Thanks for answering me , l was wonderig, neurologist will know by looking emg if there something else besides als, and nerve condaction test will help too. I think in my emg if there something else they will see i will know.l see 5 or 6 neurologist, one is leading neuromuscular Dr in USC als research center dr beydoun, he said no als but l don't know what, maybe bening lower motor neuron disease. In cedar Sinai als center dr check papers and reflexes said l dont see als but l don't know what, In kaiser neuromuscular Dr 2015 said als but in 2018 said l dont know what.l don't know who believe, that's why l don't want go to any doctor.and I think i have pma, because my walking became wors in 7 years, no other body parts but in lumbar region simptom , only legs weakneses ,became wors , in 2014 _15 i walk wihout can , in 2016 with can only outside, 2017,18 with can inside too, and late in 2018 until now with walker inside and outside. What you think ,thanks for reading my post.