"lateral wall and roof of the posterior horn of lateral ventricle; separated by the tapetum (Meyer’s Loop – inferior, central bundle – middle, posterior bundle – superior including roof)"
"lateral wall and roof of the posterior horn of lateral ventricle; separated by the tapetum (Meyer’s Loop – inferior, central bundle – middle, posterior bundle – superior including roof)"
"lateral wall and roof of the posterior horn of lateral ventricle; separated by the tapetum (Meyer’s Loop – inferior, central bundle – middle, posterior bundle – superior including roof)"
"occipital cortex lesions tend to cause homonymous hemianopias of variable size – with or without macular involvement; the MCA may supply the distal tip of the occipital lobe, corresponding to the macula"
"temporal lobe lesions are associated with memory, auditory, speech and vestibular disturbances, as well as seizures."
"Anterior bundle (Meyer loop)"
"ischaemic and haemorrhagic changes in perforating arteries branching from the MCA and PCA (lateral lenticulostriate, thalamogeniculate), as well as anterior choroidal artery territories, may cause field defects"
Expected headings
"Anterior bundle (Meyer loop)"
"Central bundle"
"Posterior bundle"
"Relations"
"Optic radiation damage"
"Vascular lesions"
"Neoplastic lesions"
"Inflammatory/degenerative conditions"
"Iatrogenic"
"This pathway is formed by the axons of neurones correlating to the contralateral visual field. For example, the left-sided radiations contain information from the left temporal and right nasal retina. Temporal fibres synapse at layers 2, 3 and 5 of the lateral geniculate nucleus, while nasal fibres at layers 1, 4, and 6. The inferior fibres of the optic radiation correlate with the superior visual field. M-type retinal ganglion cells synapse in layers 1 and 2, while P-type in 3-6."
"temporal lobe lesions are associated with memory, auditory, speech and vestibular disturbances, as well as seizures."
"lateral wall and roof of the posterior horn of lateral ventricle; separated by the tapetum (Meyer’s Loop – inferior, central bundle – middle, posterior bundle – superior including roof)"
"anterior +/- central bundle; homonymous superior quadrantanopia ("pie-in-the-sky" deficit)"
"posterior +/- central bundle; inferior or "pie-in-the-floor" deficit"
"anterior choroidal artery supplies both medial and lateral parts of the lateral geniculate nucleus; an occlusion lesion results in a homonymous sectoranopia"
"lateral choroidal artery supplies the hilum of the lateral geniculate nucleus; an occlusion here may cause a homonymous sectoranopia (i.e. lateral “pie defect”)"
"middle cerebral artery and posterior cerebral artery infarcts may affect the radiations distal to the lateral geniculate nucleus, and can cause a range of clinical presentations from small homonymous quadrantanopias to dense homonymous hemianopias; these changes are often part of a larger stroke syndrome"
"occipital cortex lesions tend to cause homonymous hemianopias of variable size – with or without macular involvement; the MCA may supply the distal tip of the occipital lobe, corresponding to the macula"