Help - ALS pure motor dz - aric - Printable Version +- USMLE Forum - Largest USMLE Community (https://www.usmleforum.com) +-- Forum: USMLE Forum (https://www.usmleforum.com/forumdisplay.php?fid=1) +--- Forum: Step 1 (https://www.usmleforum.com/forumdisplay.php?fid=2) +--- Thread: Help - ALS pure motor dz - aric (/showthread.php?tid=561826)

Help - ALS pure motor dz - aric - ArchivalUser - 01-13-2011 How it cause upper motor defect in lower limb & lower motor defect in upper limb at the same time ? Pl anybody explain . Thanks a lot 0 - ArchivalUser - 01-13-2011 it affects both the ventral horn and corticospinal tracts - thus due to ventral horn , you get lmn, due to corticospinal tract lesion- you get umn 0 - ArchivalUser - 01-13-2011 cookie86 thanks .appeciate it 0 - ArchivalUser - 01-13-2011 is anterior horn and ventral horn the same thing? because from DIT, i heard that ALS causes damage to the anterior horn and corticospinal tract thanks