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Mr Yeoh Ah Peng, 46-year-old, Compression by tumor (Grade II Astrocytoma…

- - - - increased pressure transmitted along the subarachnoid space to optic nerve
        
        axoplasm flow is blocked
        
        stasis in optic nerve head
        
        leads to swelling of optic disc
    - - paracetamol gives anti-inflammatory effect
        
        no analgesic effect since the compression is still there
    - - low pressure shunt is formed at site of lumbar puncture
        
        CSF can escape
        
        drops to spinal cord
        
        leads to herniation
        
        result in coning of brainstem down the foramen magnum
- - - - Simple:change in sensation such as smell and taste
      - Complex:unable to respond to question for up to few minutes
      - second generalized:begins at one part of brain then spread to the both sides
    - - increase muscle tone
    - - Babinski sign
        
        due to dysfunction of corticospinal tract