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also called a lumbar puncture. Your doctor may put a hollow needle in your lower back to take a sample of your spinal fluid.Your doctor may remove a small part of your muscle so they can look at it under a microscope. They’ll give you numbing medicine first, so it doesn’t hurt. You may be more likely to get this test if there’s a chance you have another muscle disease besides ALS.I was diagnosed with ALS last year. The symptom that brought me to a doctor was a drop left foot.
When I noticed the drop foot, I went to a sports medicine doctor, who suggested an MRI and X-rays. His initial concern was a herniated disk in my back, which we found by doing an EMG on my left leg. It showed the disk was disrupting my nerves. She needed to do more tests on my upper body and neck and asked me to come back at her next available time, which was nearly a month later.