Related Experiment Video
Updated: Jul 23, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Shaking infant trauma induced by misuse of a baby chair
C de San Lazaro1, R Harvey, A Ogden
1The Lindisfarne Centre, Department of Child Health, University of Newcastle upon Tyne, UK. mjatemple@1langdale.freeserve.co.uk
Insights
Forceful bouncing of infants in baby rockers can cause severe brain injuries, including subdural and subhyaloid hemorrhages. This abusive handling generates extreme forces, leading to legal consequences for perpetrators.
Area of Science:
- Pediatrics
- Forensic Medicine
- Biomechanics
Background:
- Infant head injuries are a significant concern.
- Distinguishing accidental injury from abuse is critical in medical and legal contexts.
Observation:
- A 2-month-old infant presented with bilateral subdural and subhyaloid hemorrhages.
- The caregiver admitted to forceful bouncing of the infant in a baby rocker.
Findings:
- Experiments demonstrated that violent rocking in a baby rocker generates extreme alternating acceleration/deceleration forces.
- These forces exceeded those typically induced by shaking alone.
Implications:
- This type of handling constitutes abusive head trauma, not accidental mismanagement.
- Video evidence graphically illustrated the abusive nature of the activity.
- The case resulted in a conviction for cruelty, highlighting the legal ramifications of such actions.
Abstract:
A 2 month old infant presented with bilateral subdural haemorrhages and bilateral subhyaloid haemorrhage. The parent admitted to forceful bouncing of the child in a baby rocker. Experiments showed that violent rocking in the chair could produce extreme alternating acceleration/deceleration forces in excess of those induced by shaking alone. Such handling could not be interpreted as accidental mismanagement and the abusive nature of the process was graphically shown in video recordings of the experiment. Prosecution resulted in a conviction for cruelty, and a suspended sentence.

