Facts

• Babies and young children develop motor skills (e.g. sitting, walking, running), at different rates and it is normal to see a variation between children in the age at which they develop these skills.

• A loss of previously-attained motor skills (motor regression) or a reduction in motor skills may be caused by a serious illness, including a brain tumour.

• Some babies and young children with balance or movement problems may stop walking and revert to cruising or crawling; doctors describe this as a regression (loss of) motor skills.