Wondering If My Grandson Is Exhibiting Some Signs Of Weakness In His Right Arm. He Is Just Under 1 Yr Old And Has Been Crawling For About A

Muscles Are Not Weak But Cannot Stand More Than 30 Seconds Before Feeling Weak, Fatigued, No Stamina And Needing To Sit. Is This SMA?

Hi, My Son Saw His Neurologist Last Week. They Informed Us That SMA Affects The Bones Despite Previously Been Told It Doesn't.