Signs & Symptoms by Age
Spastic diplegia usually isn’t obvious at birth — it tends to reveal itself gradually, as a baby misses or delays certain motor milestones. Here’s roughly what that can look like at different ages. Every child is different, and this is a spectrum, not a checklist that has to match exactly.
Infancy (0–12 months)
- Lower muscle tone in the trunk, often alongside tighter-than-typical tone in the legs
- Delayed rolling, sitting, or pushing up
- “Scissoring” — legs crossing or stiffening together when held upright
- Stiffness noticed during diaper changes or when legs are moved passively
Toddler years (1–3)
- Commando-crawling (pulling with arms, legs dragging) instead of typical hands-and-knees crawling, or skipping crawling altogether
- Toe-walking, or a wide, stiff-legged gait once walking begins
- Delayed walking — often noticeably later than typical developmental windows
- Legs that cross or scissor when standing supported
Older children
- Fatigue with walking or standing that seems disproportionate to the activity
- Tightening in calves/hamstrings that seems to increase with growth spurts (this is common — muscles can’t always lengthen as fast as bones grow)
- Possible mild involvement in the arms or hands, though this is usually much less pronounced than in the legs
From our experience — pending: what were the first signs you or your pediatrician noticed with J, and roughly when?
An important caveat
None of this means every child with delayed walking or toe-walking has spastic diplegia — plenty of typically developing children toe-walk or crawl atypically. This page describes patterns that, together with a full clinical evaluation, can point toward a diagnosis — not a self-diagnosis checklist.
Where to go from here