A 55-year-old hypeensive female presented with left sided weakness along with left sided homonymous hemianopsia. The symptoms have developed slowly over the past few years. MRI BRAIN The lesion affects a structure which causes weakness. Which nuclei are most closely related to this structure: - Red nucleus Dentate nucleus Substantia nigra Superior olivary nucleus

This is a case of optic tract lesion causing homonymous hemianopia. MRI image shows optic tract lesion on right side going and involving the crus cerebri which is leading to the left sided weakness. The crus cerebri is closely related to the red nucleus and the substantia nigra at the level of mid brain. Dentate nucleus is present in the cerebellum. Superior olivary nucleus is present at the level of medulla. SECTION OF MID BRAIN AT THE LEVEL OF THE INFERIOR COLLICULUS NOTICE THE CLOSE RELATION OF THE OPTIC TRACT WITH THE CRUS CEREBRI