- 同
- bitemporal hemianopsia
WordNet
- blindness in one half of the visual field of one or both eyes (同)hemianopsia
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/11/17 14:09:02」(JST)
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Bitemporal hemianopsia |
Classification and external resources |
Specialty |
ophthalmology |
ICD-10 |
H53.4 |
ICD-9-CM |
368.47 |
Bitemporal hemianopsia (aka bitemporal heteronymous hemianopsia or bitemporal hemianopia) is the medical description of a type of partial blindness where vision is missing in the outer half of both the right and left visual field. It is usually associated with lesions of the optic chiasm, the area where the optic nerves from the right and left eyes cross near the pituitary gland.
Contents
- 1 Causes
- 2 Etymology
- 3 See also
- 4 External links
Causes
In bitemporal hemianopsia vision is missing in the outer (temporal or lateral) half of both the right and left visual fields. Information from the temporal visual field falls on the nasal (medial) retina. The nasal retina is responsible for carrying the information along the optic nerve, and crosses to the other side at the optic chiasm. When there is compression at optic chiasm the visual impulse from both nasal retina are affected, leading to inability to view the temporal, or peripheral, vision. This phenomenon is known as bitemporal hemianopsia. Knowing the neurocircuitry of visual signal flow through the optic tract is very important in understanding bitemporal hemianopsia.
Bitemporal hemianopsia most commonly occurs as a result of tumors located at the mid-optic chiasm. Since the adjacent structure is the pituitary gland, some common tumors causing compression are pituitary adenomas and craniopharyngiomas. Also another relatively common neoplastic etiology is meningiomas. An etiology of vascular origin is an aneurysm of the anterior communicating artery which arise superior to the chiasm, enlarge, and compress it from above.
Etymology
The absence of vision in half of a visual field is described as hemianopsia.
The visual field of each eye can be divided in two vertically, with the outer half being described as temporal, and the inner half being described as nasal.
"Bitemporal hemianopsia" can be broken down as follows:
- bi-: involves both left and right visual fields
- temporal: involves the temporal visual field
- hemi-: involves half of each visual field
- anopsia: blindness (formed by a(n) no + opsis vision + ia)
See also
- Binasal hemianopsia
- Homonymous hemianopsia
External links
- Case report of Bilateral Hemianopsia Due to Pituitary Adenoma. Clinical Cases and Images. at blogspot.com
- 1872363522 at GPnotebook
UpToDate Contents
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English Journal
- Stroke intervention for middle cerebral artery thrombus in a young patient with an ipsilateral Spetzler-Martin grade V arteriovenous malformation.
- Abla AA, Dumont TM, Kan P, Hopkins LN, Siddiqui AH, Levy EI.SourceDepartment of Neurosurgery and Toshiba Stroke Research Center, USA.
- Journal of neurointerventional surgery.J Neurointerv Surg.2012 Feb 19. [Epub ahead of print]
- A patient (in their late 20s) was admitted with a right frontal stroke, left hemiparesis and hemianopsia, and a National Institutes of Health Stroke Scale (NIHSS) score of 11. CT perfusion imaging revealed an ischemic penumbra. A CT angiogram showed a Spetzler-Martin grade V arteriovenous malformati
- PMID 22345144
- Acute, monocular vision loss from Rathke's cleft cyst.
- Bohnstedt BN, Patel NB, Hagen MC, Fulkerson DH.SourceDepartment of Neurosurgery, Indiana University School of Medicine, Indianapolis, Indiana, USA.
- Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia.J Clin Neurosci.2012 Feb 13. [Epub ahead of print]
- Rathke's cleft cysts are benign, non-neoplastic sellar lesions that are often asymptomatic. The rare patient with symptoms may present with pituitary dysfunction, headache, or visual problems. Visual deficits are generally consistent with a chiasmal syndrome as associated with other sellar lesions.
- PMID 22336223
Japanese Journal
- 頭蓋咽頭腫術後にHemifield Slide現象を示した1例
- Rathke's Cleft Cyst With Xanthogranulomatous Change
- MIYAJIMA Yoshiteru,OKA Hidehiro,UTSUKI Satoshi,FUJII Kiyotaka
- Neurologia medico-chirurgica = 神経外科 51(10), 740-742, 2011-10-15
- … Goldman's perimeter showed he had bitemporal hemianopia. …
- NAID 10029479400
- 高齢者に発生した視神経膠腫の1例 (視交叉神経膠腫)
- 深作 貞文,藤江 和貴,前原 忠行 [他],新井 一,若倉 雅登
- あたらしい眼科 = Journal of the eye 26(1), 121-126, 2009-01-30
- NAID 10026254119
Related Links
- Bitemporal hemianopsia (or Bitemporal hemianopia) is the medical description of a type of partial blindness where vision is missing in the outer half of both the right and left visual field. It is usually associated with lesions of the optic chiasm, ...
Related Pictures
![:Visual field bitemporal hemianopia.png](https://1mg.info/0/h/r/1583.jpg)
![Heteronymous bitemporal hemianopia (lesion](https://1mg.info/0/h/r/1584.jpg)
![-tOmOyO: tdg hitam bitemporal hemianopia](https://1mg.info/0/h/r/1585.jpg)
![in bitemporal hemianopia the lesion or](https://1mg.info/0/h/r/1586.jpg)
![Medical Students: Bitemporal hemianopia](https://1mg.info/0/h/r/1587.jpg)
★リンクテーブル★
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同名半盲、同名性半盲
- 関
- bitemporal hemianopia、bitemporal hemianopsia、hemianopia、hemianopsia、homonymous hemianopia、quadrantanopia、quadrantanopsia
- 同
- 同名性半盲
[★]
半盲
- 関
- bitemporal hemianopia、bitemporal hemianopsia、hemianopia、hemianopic、homonymous hemianopia、homonymous hemianopsia、quadrantanopia、quadrantanopsia
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四半盲、四分盲
- 関
- bitemporal hemianopia、bitemporal hemianopsia、hemianopia、hemianopsia、homonymous hemianopia、homonymous hemianopsia、quadrantanopia