Henk T. Hendricks

Short-term Effects of Whole-body Vibration on Postural Control in Unilateral Chronic Stroke Patients: Preliminary Evidence

van Nes IJW, Geurts ACH, Hendricks HT, Duysens J: Short-term effects of whole-body vibration on postural control in unilateral chronic stroke patients: Preliminary evidence. Am J Phys Med Rehabil 2004;83:867–873. The short-term effects of whole-body vibration as a novel method of somatosensory stimulation on postural control were investigated in 23 chronic stroke patients. While standing on a commercial platform, patients received 30-Hz oscillations at 3 mm of amplitude in the frontal plane. Balance was assessed four times at 45-min intervals with a dual-plate force platform, while quietly standing with the eyes opened and closed and while performing a voluntary weight-shifting task with visual feedback of center-of-pressure movements. Between the second and third assessments, four repetitions of 45-sec whole-body vibrations were given. The results indicated a stable baseline performance from the first to the second assessment for all tasks. After the whole-body vibration, the third assessment demonstrated a reduction in the root mean square (RMS) center-of-pressure velocity in the anteroposterior direction when standing with the eyes closed (P < 0.01), which persisted during the fourth assessment. Furthermore, patients showed an increase in their weight-shifting speed at the third balance assessment (P < 0.05) while their precision remained constant. No adverse effects of whole-body vibration were observed. It is concluded that whole-body vibration may be a promising candidate to improve proprioceptive control of posture in stroke patients.

Predicting Hand Motor Recovery in Severe Stroke: The Role of Motor Evoked Potentials in Relation to Early Clinical Assessment

Objective. The primary aim of this study was to compare the predictive value of motor evoked potentials (MEPs) and early clinical assessment with regard to long-term hand motor recovery in patients with profound hemiplegia after stroke. Methods. The sample was an inception cohort of 39 stroke patients with an acute, ischemic, supratentorial stroke and an initial upper-extremity paralysis admitted to an academic hospital. Hand motor function recovery was defined at 26 weeks poststroke as a Fugl–Meyer Motor Assessment (FMA) hand score >3 points. The following prognostic factors were compared at week 1 and week 3 poststroke: motor functions as assessed by the FMA upper-extremity and lower-extremity subscores, and the presence of an MEP in the abductor digiti minimi and biceps brachii muscle. Results. Both the presence of an abductor digiti minimi–MEP and any motor recovery in the FMA upper-extremity subscore showed a positive predictive value of 1.00 at weeks 1 and 3. The FMA lower-extremity subscore showed the best negative predictive value (0.90; 95% CI 0.78-1.00 at week 1 and 0.95; 95% CI 0.87-1.00 at week 3). Conclusions. In stroke patients with an initial paralysis of the upper extremity the presence or absence of an MEP has similar predictive value compared with early clinical assessment with regard to long-term hand motor recovery.

Brain injury severity and autonomic dysregulation accurately predict heterotopic ossification in patients with traumatic brain injury

Objective : To assess brain injury severity, autonomic dysregulation and systemic infection as risk factors for the occurrence of heterotopic ossification in patients with severe traumatic brain injury. Design : Historic cohort study. Setting : Radboud University Medical Centre. Subjects : All consecutively admitted patients with severe traumatic brain injury (admission Glasgow Coma Scale score 8 or less) during the years 2002—2003. Main measures : The development of clinically relevant heterotopic ossification, defined as painful swelling of joints with redness and decreased range of motion, confirmed radiographically. Results : Seventy-six (64%) of the 119 patients survived and were eligible for further follow-up. Nine patients (12%) developed 20 symptomatic heterotopic ossifications, in one or more joints. Patients with heterotopic ossification had sustained more severe brain injuries, compared to the group without heterotopic ossification. The mean coma duration in the heterotopic ossification group was 28.11 days (SD 20.20) versus 7.54 days (SD 7.47) in the patients without heterotopic ossification (P < 0.001). The occurrence of autonomic dysregulation (relative risk (RR) 59.55, 95% confidence interval (CI) 8.39—422.36), diffuse axonal injury (RR 20.68, 95% CI 4.92—86.91), spasticity (RR 16.96, 95% CI 3.96—72.57) and systemic infection (RR 13.12, 95% CI 3.01—57.17) were all associated with an increased risk of developing symptomatic heterotopic ossification. However, only autonomic dysregulation had a high positive (88.9%, 95% CI 51.7—99.7) and negative (98.5%, 95% CI 91.9—99.9) predictive value with regard to heterotopic ossification. Conclusions : The occurrence of autonomic dysregulation may predict the chance of developing heterotopic ossification in patients with severe head injury.

