Impaired anticipatory vision and visuomotor coordination affects action planning and execution in children with hemiplegic cerebral palsy.
Kids with hemiplegic CP show delayed eye-movement planning that correlates with slower reaching—consider gaze-training drills before fine-motor tasks.
01Research in Context
What this study did
The team watched kids reach for toys while cameras tracked their eyes and hands. They compared children with hemiplegic cerebral palsy to typically developing peers.
Each child sat at a table. A toy popped up on the left or right. The kids had to grab it quickly. Sensors measured when their eyes moved and when their hand lifted off the table.
What they found
Kids with hemiplegic CP started looking at the toy later. Their eyes jumped around more. Their hands lifted and arrived later too.
The delays were linked. Slower eye planning matched slower reaching. The worse the gaze timing, the worse the hand timing.
How this fits with other research
Brown et al. (1988) showed that a light wrist splint can boost grasp success in hemiplegia. McGarty et al. (2018) now tell us why grasp is hard in the first place: the eyes lag behind, so the hand cannot plan.
Biancotto et al. (2011) saw the same wide, slow reach-to-grasp moves in kids with DCD. The pattern crosses diagnoses: if eye planning is off, the hand shows it.
Tavassoli et al. (2012) looked positive: some kids with CP did show anticipatory gaze in a false-belief game. The difference is the task. Belief games reward social prediction. Reach games need split-second visuomotor timing. Same eyes, different demands.
Why it matters
Before you run fine-motor drills, check the child’s eye timing. A simple gaze warm-up—flash a picture left or right and have the child look and point—can prime the whole system. If the eyes speed up, the hand usually follows.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Open each session with five left/right gaze-shift trials; mark when eyes move, then cue reach—track if hand latency shortens across trials.
02At a glance
03Original abstract
BACKGROUND: Action-planning and execution deficits in children with hemiplegic cerebral palsy (HCP) are potentially due to deficits in the integration of sensory information, such as vision, with motor output. AIMS: To determine differences in anticipatory visual patterns in children with HCP compared to typically developing (TD) children, and to assess visuomotor coordination in children with HCP. METHODS AND PROCEDURES: We included 13 children with HCP (Age = 6.8 + 2.9 yrs) and 15 TD children (Age = 5.8 + 1.1 yrs). The experimental task used in this study is a valid action-planning task, which consisted of initially reaching and grasping an object placed at a fixed position, followed by placing the object in a random target position. Visual patterns were recorded using a head-mounted eye-tracker system and arm movements were recorded using motion capture (120 Hz). OUTCOMES AND RESULTS: Children with HCP had delayed anticipatory gaze time and longer latency than TD children during the planning and execution phases. Children with HCP also had a higher frequency of gaze shifts, longer reaction times (RT) and movement times (MT) than TD children. CONCLUSIONS AND IMPLICATIONS: Children with HCP may have deficits in anticipatory vision, which potentially affected planning and executing a goal-directed action. Therapeutic interventions focusing on improving visuomotor coordination may improve the motor performance in children with HCP.
Research in developmental disabilities, 2018 · doi:10.1016/j.ridd.2018.06.009