Resumo A luxação isolada do pisiforme é uma lesão rara com poucos casos descritos na literatura. Esse tipo de lesão é observado tipicamente em adultos jovens do sexo masculino e pode ser facilmente negligenciada numa primeira avaliação. A luxação proximal isolada é mais comum devido à ação do flexor ulnar do carpo (FUC). Apresentamos o caso de um paciente do sexo masculino, com 19 anos de idade, com luxação distal isolada do pisiforme após traumatismo do punho. O paciente foi submetido a uma redução aberta e fixação interna com fios de Kirschner com excelente resultado funcional. Apesar de não existir um método de tratamento consensual, a redução fechada perfila-se como tratamento de primeira linha na apresentação aguda. Em caso de insucesso ou como método alternativo pode-se optar pela redução aberta ou a excisão do pisiforme.

Abstract Isolated pisiform dislocation is a rare lesion with few cases described in the literature. This type of lesion is typically observed in young males and can be easily overlooked at first assessment. Isolated proximal dislocation is more common due to the action of the flexor carpi ulnaris (FCU) muscle. We present the case of a 19-year-old male patient with isolated distal pisiform dislocation after wrist trauma. He underwent open reduction and internal fixation with Kirschner wires with excellent functional outcomes. Although there is no consensual therapeutic method, closed reduction is a first-line treatment for acute presentations. Pisiform open reduction or excision may be performed alternatively or after a failed closed reduction.

RESUMEN Los testigos del ciberacoso juegan un importante papel en la resolución de dichas situaciones, lo que es útil para proponer estrategias de autorregulación que les permitan implicarse en comportamientos prosociales en estos contextos. Proponemos que las intervenciones que se sirven de juegos serios con agentes sociales basados en perfiles pueden potenciar el comportamiento prosocial de los testigos de ciberacoso. Se llevó a cabo un estudio piloto cuasiexperimental de medidas repetidas pre/post. Se asignó a 194 alumnos de 7º y 8º a tres condiciones, condición experimental (n = 103, Medad = 13.91, SD = 1.02, 53.3% varones), condición alternativa (n = 37, Medad = 14, SD = 0.86, 54.1% mujeres) y condición control (n = 54, Medad = 13.92, SD = 0.85, 50.9% mujeres). En el análisis de covarianza los jugadores tenían un mayor nivel de comportamiento prosocial asertivo en comparación con otros participantes. En un modelado multinivel de datos longitudinales de archivo quienes no tenían experiencia en el juego tendían a interpretar más las situaciones de ciberacoso como no serias, a evitar asumir la responsabilidad de intervenir y a participar en comportamiento agresivo hacia la víctima. Los jugadores tendían a dar más apoyo y eran menos agresivos con las víctimas de su grupo que con las de otro grupo. Se presentan ideas sobre el desarrollo de juegos que potencien el comportamiento prosocial en testigos de ciberacoso.

ABSTRACT Bystanders of cyberbullying play an important role in the resolution of such situations and therefore, it is beneficial to promote self-regulation strategies that enable them to engage in prosocial behavior in these contexts. We propose that serious game-based psychosocial interventions with profile-based social agents can encourage prosocial bystander behavior in cyberbullying. A pilot quasi-experimental study with repeated and pre/post measurements was performed. We randomly assigned 194 7th and 8th graders to three conditions, namely experimental condition (n = 103, Mage = 13.91, SD = 1.02, 53.3% male); alternative condition (n = 37, Mage = 14, SD = 0.86, 54.1% female) and control condition (n = 54, Mage = 13.92, SD = 0.85, 50.9% female). An analysis of covariance showed that players revealed higher levels of prosocial assertive behavior when compared to other participants. Through multilevel modelling of longitudinal log-file data, we found that those who did not experience the game tended to interpret the cyberbullying situations more as non-serious, avoid assuming responsibility for intervening, and engage in aggressive behavior toward the victim. Players tended to support more and were less aggressive with victims from their in-group than those from the out-group. Insights for the development of games to promote prosocial behavior in bystanders of cyberbullying are presented.