Dysautonomia after severe traumatic brain injury

Background:  Dysautonomia after traumatic brain injury (TBI) is characterized by episodes of increased heart rate, respiratory rate, temperature, blood pressure, muscle tone, decorticate or decerebrate posturing, and profuse sweating. This study addresses the incidence of dysautonomia after severe TBI, the clinical variables that are associated with dysautonomia, and the functional outcome of patients with dysautonomia.

Motor Evoked Potentials of the Lower Extremity in Predicting Motor Recovery and Ambulation After Stroke: A Cohort Study

OBJECTIVE To assess the prognostic value of motor evoked potentials (MEPs) in the lower extremity with respect to motor recovery and functional recovery in stroke patients. DESIGN Cohort study. SETTING The department of neurology at a university hospital. PARTICIPANTS Thirty-eight acute-stroke patients with complete paralysis (paralysis subgroup) or severe paresis (paresis subgroup) of the lower extremity. MEPs of the vastus medialis and the tibialis anterior muscles were recorded between days 3 and 10 after stroke onset. INTERVENTIONS Not applicable. Main outcome measures A separate proximal leg motor score (maximum, 16 points) and crural motor score (maximum, 2 points) were defined within the lower-limb subset of the original Fugl-Meyer Motor Assessment to evaluate the motor performance at regular intervals until 6 months after stroke. The transfer item of the Barthel Index and the Functional Ambulation Categories scores were used to assess transfer and walking ability. RESULTS For the paralysis subgroup (n=30), the follow-up was complete in 27 patients (2 patients died, 1 patient underwent above-knee amputation). At 26 weeks, 20 patients experienced proximal motor recovery (mean score +/- standard deviation, 11.70+/-4.48), and 12 of them also showed crural motor recovery (mean score, 1.40+/-.51). Nine patients (33%) could perform an independent transfer safely, and 7 (26%) had learned to walk independently. Analysis revealed significant relationships for tibialis anterior muscle MEPs and motor recovery of crural leg muscles (odds ratio [OR]=18.00; 95% confidence interval [CI], 1.31-894.40), but not for vastus medialis muscle MEPs and proximal motor recovery (OR=6.00; 95% CI,.53-303.00). We found no association between vastus medialis muscle MEPs and recovery of ambulation. However, tibialis anterior muscle MEPs seemed to provide a test with prognostic value for the ability to perform independent transfers (OR=17.50; 95% CI, 1.36-267.00), but not for walking (OR=5.25; 95% CI,.40-77.57). Patients in the paresis subgroup experienced more favorable motor and functional recovery than did those in the paralysis subgroup. CONCLUSIONS Tibialis anterior muscle MEPs registered in subacute phase after stroke may provide important prognostic information, both for motor recovery of the crural muscles and for the ability to perform independent transfers in patients with initial complete paralysis of the lower extremity. Vastus medialis muscle MEPs were not predictive for motor and functional recovery.

Motor evoked potentials in predicting recovery from upper extremity paralysis after acute stroke.

