Acute Effects of MPH on the Parent-Teen Interactions of Adolescents With ADHD.

This study explored the nature of interactions between adolescent males with ADHD and their mothers, and the effects of methylphenidate (MPH) on an analogue parent-teen interaction task. Twenty-five adolescent males with ADHD ( M = 13.6 years) and their mothers and 14 non-ADHD adolescent males ( M = 13.

Efficacy of a methylphenidate transdermal system versus t.i.d. methylphenidate in a laboratory setting.

Objective: To test the efficacy and tolerability of the methylphenidate transdermal formulation (MTS) against immediate-release methylphenidate (IR MPH) and placebo in a 12-hr analog classroom setting.

Method: A total of nine boys ages 6 to 9 years, medicated with MPH for ADHD, complete a within-subject, double-blind study. For the purpose of the study, the boys are administered a dose of 20 cm(2) MTS, a matched dose of IR MPH 10 mg TID, and placebo.

Can a matrix make a training model?: "no." Let's not throw out the Boulder model.

In response to the call by C.R. Snyder and T.

Excitability changes in human forearm corticospinal projections and spinal reflex pathways during rhythmic voluntary movement of the opposite limb.

Rhythmic movements brought about by the contraction of muscles on one side of the body give rise to phase-locked changes in the excitability of the homologous motor pathways of the opposite limb. Such crossed facilitation should favour patterns of bimanual coordination in which homologous muscles are engaged simultaneously, and disrupt those in which the muscles are activated in an alternating fashion. In order to examine these issues, we obtained responses to transcranial magnetic stimulation (TMS), to stimulation of the cervicomedullary junction (cervicomedullary-evoked potentials, CMEPs), to peripheral nerve stimulation (H-reflexes and f-waves), and elicited stretch reflexes in the relaxed right flexor carpi radialis (FCR) muscle during rhythmic (2 Hz) flexion and extension movements of the opposite (left) wrist.

Role of peripheral afference during acquisition of a complex coordination task.

It has long been supposed that the interference observed in certain patterns of coordination is mediated, at least in part, by peripheral afference from the moving limbs. We manipulated the level of afferent input, arising from movement of the opposite limb, during the acquisition of a complex coordination task. Participants learned to generate flexion and extension movements of the right wrist, of 75 degrees amplitude, that were a quarter cycle out of phase with a 1-Hz sinusoidal visual reference signal.

Neural compensation for compliant loads during rhythmic movement.

An experiment was performed to characterise the movement kinematics and the electromyogram (EMG) during rhythmic voluntary flexion and extension of the wrist against different compliant (elastic-viscous-inertial) loads. Three levels of each type of load, and an unloaded condition, were employed. The movements were paced at a frequency of 1 Hz by an auditory metronome, and visual feedback of wrist displacement in relation to a target amplitude of 100 degree was provided.

Concussions in hockey: there is cause for concern.

Purpose: The purpose of the study was to document various aspects of concussion in Canadian Amateur hockey including demographics, causes, treatment, and prevention in order to guide future recommendations on how to reduce injury.

Methods: A detailed prospective and retrospective concussion history was obtained from British Columbia Junior Hockey League players over the course of two seasons (1998-2000).

Results: Higher rates of concussions occur in games versus practice, and there was an overrepresentation of forwards injured versus defensemen or goaltenders.

Once-a-day Concerta methylphenidate versus three-times-daily methylphenidate in laboratory and natural settings.

Objective: Methylphenidate (MPH), the most commonly prescribed drug for attention-deficit/hyperactivity disorder (ADHD), has a short half-life, which necessitates multiple daily doses. The need for multiple doses produces problems with medication administration during school and after-school hours, and therefore with compliance. Previous long-acting stimulants and preparations have shown effects equivalent to twice-daily dosing of MPH.

A comparison of morning-only and morning/late afternoon Adderall to morning-only, twice-daily, and three times-daily methylphenidate in children with attention-deficit/hyperactivity disorder.

Objective: 1) To compare standard twice-daily methylphenidate (MPH) dosing with a single morning dose of MPH and of Adderall during a typical school-day time period, and 2) to conduct a dose-response study of the effects of a late-afternoon (3:30 PM) dose of MPH and Adderall on evening behavior and side effects.

Design: Within-subject, placebo-controlled, crossover design.

Setting: Intensive summer treatment program with a comprehensive behavioral approach.

The consequences of negative scaffolding for students who learn slowly--a commentary on C. Addison Stone's "The metaphor of scaffolding: its utility for the field of learning disabilities".

In this commentary, we discuss the outcomes of effective scaffolding, the processes by which successful scaffolding works, and consider implications for children with learning disabilities or below-average academic progress. Scaffolding aims at transferring responsibility for task accomplishment from a competent person to a learner. In the context of children with educational problems, we explicate our view that current practices in many schools may result in a kind of reverse-scaffolding, preventing rather than encouraging transfer of responsibility for tasks.

The effectiveness and efficiency of health promotion in specialty clinic care.

Chronic illnesses make up the majority of health problems in North America. Many chronically ill persons adjust over time to their illnesses; however, there remains a small but important group of those less adjusted, who are concentrated in specialty clinics and are high users of health care resources. This randomized clinical trial investigated the impact of health promotion interventions in the form of problem-solving counseling or phone support that augmented conventional clinic medical care.

Problem-solving counselling or phone-call support for outpatients with chronic illness: effective for whom?

The purpose of this randomized controlled trial (RCT) was to determine the effectiveness of problem-solving counselling or phone-call support provided by nurses to outpatients not well adjusted to chronic illness. Subjects (N = 293) completed measures at baseline and after the six-month period of intervention for psychosocial variables including coping behaviours, purpose in life, and psychosocial adjustment to illness. Subjects receiving phone-call support from nurses demonstrated less psychological distress.

Changing conceptions of cognitive behavior modification: retrospect and prospect.

A retrospective analysis of cognitive behavior modification reveals that 3 major metaphors have been offered to explain the role that cognitions play in behavior change. These metaphors include cognition as a form of conditioning, information processing, and, currently, narrative construction. The implications of using each of these metaphors are discussed.

War-related stress. Addressing the stress of war and other traumatic events.

A task force on war-related stress was convened to develop strategies for prevention and treatment of psychological, psychosocial, and psychosomatic disorders associated with the Persian Gulf War and other extreme stressors facing communities in general. The task force focused on the return home, reunion, and reintegration of service personnel with their families and work. Although the Persian Gulf War was won with relative ease, negative psychological sequelae may develop in some individuals because of the stress of war, family disruption, financial difficulty, and changes in family routines.

Cognition and behaviour change.

For the past decade we have been attempting to understand the role of cognition in psychopathology and behaviour modification. The purpose of the present paper is to highlight and discuss what we consider to be some of the most important findings and issues that have emerged. While many other investigators are conducting related research, we have limited our review and discussion to work conducted by Meichenbaum and his colleagues.

The work of worrying in children undergoing surgery.

This study examined the relationship involving children's level of anxiety, defensiveness, and play patterns 1 week prior to, during, and 1 week after hospitalization for minor surgery. A 7-month follow-up was also conducted in order to assess the children's recall for hospital events and coping style. The results suggested that two classes of children could be identified.

Cognitive factors in biofeedback therapy.

The role that the client's cognitions (viz., his self-statements and images) play in each of the various phases of biofeedback training is examined. Biofeedback training is conceptualized as including three phases: initial conceptualization, skills-acquisition and -rehearsal, and transfer of treatment.