Biomedical subjects

Joseph H Ricker

Publications and source records attributed to Joseph H Ricker.

11 recordsLinked to original sources

PubMed2005

Treating learning impairments improves memory performance in multiple sclerosis: a randomized clinical trial.

This randomized clinical trial utilized established techniques to improve new learning and memory performance in multiple sclerosis (MS) participants with learning impairment. Participants were 29 individuals with clinically definite MS with documented learning deficits, randomly assigned to the experimental or control group. The experimental group underwent eight sessions of the Story Memory Technique (SMT), while the control group participated in eight sessions of memory exercises. Neuropsychological assessment was conducted at baseline, immediately following treatment and 5 weeks later to assess outcome. When stratifying participants by degree of learning deficits, a significant treatment effect was noted. MS participants with moderate-severe impairment in learning showed a significant improvement in learning abilities when compared to controls, (t(19) =3.32, P<0.01) evident in 88% of participants in the experimental group. Little improvement was noted in MS participants with mild learning impairments. Significant self-reported improvements in memory were noted in MS participants that underwent treatment, but not those that did not undergo treatment (t(26) =2.55, P<0.01). Results indicate that learning and memory deficits in MS can be effectively treated through a memory rehabilitation program utilizing context and imagery to improve new learning. Appropriate patient selection is important, with moderately-severely impaired individuals showing significantly greater benefit from treatment.

Adult↗

PubMed2004

Differential cerebellar activation on functional magnetic resonance imaging during working memory performance in persons with multiple sclerosis.

OBJECTIVE: To explore the potential role of the cerebellum in working memory dysfunction in multiple sclerosis (MS). DESIGN: Blood oxygen level dependent functional magnetic resonance imaging (fMRI) was used to examine cerebellar activation during a working memory task. SETTING: University-affiliated medical rehabilitation facility. PARTICIPANTS: Eight persons with MS and 5 healthy controls. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Change in hemodynamic response. fMRI data were acquired and subsequently analyzed by using Statistical Parametric Mapping. RESULTS: Both the control and MS groups showed significantly greater activations in the right cerebellar hemisphere as compared with the left side. Persons with MS, however, showed no detectable activations in 4 cerebellar substructures that were significantly active in controls (ie, right vermis, right dentate nucleus, right tonsil, cerebellar peduncle). CONCLUSIONS: The significantly decreased cerebellar activation in the MS group suggests that the cerebellum may play a role in the working memory impairment observed in MS.

Adolescent↗

PubMed2004

Board certification in clinical neuropsychology: a response to Rohling et al.

Board certification is intended to protect the public by identifying practitioners that have met minimum standards for education and training in their specialty or discipline. For varied reasons, clinical neuropsychology, like professional psychology as a whole, has struggled to achieve levels of board certification comparable to the medical profession. Rohling, Lees-Haley, Langhinrichsen-Rohling, & Williamson (2003) have recently published a critique of the board certification process in clinical neuropsychology as it is conducted by American Board of Clinical Neuropsychology (ABCN), arguing that one reason for this failure is the overly restrictive nature of the process. In their paper, Rohling et al. provide a signal detection analysis that makes several assumptions about the process and conclude with recommendations for improving the process to better identify "competent" neuropsychologists in practice. While we agree in principle with many of their recommendations, and ABCN had, in fact, implemented several prior to publication of their article, the article contains many faulty assumptions and logical inconsistencies that we believe are harmful to constructive review of the certification process. In this article, we provide a critical review of their analysis and present new and additional data that demonstrate the procedure is not overly restrictive. A primary consideration is the low incidence of seeking board certification among professionals who identify themselves as neuropsychologists (i.e., a low application rate), rather than an overly restrictive process. We describe steps taken to improve the process and conclude that there are numerous areas of agreement with Rohling et al., including the need for ongoing review and continued improvement in the board certification process in all psychological specialties.

Certification↗

PubMed2003

Spinal epidural abscess: study of early outcome.

