This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Motor neuron disease, TRUE is : 
Select and explain. 
A. Sensory involvement, B. Ocular motility is spared, C. Involvement of anterior and lateral columns of spinal cord, D. Intellectual improvement
B: Ocular motility is spared
Answer: B: Ocular motility is spared 
Explanation: Answer is B (Ocular motility is spared): Ocular muscles arc usually not involved in motor neuron disease. Motor neuron diseases can be excluded remembering the following parameters NO sensory deficit. Deficit is purely motor. NO bladder bowel involvement NO impairment of cognitive function NO involvement of ocular muscles. Ocular motility is spared until very late.