Eccentric topic of the Week
Question 1.
1) Regarding the optic nerve:
A. False: It is located in the posterior fossa
B. False: Optic neuritis causes bitemporal hemianopia
C. True: Optic nerve sheath meningioma can produce proptosis of the globe
D. True: It originates from the ganglion cells in the retina
E. False: Leber's optic neuropathy is a form of tobacco-alcohol amblyopia
Answer:
The optic nerve (together with the olfactory nerve) is located in the supratentorial compartment. Optic neuritis or other lesions can cause a variety of monocular visual field defects, from scotomas to unilateral blindness. Leber's optic neuropathy is a heritable mitochondrial disorder that causes degeneration of retinal ganglion cells.*
*Fix JD. Development of the nervous system.High Yield Neuroanatomy, 2nd edition. Philadelphia: Lippincott Williams & Wilkins, 2000: 27.
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http://www.colenpublishing.com/
for more information.
C. True: Optic nerve sheath meningioma can produce proptosis of the globe
D. True: It originates from the ganglion cells in the retina
E. False: Leber's optic neuropathy is a form of tobacco-alcohol amblyopia
Answer:
The optic nerve (together with the olfactory nerve) is located in the supratentorial compartment. Optic neuritis or other lesions can cause a variety of monocular visual field defects, from scotomas to unilateral blindness. Leber's optic neuropathy is a heritable mitochondrial disorder that causes degeneration of retinal ganglion cells.*
*Fix JD. Development of the nervous system.High Yield Neuroanatomy, 2nd edition. Philadelphia: Lippincott Williams & Wilkins, 2000: 27.
Visit:
http://www.colenpublishing.com/
for more information.
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