OBJECTIVE: To evaluate the course, complications, and outcomes of individuals with spinal epidural abscess (SEA) and to compare these factors in individuals who had sustained a traumatic spinal cord injury (TSCI). METHOD: This is a retrospective study evaluating risk factors, functional change, and neuromedical complications. Thirty-two adults with SEA, treated on a rehabilitation unit at an urban university medical center, were compared with 32 individuals with TSCI. Groups were matched by lesion level and American Spinal Injury Association classification. RESULTS: Both groups made significant functional improvement as measured by the functional independence measure (FIM), although the SEA group only averaged a 15-point increase, whereas the TSCI group averaged approximately 30 points. When compared with the TSCI group, the SEA group had a higher frequency of pressure ulcers (P < 0.04), and exhibited greater intravenous drug use (P < 0.008). There were no differences between the groups with respect to discharge placement or neuromedical risk factors. CONCLUSION: A number of predisposing factors and neuromedical complications that have significant medical implications were noted in the SEA group. In general, predisposing factors and outcomes were similar between those with SEA and those with TSCI, except for drug use and rate of pressure ulcers. These factors do not appear to relate to differential outcome in discharge placement, however. Although it is important to be aware of factors that place an individual at risk for SEA and appreciate the risks for complications, significant functional improvement can be achieved in this population.

Activities of Daily Living↗

PubMed2003

Deciphering components of impaired working memory in multiple sclerosis.

OBJECTIVE: To identify working memory (WM) impairment by examining components of auditory working memory with the same sample of individuals with multiple sclerosis (MS). BACKGROUND: Although individuals with MS have consistently demonstrated WM impairments, the specific components involved (i.e., central executive versus storage/maintenance) remain unclear. METHOD: Individuals with MS with and without cognitive impairment and healthy controls were administered a task primarily assessing storage and rehearsal/maintenance (auditory n-back) and a task with a significant central executive component (Paced Auditory Serial Addition Task). RESULTS: Results indicate when the phonological loop is minimally challenged, maintenance of information is generally efficient. However, the addition of a central executive component to processing appears to be the key factor in differentiating individuals with MS with cognitive impairment from those without cognitive impairment and healthy controls. CONCLUSIONS: Results indicated that the primary WM impairment in MS is within the central executive rather than the phonological loop.

Acoustic Stimulation↗

PubMed2003

Clinical and methodological considerations in the application of telerehabilitation after traumatic brain injury: a commentary.

There is increasing interest and activity in the provision of teleassessment and telerehabilitation services to individuals with traumatic brain injury. Yet, little formal research exists, and there are no large-scale clinical trials or evidence-based applications of these technologies in TBI. The present commentary will address several areas that warrant critical consideration before telerehabilitation is likely to be widely implemented and reimbursed.

Brain Injuries↗

PubMed2002

Predictors of driving outcome after traumatic brain injury.

OBJECTIVE: To examine predictors of driving status and fitness to drive after traumatic brain injury (TBI). DESIGN: Retrospective and prospective follow-up of a cohort ranging from 4 months to 10 years post-TBI. SETTING: A Midwestern, urban university-affiliated rehabilitation hospital. PARTICIPANTS: Seventy-one pairs of adults who had sustained a TBI and their significant others. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Driving status (whether the patient resumed driving), driving frequency (estimated miles driven per week), and postinjury driving records compiled by the Department of Motor Vehicles. RESULTS: Logistic and hierarchical regression analyses indicated that the significant other's perceptions of the patient's fitness to drive were the strongest predictor of patients' driving status and driving frequency. However, years postinjury, disability at discharge, and current neuropsychologic functioning best predicted postinjury driving safety as measured by actual incidents. The relation between perception of patients' fitness and actual driving incidents, however, was modest. CONCLUSIONS: Neuropsychologic and medical information available by traditional methods showed unique value in predictive driving safety. However, caregiver perception of patients' fitness was the overwhelming determinant of whether and how much patients drive. The bases on which caregivers form their opinions affect the safety of patients and the public. The rehabilitation setting is a unique resource for family education regarding abilities essential to safe driving.

