Continuous head nodding movement of my mum with 2 years of als limb onset?
So today when me and my dad were talking with my mum, and she was saying no for something, her head movement was a bit unusual. Like how someone would give a single nod from left to right for a No. she did that for 10-15 seconds straight. We noticed it for the first time and found it very unusual since she has never done this before. This happened twice today. When even when the conversation ended, she kept moving her head from left to right for a few seconds. We stopped it by hand both the times. On asking if she was doing that or involuntarily, she didn’t say anything. Is this something that ALS patients go through or something different?