People with complex regional pain syndrome (CRPS) and upper limb pain had longer response times to recognize the laterality of hands compared with feet, whereas those with lower limb pain had longer response times for feet compared with hands. In addition, increased response times for specific rotation conditions were correlated with deterioration of socio-emotional characteristics.
Why this matters
The chronic pain disorder CRPS can lead to impaired body schema and deficits in the mental rotation of a body part image in the limb laterality recognition task (LLRT). To date, studies have not fully investigated the performance of people with upper or lower limb pain on mental rotation of images of both hands and feet.