Search results
Results from the WOW.Com Content Network
There are also subtypes to occipital lobe seizures caused by the spread within the brain and where exactly the seizure is occurring in the occipital lobe, causing variation of symptoms. 1. Primary visual cortex - can cause visual hallucinations and visions, or blindness in a certain area or completely
Anton syndrome, also known as Anton-Babinski syndrome and visual anosognosia, is a rare symptom of brain damage occurring in the occipital lobe. Those who have it are cortically blind , but affirm, often quite adamantly and in the face of clear evidence of their blindness , that they are capable of seeing.
Occipital neuralgia is caused by damage to the occipital nerves, which can arise from trauma (usually concussive or cervical), physical stress on the nerve, repetitive neck contraction, flexion or extension, and/or as a result of medical complications (such as osteochondroma, a benign bone tumour).
Cortical blindness is the total or partial loss of vision in a normal-appearing eye caused by damage to the brain's occipital cortex. [1] Cortical blindness can be acquired or congenital, and may also be transient in certain instances. [2]
The name of the condition includes the word "posterior" because it predominantly, though not exclusively, affects the back of the brain (the parietal and occipital lobes). Common underlying causes are severely elevated blood pressure , kidney failure , severe infections , certain medications, some autoimmune diseases , and pre-eclampsia .
The majority of cases in the 2005 study were the result of bilateral lesions in the ventral occipital cortex. [2] It is unknown whether this was the result of bilateral lesions being more likely to produce color-loss symptoms, or if it was a sampling effect of patients with more severe brain trauma more often being admitted for treatment.
Posterior cerebral artery syndrome is a condition whereby the blood supply from the posterior cerebral artery (PCA) is restricted, leading to a reduction of the function of the portions of the brain supplied by that vessel: the occipital lobe, the inferomedial temporal lobe, a large portion of the thalamus, and the upper brainstem and midbrain.
While cortical blindness results from lesions to primary visual cortex, visual agnosia is often due to damage to more anterior cortex such as the posterior occipital and/or temporal lobe(s) in the brain. [2] There are two types of visual agnosia, apperceptive and associative. Recognition of visual objects occurs at two levels. At an ...