Carolina Gutiérrez

Body Position and Jaw Posture Effects on Supra- and Infrahyoid Electromyographic Activity in Humans

Abstract The purpose of this study was to record the pattern of electromyographic (EMG) activity of supra- and infrahyoid muscles at different body positions and jaw posture tasks. The sample included 22 healthy subjects with natural dentition, bilateral molar support, and absence of posterior occlusal contacts during mandibular protrusion. Bipolar surface electrodes were located on the left supra- and infrahyoid muscles for EMG recordings. In each subject EMG activity was recorded while standing and in the lateral decubitus position, during the following jaw posture tasks: swallowing of saliva, maximal clenching in the intercuspal position, grinding from intercuspal position to protrusive edge-to-edge contact position, and grinding from retruded contact position to intercuspal position. Suprahyoid EMG activity was significantly higher in the intercuspal position than in all the other jaw positions studied (mixed model with unstructured covariance matrix). Suprahyoid EMG activity was similar in both body positions studied. Infrahyoid EMG activity in the intercuspal position was significantly higher than grinding from intercuspal position to protrusive edge-to-edge contact position, similar to swallowing of saliva, and significantly lower than grinding from the retruded contact position to intercuspal position. Infrahyoid EMG activity in the lateral decubitus position was significantly higher than in the standing position. The EMG pattern observed could be of clinical importance in the presence of parafunctional habits, i.e., clenching and/or grinding. The neurophysiological mechanisms involved are discussed.

Winning a Race: Narratives of Healing and Psychotherapy in Children and Adolescents Who Have Been Sexually Abused

ABSTRACT This article explores the process of recovering from sexual abuse according to children and adolescents who have been sexually abused and have successfully completed psychotherapy. In this qualitative study, interviews were conducted with 20 participants from 8 to 18 years of age and then subject to narrative analysis. Results show that participants’ narratives of recovery involve an improvement of psychological well-being. Moreover, they feel better equipped to overcome future challenges, feeling empowered and able to retake control of their lives. Factors that support and inhibit recovery are examined, as are developmental differences. Discussion underlines the valuable role of psychotherapy in helping children and adolescents in their healing process, changing the meaning of the abusive experience, and developing new capacities.

Change during psychotherapy: the perspective of children and adolescents who have been sexually abused

The aim of this research was to identify the meanings of psychotherapeutic change of children and adolescents who have suffered sexual abuse and were in psychotherapy. In order to do this, a qualitative study was carried out in which in-depth interviews complemented with drawings were conducted with 10 children and adolescents, aged between 6 and 16 years, who were taking part in psychotherapy due to sexual abuse. The interviews took place between 6 and 10 months after the start of the therapy and before it ended. Thematic narrative analysis was used for the interviews and visual narrative analysis for the drawings. The main findings showed that children and adolescents visualized psychotherapeutic change as a process in which gradual progress is made. The participants notice changes from an initial state of sadness and distress, mainly describing a positive shift in terms of emotional well-being. In addition, in this phase of the therapy only a few participants identified changes in their feelings regarding the abusive experience. The participants identified aspects of the therapy and supportive relationships with significant others as elements that foster these changes. In their view, hindering elements include changes of therapist, legal factors, and not being believed by their family. It is discussed the importance of knowing the children and adolescents’ perspective regarding psychotherapeutic change while participating in therapy processes, using multiple methodologies, to generate interventions that suit the needs of this population and match the pace of children and adolescents’ change.