*Assessed at the later of Day 183, Day 302, and Day 394 Study Visit.1 A motor milestone responder was defined according to the Hammersmith Infant Neurological Examination (HINE) Section 2: ≥2 point increase (or maximal score) in ability to kick, or ≥1 point increase in the motor milestones of head control, rolling, sitting, crawling, standing or walking, and improvement in more categories of motor milestones than worsening.1
age 4½ years*Infantile-onset (Type I) SMA
treated with SPINRAZA®
~4 years as of 10/18
1. SPINRAZA® Summary of Product Characteristics.