Objective: The use of motor evoked potentials (MEPs) in predicting recovery after stroke still appears to be somehow equivocal. We assessed the prognostic value of MEPs with respect to arm and hand motor recovery in acute stroke patients. Methods: This cohort study included 43 consecutive acute stroke patients with complete paralysis of the upper extremity. MEPs of the abductor digiti minimi muscle (ADM) and the biceps brachii muscle (BB) were obtained within 10 days after stroke onset. The upper limb subset of the Fugl-Meyer Motor Assessment was used to evaluate the motor performance at regular intervals until 6 months after stroke. Results: The follow-up was complete in 40 patients (2 patients died and 1 patient had a recurrent stroke); 14 patients showed motor recovery of the arm and their mean 26-week arm motor score was 17.93 (range 3–30, SD 11.68); hand motor recovery occurred in 11 patients and their mean 26-week hand motor score was 11.09 (range 4–14, SD 4.10). Stepwise logistic regression revealed prognostic models for both arm and hand motor recovery based on BB MEPs (odds ratio 7.69, confidence interval, CI, 1.16–50.95) and ADM MEPs (odds ratio 16.20, CI 2.51–104.40), respectively. Conclusions: The predictive significance of MEPs with respect to motor recovery of the upper extremity was obvious in our homogeneous sample of patients. This agrees with the paradigm that motor recovery after infarction is strongly dependent on a critical residual sparing of the corticospinal function. In this context, the test properties of MEPs in predicting motor recovery are discussed. The added value of MEPs with respect to motor recovery of the upper extremity should be regarded as established for patients with initial paralysis, especially since clinical examination alone lacks the possibility to detect the potential for motor recovery in these cases.

Should anterior pituitary function be tested during follow-up of all patients presenting at the emergency department because of traumatic brain injury?

CONTEXT A wide range (15-56%) of prevalences of anterior pituitary insufficiency are reported in patients after traumatic brain injury (TBI). However, different study populations, study designs, and diagnostic procedures were used. No data are available on emergency-department-based cohorts of TBI patients. OBJECTIVE To assess the prevalence of pituitary dysfunction in an emergency-department-based cohort of TBI patients using strict endocrinological diagnostic criteria. METHODS Of all the patients presenting in the emergency department with TBI over a 2-year period, 516 matched the inclusion criteria. One hundred and seven patients (77 with mild TBI and 30 with moderate/severe TBI) agreed to participate. They were screened for anterior pituitary insufficiency by GHRH-arginine testing, evaluation of fasting morning hormone levels (cortisol, TSH, free thyroxine, FSH, LH, and 17beta-estradiol or testosterone), and menstrual history 3-30 months after TBI. Abnormal screening results were defined as low peak GH to GHRH-arginine, or low levels of any of the end-organ hormones with low or normal pituitary hormone levels. Patients with abnormal screening results were extensively evaluated, including additional hormone provocation tests (insulin tolerance test, ACTH stimulation test, and repeated GHRH-arginine test) and assessment of free testosterone levels. RESULTS Screening results were abnormal in 15 of 107 patients. In a subsequent extensive endocrine evaluation, anterior pituitary dysfunction was diagnosed in only one patient (partial hypocortisolism). CONCLUSION By applying strict diagnostic criteria to an emergency-department-based cohort of TBI patients, it was shown that anterior pituitary dysfunction is rare (<1%). Routine pituitary screening in unselected patients after TBI is unlikely to be cost-effective.

Referral of patients with neuromuscular disease to occupational therapy, physical therapy and speech therapy: usual practice versus multidisciplinary advice.

