left eye |
| left optic tract | from the left eye | from the right eye |
[edit] Pathology
A lesion in the left optic tract will cause right-sided homonomous hemianopsia.
[edit] Additional images
.jpg) Diagram of hippocampus |
 Schematic diagram of the primate lateral geniculate nucleus. |
 Superficial dissection of brain-stem. Ventral view. |
 Coronal section of brain through intermediate mass of third ventricle. |
 Hind- and mid-brains; postero-lateral view. |
 Scheme showing central connections of the optic nerves and optic tracts. |
 Base of brain. |
 Section of brain showing upper surface of temporal lobe. |
 Dissection showing the course of the cerebrospinal fibers. |
Human brainstem anterior view 2 description.JPG
Human brainstem anterior view |
| Sensory system - Visual system - edit |
|---|
| Eye | Optic nerve | Optic chiasm | Optic tract | Lateral geniculate nucleus | Optic radiation | Visual cortex |
I-IV: olfactory - optic - oculomotor - trochlear
V: trigeminal: trigeminal ganglion
V1: ophthalmic: lacrimal - frontal (supratrochlear, supraorbital) - nasociliary (long root of ciliary, long ciliary, infratrochlear, posterior ethmoidal, anterior ethmoidal) - ciliary ganglion (short ciliary)
V2: maxillary: middle meningeal - in the pterygopalatine fossa (zygomatic, zygomaticotemporal, zygomaticofacial, sphenopalatine, posterior superior alveolar)
in the infraorbital canal/infraorbital nerve (middle superior alveolar, anterior superior alveolar)
on the face (inferior palpebral, external nasal, superior labial, infraorbital plexus) - pterygopalatine ganglion (deep petrosal, nerve of pterygoid canal)
branches of distribution (palatine, nasopalatine, pharyngeal)
V3: mandibular: nervus spinosus - medial pterygoid - anterior (masseteric, deep temporal, buccal, lateral pterygoid)
posterior (auriculotemporal, lingual, inferior alveolar, mylohyoid, mental) - otic ganglion - submandibular ganglion
VI: abducens
VII: facial: nervus intermedius - geniculate - inside facial canal (greater petrosal, nerve to the stapedius, chorda tympani)
at exit from stylomastoid foramen (posterior auricular, digastric - stylohyoid)
on face (temporal, zygomatic, buccal, mandibular, cervical)
VIII: vestibulocochlear: cochlear (striae medullares, lateral lemniscus) - vestibular
IX: glossopharyngeal: fasciculus solitarius - nucleus ambiguus - ganglia (superior, petrous) - tympanic - carotid sinus
X: vagus: ganglia (jugular, nodose) - Alderman's nerve - in the neck (pharyngeal branch, superior laryngeal ext and int, recurrent laryngeal)
in the thorax (pulmonary branches, esophageal plexus) - in the abdomen (gastric plexuses, celiac plexus, gastric plexus)
XI: accessory XII: hypoglossal
| This page uses content from the English-language version of Wikipedia. The original article was at Optic tract. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License. |
