Cognitive and motor aspects of a coincidence-timing task in Cerebral Palsy children
I Olivier1, C Baker1, J Cordier2
1Université Grenoble Alpes, TIMC-IMAG, F-38000 Grenoble, France; CNRS, TIMC-IMAG, F-38000 Grenoble, France.
Insights
Children with Cerebral Palsy (CP) show similar timing accuracy verbally but greater motor timing errors. This suggests CP children can anticipate events but their motor deficits impact precise timing responses.
Area of Science:
- Neuroscience
- Developmental Psychology
- Motor Control
Background:
- Cerebral Palsy (CP) is a neurological disorder characterized by motor deficits.
- Individuals with CP often struggle with tasks requiring precise spatial and temporal accuracy.
- Anticipation-coincidence tasks are challenging for children with CP due to their motor impairments.
Purpose of the Study:
- To investigate the ability of children with Cerebral Palsy (CP) to perform anticipation-coincidence tasks.
- To differentiate the cognitive and motor components of temporal estimation in CP.
- To understand how sensory-motor deficits affect timing accuracy in CP.
Main Methods:
- 11 children with CP (aged 6-14) and 64 healthy controls (children and adults) participated.
- Participants performed a coincidence-timing task responding to auditory stimuli.
- Two conditions were used: verbal response for temporal estimation and motor response (reaching a target).
Main Results:
- CP children showed comparable temporal errors to controls in the verbal estimation condition.
- In the motor condition, CP children exhibited significantly greater and more variable temporal errors.
- All participants, including those with CP, tended to underestimate stimulus occurrence.
Conclusions:
- Children with CP can cognitively anticipate event timing.
- Motor execution deficits in CP lead to increased temporal inaccuracies in motor-based timing tasks.
- CP children demonstrate partial compensation for sensory-motor deficits during timing tasks.
Abstract:
Cerebral Palsy (CP) is a clinical syndrome involving postural and motor deficits. CP children are less accurate than healthy ones when trying to reach a target. Thus, it is difficult for CP children to perform anticipation-coincidence tasks requiring temporal and/or spatial accuracy to reach the target at the good place in the right time. The purpose of the present experiment was to further investigate CP children's ability to perform anticipation-coincidence tasks, by dissociating the cognitive from the motor aspects of the task. 11 CP children aged 6-14 years, 51 healthy children aged 6-13 years, and 13 healthy adults performed, as accurately as possible, a coincidence-timing in response to a specific sound of a musical sequence. Two experimental conditions were manipulated: In the verbal condition, temporal estimation occurred through a simple verbal response whereas in the motor condition, temporal estimation was performed by reaching a target at a self-paced velocity. In the verbal condition, CP children made similar temporal errors than their healthy counterpart. However, even though all participants underestimated stimulus occurrence, CP children also exhibited greater and more variable temporal errors when they provided a motor response for estimating stimulus occurrence. These data suggested that CP children were able to anticipate stimulus occurrence and to partially take into account their sensory-motor deficits to reach the target at this time occurrence.
