The effect of aging on termination of voluntary movement while standing: A study on community-dwelling older adults

For older adults, falls often occur when transitioning from motion to a complete stop, as the motor control required during this phase is very complex and challenging. The purpose of this study was to clarify the effect of aging on the motor control required to terminate motion. Twenty-five healthy older adults (aged >65 years) and 25 healthy young adults (20–23 years) performed a rapid stopping task while standing on a force plate. The rapid stopping task was conducted by analyzing center of pressure (COP) on the force plate during a visually guided tracking experiment. To assess the ability to terminate motion, we measured the velocity waveform for the COP, along with the reaction, propulsion, braking, and total movement times. Both the reaction and movement times of the older-adult group were significantly longer than those of the younger-adult group (all, p < 0.05). There was no significant difference between the groups in regard to the initial backward propulsion time; however, in the subsequent sequence of backward braking, forward propulsion, and backward braking, all times were longer in the older-adult group than in the younger-adult group (p < 0.05). Our results show that the series of time delays shown by older adults when initiating and terminating motion is due to not only delayed reactions but also delayed stopping. Furthermore, our findings suggest that older adults have not only a diminished propulsion ability but also a diminished braking ability.     

Use of Logotherapy's Mountain Range Exercise with Male Adolescents with Mental Retardation/Developmental Disabilities and Sexual Behavior Problems

This article discusses the use of logotherapy's Mountain Range Exercise (MRE) with adolescent males with mild to moderate mental retardation/developmental disabilities and sexual behavior problems in a high-management group home setting. The activity was used in group therapy with nine patients to build rapport, clarify values, enhance attention and focus, and facilitate patient disclosure of sexual offense histories in subsequent sessions. The literature on youths with sexually aggressive behavior problems is reviewed, followed by the rationale for using the technique with this population. Future directions for research are offered.     

Trauma Recovery in the Transgender and Gender Diverse Community: Extensions of the Minority Stress Model for Treatment Planning

Transgender and gender diverse (TGD) populations, including those that do not identify with gender binary constructs (man or woman) are increasingly presenting for treatment of posttrauma sequelae. Providers who offer services for trauma survivors including posttraumatic stress disorder (PTSD) treatment should be knowledgeable about evidence-based care and have some cultural familiarity with TGD experiences. Indeed, the Minority Stress Model suggests that the combination of distal and proximal minority stressors can combine to produce increased mental health symptoms as compared with cisgender peers, though this model has yet to be fully tested. Clients often present with a complicated picture of experiences, which include a variety of minority stressors, microaggressions, discrimination, and traumatic events that can all be related to their identity. However, conceptualizations of trauma treatment in the context of extensive minority stress are lacking. This paper summarizes the existing literature and offers guidance to mental health providers who are well positioned to address stigma, discrimination, violence, and related symptoms that arise from micro-, mezzo- and macro-level spheres of TGD individuals’ experience.     

Towards an ecologically grounded functional practice in rehabilitation

According to the International Classification of Functioning, Disability and Health, effective rehabilitation requires interventions that go beyond minimizing pathological conditions and associated symptoms. The scope of practice must include promoting an individual’s activity within relevant contexts. We argue that best practice requires decisions that are not only evidence-based but also theory-based. Perception and action theories are essential for interpreting evidence and clinical phenomena as well as for developing new interventions. It is our contention that rehabilitation goals can best be achieved if inspired by the ecological approach to perception and action, an approach that focuses on the dynamics of interacting constraints of performer, task and environment. This contrasts with organism-limited motor control theories that have important influence in clinical practice. Parallels between such theories and the medical model of care highlight their fundamental inconsistency with the current understanding of functioning. We contend that incorporating ecological principles into rehabilitation research and practice can help advance our understanding of the complexity of action and provide better grounding for the development of effective functional practice. Implications and initial suggestions for an ecologically grounded functional practice are outlined.     

The effects of distance between interactants and subject anxiety on conjugate lateral eye movements

Ehrlichman and Weinberger (1978, Psychological Bulletin 85, 1080-1101) have suggested that the distance between participants during face-to-face interviewing may be a significant determinant of directional patterns of conjugate lateral eye movements (CLEMS). As predicted, at the longer, social distance CLEMS were dependent on the verbal or spatial nature of questions; when interactants were at a closer, personal distance CLEMS became more consistent in direction, regardless of problem type. Distance manipulation also differentially altered CLEM patterns for the two sexes.     

Computing with connections in visual recognition of origami objects

This paper summarizes our initial foray in tackling Artificial Intelligence problems using a connectionist approach. The particular task chosen was the visual recognition of objects in the Origami world as defined by. The two major questions answered were how to construct a connectionist network to represent and recognize projected line drawings of Origami objects and what advantages such an approach would have. The structure of the resulting connectionist network can be described as a hierarchy of parameter or feature spaces with each node in each of the feature spaces representing a hypothesis about the possible existence of a specific geometric feature of an Origami object. The dynamic behavior of the network is a form of iterative refinement or relaxation whose major characteristic is to prefer more globally interesting interpretations of the input over locally pleasing ones. Examples from the implementation illustrate the system's ability to deal with forms of noise, occlusion and missing information. Other benefits are an inherently parallel approach to vision, limitation of explicit ordering of the search involved in matching model to instance and the elimination of backtracking due to the sharing of partial results as the search progresses. Extensions and problems are also discussed.