Disrupted sensorimotor synchronization, but intact rhythm discrimination, in children treated for a cerebellar medulloblastoma.
Kids treated for cerebellar tumors can perceive rhythm but move off-beat—give them extra motor practice, not ear training.
01Research in Context
What this study did
Provasi et al. (2014) asked kids who had surgery and radiation for a cerebellar brain tumor to tap along with a steady beat.
They also played short rhythm patterns and asked the kids to tell which ones were the same or different.
The team wanted to know if the tumor or its treatment hurt the children’s sense of rhythm or only their ability to move in time.
What they found
The children could judge rhythm patterns as well as peers.
When they tapped to the beat, their finger speed was slower and their timing was more variable.
After a short practice block, the tapping improved a little but stayed shaky.
How this fits with other research
Droit-Volet et al. (2013) tested the same tumor group one year earlier. Those kids could not copy brief time intervals by pressing a button, showing a motor timing problem, not a hearing problem. The new tapping data match that picture.
Fitzpatrick et al. (2017) and Kwon et al. (2025) saw similar unstable motor timing in children with autism. All three studies use finger or body sensors to show that poor synchrony is common across diagnoses.
Zhao et al. (2026) looked at eye-gaze instead of fingers and still found weak timing to a children’s song in toddlers with autism. Together the papers say: when the brain’s timing circuits are hurt, moving or looking “in sync” suffers even if hearing is fine.
Why it matters
If a client had a cerebellar tumor, do not assume rhythm games are too hard. Start with simple beat copying and give extra response time. The child can hear the beat; the body just needs more practice and support. Track tapping variability as an easy progress measure.
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02At a glance
03Original abstract
The aim of this study was to investigate the temporal abilities of children treated by surgery for a malignant tumor in the cerebellum, both in the perception and the production of rhythm. Children with a diagnosed medulloblastoma and age-matched control children were tested in a rhythm discrimination task and a sensorimotor synchronization task. Their motor and cognitive capabilities were also assessed through a battery of age-adapted neuropsychological tests. The results did not show any significant difference in performance between groups for the discrimination task. On the contrary, children with cerebellar lesions produced longer and more variable inter-tap intervals (ITI) in their spontaneous motor tempo (SMT) than did the control children. However, the length and, to a lesser extent, the variability of their SMT decreased after a synchronization phase, when they had been instructed to tap in synchrony with a beep. During the synchronization task, the children with medulloblastoma succeeded to modify the length of their ITI in response to an auditory rhythm, although with better success when the inter-stimuli intervals (ISI) were shorter than when they were longer than the ITIs of their own SMT. Correlational analyses revealed that children's poorer synchronization performance was related to lower scores in neuropsychological tests assessing motor dexterity and processing speed.
Research in developmental disabilities, 2014 · doi:10.1016/j.ridd.2014.04.024