[…] of limbs (60-80%), bulbar symptoms (20%), respiratory muscle weakness (1-3%), generalized weakness in limbs and bulbar muscles (1-9%), axial onset with muscle weakness, muscle
[nnjournal.net]
ALS damages the corticospinal tract and causes spastic limb weakness. The anterior horn is the front part of the spinal cord.
[healthline.com]
There was distal motor weakness in the lower limbs graded 3.
[jamanetwork.com]