Adolescent↗

PubMed2002

National survey of clinical neuropsychology postdoctoral fellows.

The present study was designed to survey postdoctoral fellows in clinical neuropsychology about their perceptions of a variety of training standards and recommendations. Survey packets were mailed to the 78 training directors listed in Cripe's (1998) most recent listing of postdoctoral training programs at the time of survey. A response rate of 44% was achieved. Results were notable in that most fellows had been trained in clinical psychology, and mostly in Ph.D. programs. Approximately half had been trained and/or supervised by diplomates in clinical neuropsychology from the American Board of Professional Psychology. Continuing education was judged by respondents to be an insufficient substitute for formal training. Most respondents completed internships and postdoctoral residencies in a hospital setting, with greater than 50% of their time devoted to clinical neuropsychology.

Data Collection↗

PubMed2002

Motor vehicle collision factors influence severity and type of TBI.

PRIMARY OBJECTIVE: To analyse the relationship between motor vehicle collision factors and TBI. RESEARCH DESIGN: Retrospective design analysed the difference between the types of brain injuries sustained in distinct collision configurations. METHODS AND PROCEDURES: Medical charts and police accident reports were reviewed for individuals sustaining TBI in 168 motor vehicle collisions between 1985-1998. MAIN OUTCOMES AND RESULTS: Lateral collisions and collisions involving contact with a fixed object were associated with the most severe brain injuries. Analysis of safety restraints revealed that seatbelts not only reduce the probability of injury, but they also mediate the severity of brain injury when it is sustained. CONCLUSIONS: Future research should focus the prevention of injury by better defining the minimum physical thresholds at which brain injury might be sustained and the mechanisms by which these thresholds are achieved during natural collisions.

Accident Prevention↗

PubMed2002

Telerehabilitation needs: a survey of persons with acquired brain injury.

OBJECTIVE: To survey individuals with acquired brain injury to assess multiple facets of interest, access, and familiarity necessary to implement new telerehabilitation technologies. DESIGN: Anonymous mail survey. SETTING: Community. PARTICIPANTS: Seventy-one respondents to a survey. These individuals had experienced acquired brain injury (predominantly severe traumatic brain injury [TBI]) and were living in the community. Surveys were mailed by a state chapter of the Brain Injury Association to a random selection of members with acquired brain injury. MAIN OUTCOME MEASURE: Survey designed specifically for this investigation. RESULTS: The survey responses indicate that there is great interest in the possibility of accessing telerehabilitative services among individuals with acquired brain injury. In particular, there was strong interest expressed in services that could be used to assist with problems in memory, attention, problem-solving, and activities of daily living. CONCLUSIONS: Telemedicine, and more specifically telerehabilitation, holds great promise as an adjunct to traditional clinical service delivery. Little research in this area has been applied, however, to individuals with acquired brain injuries. Although on the surface, telerehabilitation seems to be an appropriate assessment and treatment modality for individuals with brain injury, it will only succeed if those individuals have the interest-and the access-necessary to use new and evolving technologies.

Adolescent↗

PubMedDate not supplied

The use of atypical antipsychotics in traumatic brain injury.

The use of antipsychotic medication in treating individuals with traumatic brain injury (TBI) has been controversial. Much of the caution derives from animal studies (and limited human data) with regard to typical antipsychotics. Of note, however, is that similar assumptions have been made about the newer generation of atypical antipsychotics as well. Because these agents have different mechanisms of action as well as different neurotransmitter targets, this may very well be unwarranted. In this article, mechanisms of action of typical and atypical antipsychotics are discussed, with particular attention paid to their use in TBI. Indications and contraindications are presented, and recommendations are made for the responsible prescribing of antipsychotic medications after TBI.

Antipsychotic Agents↗