Papilledema pathophysiology: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
==Overview== | ==Overview== | ||
==Pathophysiology== | ==Pathophysiology== | ||
* [[Optic nerve]] sheath is continuous with the [[subarachnoid space]] of the [[brain]] and is regarded as an extension of the [[central nervous system]]. | |||
The fibers of the [[Ganglion cell|retinal ganglion cell]]s of the optic disc become engorged and bulge anteriorly. | * The brain itself is relatively spared from pathological consequences of high pressure. | ||
* [[Increased intracranial pressure]] is transmitted through to the optic nerve via this [[optic nerve]] sheath. | |||
* The anterior end of the [[optic nerve]] stops abruptly at the eye. Hence the pressure is asymmetrical and this causes a pinching and protrusion of the optic nerve at its head. | |||
* The fibers of the [[Ganglion cell|retinal ganglion cell]]s of the optic disc become engorged and bulge anteriorly. | |||
* Persistent and extensive [[optic nerve]] head swelling, or [[optic disc]] edema, can lead to loss of these fibers and permanent visual impairment. | |||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
Revision as of 17:57, 17 July 2012
|
Papilledema |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
Papilledema pathophysiology On the Web |
|
American Roentgen Ray Society Images of Papilledema pathophysiology |
|
Risk calculators and risk factors for Papilledema pathophysiology |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-In-Chief:Kalsang Dolma
Overview
Pathophysiology
- Optic nerve sheath is continuous with the subarachnoid space of the brain and is regarded as an extension of the central nervous system.
- The brain itself is relatively spared from pathological consequences of high pressure.
- Increased intracranial pressure is transmitted through to the optic nerve via this optic nerve sheath.
- The anterior end of the optic nerve stops abruptly at the eye. Hence the pressure is asymmetrical and this causes a pinching and protrusion of the optic nerve at its head.
- The fibers of the retinal ganglion cells of the optic disc become engorged and bulge anteriorly.
- Persistent and extensive optic nerve head swelling, or optic disc edema, can lead to loss of these fibers and permanent visual impairment.