This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cerebrovascular Diseases, Subject name: Surgery
[{'content': 'Transtentorial uncal heriniation causes all except: \nSelect and explain. \nA. Ipsilateral dilated pupils, B. Ipsilateral hemiplegia, C. Cheyne stokes respiration, D. Decoicate rigidity', 'role': 'user'}, {'content': "Answer: D \nExplanation: Uncal/ Transtentorial Herniation- Uncus & Temporal lobes are forced through Cerebellar Tentorium- Sequential compression of I/L 3rd nerve followed by Brainstem followed by whole BrainstemEarly Signs - I/L Dilated PupilLate Signs- I/L Hemiplegia- Progressive Ptosis- 3rd Nerve Palsy- Cheyne Stoke RespirationVery Late Sign- Quadriparesis- B/L Dilated & fixed Pupil- Erratic Respiration & Death KERNOHAN'S NOTCH PHENOMENON- It is Cerebral Peduncle indentation associated with Trans tentorial or Uncal Herniation- Compression of contralateral cerebral peduncle against the free edge of Tentorium(KERNOHAN'S Notch) |I/L Hemiparesis & I/L 3rd Nerve Palsy KERNOHAN WOLTMAN SIGN- Lateral Displacement of MIDBRAIN|Compress opposite cerebral peduncle|* Babinski sign* Hemiparesis C/L to original Hemiparesis (K- WSIGN)", 'role': 'assistant'}]