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What is Loss of upward gaze (sun setting sign) is seen in ? and explain in detail?
Perinaud syndrome: D/t compressive lesion of dorsal midbrain(Superior colliculus and Edinger Westphal nucleus)-->impaired motor function of the eye. Triad of perinaud syndrome: Upgaze paralysis Convergence retraction nystagmus Pupillary light-near dissociation. Anton's syndrome: Visual anosognosia associated with confabulation in the setting of obvious visual loss and coical blindness Due to B/L occlusion of distal branches of PCA. Weber's syndrome: Presence of an ipsilateral oculomotor nerve palsy and contralateral hemiparesis or hemiplegia Due to occlusion of P1 PCA Millard Gubler syndrome: Characteristically seen with Pontine stroke. I/L 6th N. palsy- Diplopia on looking laterally I/L 7th N. palsy- facial paralysis but sensations not affected Coicospinal tract damage in pons will lead to C/L hemiplegia in arms and legs