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Doctor insights on: Afferent Pupillary Defects

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What is afferent pupillary defect?

What is afferent pupillary defect?

Marcus-Gunn pupil: An afferent pupillary defect indicates a lesion in the afferent limb (retina or optic nerve) of the pupillary reflex. Such a lesion is best appreciated on the "swinging flashlight test." a lesion in the left optic nerve will decrease the perceived illumination in that eye, and when the flashlight is swung from the right to the left eye, the left pupil will appear to dilate slightly. ...Read more

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Mechanism of symmetrical ascending paralysis development?

Mechanism of symmetrical ascending paralysis development?

Beyond scope: We're allowed 400 characters at this site. I ecommend webmd.Com for the depth tha to are apparently looking for. ...Read more

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Are ?Congenital heart disease related to a faulty signal transduction pathway?

Are ?Congenital heart disease related to a faulty signal transduction pathway?

Not likely.: Most congenital cardiac defects are due to multifactorial inheritance and environmental factors such as Folic Acid deficiency. I am not aware of specific studies linking them to a faulty signal transduction pathway, although such mechanisms frequently become the final common pathway of multiple etiological pathogenic factors. ...Read more

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Enlarged perivascular space in basal ganglia. Is by any cranial nerves? Double vision, enlarged pupils, trigeminal neuralgia, pulsating tinnitus

Enlarged perivascular space in basal ganglia. Is by any cranial nerves? Double vision, enlarged pupils, trigeminal neuralgia, pulsating tinnitus

Neurologic issues: None of what you describe is normal. I would suggest that you seek the opinion of both the Neurologist and the Neurosurgeon and possibly the Interventional Neuroradiologist. ...Read more

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Role of brimonidine in anterior ischemic optic neuropathy?

Role of brimonidine in anterior ischemic optic neuropathy?

Questionable: Some think that it can help increase blood flow to the optic nerve but this has not been proven. But will not hurt. ...Read more

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Why isn't congenital optic atrophy optical nerve not developed?

Why isn't congenital optic atrophy optical nerve not developed?

Most idiopathic: Most cases do not have a cause. Some cases are associated with CNS (brain problems such as genetic or idiopathic causes), some are genetic such as leber's disease and rarely can be due to maternal diabetes and drug use. ...Read more

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What's the difference between strabismus & cranial nerve palsies that effect the eyes? Can cranial nerve palsies cause strabismus?

What's the difference between strabismus & cranial nerve palsies that effect the eyes? Can cranial nerve palsies cause strabismus?

Different patterns: Strabismus is the generic term for eye misalignment of any cause. If from childhood, the eyes are separated about the same in all positions. If from cranial palsy, the degree of separation goes from normal away from the action of the muscles, to a very wide difference in the direction of the action of that muscle. An ophthalmologist can usually readily make this distinction. ...Read more

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What produces blindness in the peripheral visual field of each eye's temporal hemiretinal half?

What produces blindness in the peripheral visual field of each eye's temporal hemiretinal half?

Hemi-field loss: Is usually due to a pathology posterior (behind) to the eye itself. A lesion or area of pathology will usually be located from the area of the pituitary gland (approx. just forward of central brain) where the optic nerves cross to anywhere along the optic radiation ending at the occipital lobe (portion of the brain at the lower back of the skull). An MRI or CT can usually identify the cause. ...Read more

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Do optic pathway gliomas cause visual loss?

Do optic pathway gliomas cause visual loss?

Yes.: And depending on location and size, and patient age, resection or raditherapy can be used to maintain vision, or retard progressive visual loss. ...Read more

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What are the complications involving reflex sympathetic dystrophy?

What are the complications involving reflex sympathetic dystrophy?

Several: Reflex sympathetic dystrophy needs to be aggressively treated.The complications are loss of range of motion, atrophy of skin, bone and muscles, loss of use, contractures, disability,and permanent pain. ...Read more

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Will an interventricular septal defect automatically cause overriding of the aorta?

Will an interventricular septal defect automatically cause overriding of the aorta?

No.: There are many different types of ventricular septal defects (vsd). The only one associated with an overriding aorta is in the syndrome of tetrology of fallot. ...Read more

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Low-lying cerebellum or chiari accompany tonic pupil?

Low-lying cerebellum or chiari accompany tonic pupil?

Tonic pupil: Chiari malformation can cause tonic pupil. You need to see an eye doctor and a neurologist to rule out other causes though. ...Read more

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Could the oxygenation of my brain affected before asd(atrial septal defect)closure?

Could the oxygenation of my brain affected before asd(atrial septal defect)closure?

Not usually: An ASD does not generally affect oxygen delivery to the brain (or the rest of the body). The only exception would be in the setting of severe pulmonary artery hypertension in which low oxygenated blood can flow from the right atrium into the left atrium and be pumped to the body. ...Read more

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Are visual field defects present in glaucoma?

Are visual field defects present in glaucoma?

Yes: By definition, glaucoma is a group of diseases which causes characteristic optic nerve damage with corresponding visual field defects. These defects are not always symptomatic to the patient and may only be detectable through special testing. ...Read more

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In open angle glaucoma is optic atrophy a symptom of glaucoma attacking the central vision?

In open angle glaucoma is optic atrophy a symptom of glaucoma attacking the central vision?

Glaucoma: when glaucoma attacks the optic nerve the initial loss is usually peripheral vision. If not controled the loss will increase and proceed to involve the central vision. ...Read more