Purpose. To compare the volume of occupational therapy (OT), physical therapy (PT) and speech therapy (ST) as currently received by patients with neuromuscular diseases with the volume of OT, PT and ST recommended by a multidisciplinary team. Method. The use of OT, PT and ST was studied retrospectively and prospectively in a reference group (n = 106) receiving usual care and in an intervention group (n = 102) receiving advice based on multidisciplinary assessments. A cost analysis was made and the implementation of the advice was evaluated at 6 months. Intervention. Multidisciplinary assessments consisted of a single consultation by OT, PT and ST each, followed by a multidisciplinary meeting and integrated advice. Outcome variables. Volume (frequency times duration) of therapy, relative over- and underuse of therapy and costs of therapy and intervention. Results. Compared to the multidisciplinary advice, there was 40% underuse of OT among patients with neuromuscular disease. For PT, there was 32% overuse and 22% underuse; for ST, there was neither over- nor underuse. Some 40% of patients received once-only advice regarding ST compared to 27% regarding OT and 19% regarding PT. The costs of the multidisciplinary advice were estimated at €245 per patient. If fully implemented, our multidisciplinary approach would result in a mean cost savings of €85.20 per patient. The recommended therapy had, however, been implemented only partially at 6 months follow-up. Conclusions. Some patients with a neuromuscular disease do not receive any form of allied healthcare, whereas they should. Among patients with neuromuscular disease who do receive some form of allied healthcare, quite a few receive these treatments for too long periods of time. Ways need to be developed to improve implementation of the multidisciplinary advice and to obtain a more favourable balance between its costs and benefits.

Living with myotonic dystrophy; what can be learned from couples? a qualitative study

BackgroundMyotonic dystrophy type 1 (MD1) is one of the most prevalent neuromuscular diseases, yet very little is known about how MD1 affects the lives of couples and how they themselves manage individually and together. To better match health care to their problems, concerns and needs, it is important to understand their perspective of living with this hereditary, systemic disease.MethodsA qualitative study was carried out with a purposive sample of five middle-aged couples, including three men and two women with MD1 and their partners. Fifteen in-depth interviews with persons with MD1, with their partners and with both of them as a couple took place in the homes of the couples in two cities and three villages in the Netherlands in 2009.ResultsPeople with MD1 associate this progressive, neuromuscular condition with decreasing abilities, describing physical, cognitive and psychosocial barriers to everyday activities and social participation. Partners highlighted the increasing care giving burden, giving directions and using reminders to compensate for the lack of initiative and avoidant behaviour due to MD1. Couples portrayed the dilemmas and frustrations of renegotiating roles and responsibilities; stressing the importance of achieving a balance between individual and shared activities. All participants experienced a lack of understanding from relatives, friends, and society, including health care, leading to withdrawal and isolation. Health care was perceived as fragmentary, with specialists focusing on specific aspects of the disease rather than seeking to understand the implications of the systemic disorder on daily life.ConclusionsLearning from these couples has resulted in recommendations that challenge the tendency to treat MD1 as a condition with primarily physical impairments. It is vital to listen to couples, to elicit the impact of MD1, as a multisystem disorder that influences every aspect of their life together. Couple management, supporting the self-management skills of both partners is proposed as a way of reducing the mismatch between health services and health needs.

Are clinical characteristics associated with upper-extremity hypertonia in severe ischaemic supratentorial stroke?

OBJECTIVE The primary goal of this study was to identify clinical risk factors, in addition to muscle weakness, for upper-extremity hypertonia in patients with severe ischaemic supratentorial stroke. The secondary goal was to investigate the time course of upper-extremity hypertonia in these patients during the first 26 weeks post-stroke. DESIGN Inception cohort. PATIENTS Forty-three consecutive patients with an acute ischaemic supratentorial stroke and an initial upper-extremity paralysis admitted to an academic hospital. MAIN OUTCOME MEASURES PRIMARY OUTCOME hypertonia assessed by the Ashworth scale at week 26 post-stroke. Potential risks factors: motor functions assessed by the upper-extremity subscore of the Fugl-Meyer motor assessment, Barthel Index at week 1, consciousness, sensory disturbances, apraxia, neglect, and hyper-reflexia. Secondary outcome: time course of upper-extremity hypertonia by assessing its prevalence at 6 consecutive moments post-stroke during a follow-up period of 26 weeks. RESULTS Twenty-five patients (63%) developed hypertonia during the follow-up period of 26 weeks. During this period, the prevalence of hypertonia followed a rather dynamic course, with cases of early, transient and late hypertonia. Univariate analyses yielded none of the selected clinical characteristics as significantly associated with hypertonia. CONCLUSION Despite the high incidence of hypertonia (63%) observed, none of the selected clinical characteristics could be identified as a risk factor for hypertonia.