Cerebral Palsy

Mixed Reality (MR) refers to the blending of virtual content into the real world. Using MR, we create contextually meaningful scenarios in which users carry out tasks encountered in the presence of visual and aural distracters. Visual distracters can include subtle ones – people walking; and more abrupt ones – cartons falling. Aural distracters can include gentle ones – fans whirring; and more aggressive ones – automobiles backfiring. The intensity of these distracters can be dynamically controlled by a therapist or software that takes into account the patient’s perceived level of stress. Intensity can also be controlled between experiences. For example, one may increase the stress level in a subsequent session, attempting to improve a person’s tolerance. Assessment of progress includes psychophysical metrics (stress indicators) and the performance of tasks (accuracy and adherence to time constraints). By accurately capturing a patient’s interaction with the environment in the context of simulation events, we can use MR as a tool for assessment and rehabilitation planning for individuals with stress-related injuries. This paper reports on the MR environment we have developed and its efficacy (realized and potential) for the assessment of post-traumatic stress disorder (PTSD) with or without traumatic brain injury (TBI).

This study was undertaken to determine the effect of distal hamstring lengthening (DHL) on hip and knee sagittal kinematics, and to investigate the validity of modeled hamstring length for clinical use. Patient group consisted of 28 patients (56 limbs, mean age 7.4 years) with spastic diplegia who underwent bilateral DHL and tendo-Achilles lengthening with/without rectus femoris transfer (RFT) (DHL+RFT subgroup, 40 limbs; DHL subgroup, 16 limbs). Kinematic data was obtained by gait analysis, and hamstring lengths were obtained using a musculoskeletal modeling technique. Postoperatively, knee extension improved (p<0.001) without aggravating anterior pelvic tilt (p=0.565). However, DHL aggravated anterior pelvic tilt in the DHL subgroup (2.2 degrees , p=0.011). In terms of concurrent validity, hamstring length was found to be correlated with mean pelvic tilt (r=0.798, p<0.001) and popliteal angle (r=-0.425, p=0.001), but the correlation between hamstring length and knee flexion at initial contact was minimal (r=0.068, p=0.753). In terms of construct validity, DHL did not lengthen mean hamstring length (p=0.918). In conclusion, DHL appeared to significantly improve knee motion in patients with spastic diplegia. Furthermore, DHL did not increase pelvic tilt, when performed with RFT. Modeled hamstring length is believed to have limited validity in patients with cerebral palsy, because it does not reflect knee kinematics or postoperative change when DHL was combined with multilevel surgery.

BACKGROUND: Paediatric neurological disorders constitute a major cause of disability in childhood. Children in the developing countries are disproportionately affected and in addition face the added burden of poverty, inadequate health facilities, stigmatisation and lack of facilities for rehabilitative care. OBJECTIVE: To describe the spectrum of neurological disorders seen among Nigerian children presenting at the paediatric neurology clinic of the University College Hospital, Ibadan, Nigeria. METHODS: All children presenting at the paediatric neurology clinic of the University College Hospital, Ibadan, Nigeria over a period of 20 months were prospectively studied. Diagnoses were made from detailed history, thorough physical examination, with particular emphasis on the central nervous system and appropriate investigations as indicated. RESULTS: There were a total of 644 cases during the study period, 369 males and 275 females, giving a male to female ratio of 1.3:1. There were 1353 consultations at the paediatric neurology clinic and these accounted for 21.0% of the total 6,442 consultations at the paediatric specialist clinics in the hospital. The most frequent paediatric neurological disorders were epilepsy (45.3%), cerebral palsy (36.0%), neuro-muscular disorders (4.5%) and mental retardation (4.5%). CONCLUSION: Paediatric neurological disorders constitute a major reason for paediatric specialist care in Ibadan, Nigeria. Preventable causes play a major role in the aetiology of the major paediatric neurological disorders seen in this part of the world.

The aims of this study were to: (1) investigate the significance of muscle activation variability and coactivation for the ability to perform steady submaximal ankle torque (torque steadiness) in healthy children and those with cerebral palsy (CP), and (2) assess ankle function during isometric contractions in those children. Fourteen children with CP who walked with equinus foot deformity and 14 healthy (control) children performed maximal and steady submaximal ankle dorsi- and plantarflexions. Dorsiflexion torque steadiness was related to agonist and antagonist muscle activation variability as well as the plantarflexor coactivation level in children with CP (r > 0.624, P < 0.03). Moreover, children with CP displayed reduced maximal torque and submaximal torque steadiness of both dorsi- and plantarflexion compared with controls (P < 0.05). Both muscle groups may benefit from strength training, as they exhibit poor submaximal control and weakness in children with CP. Muscle Nerve, 2009.

BACKGROUND: Changes in the swallowing capabilities of adults with cerebral palsy as they age may impact on their health, safety, and well-being. METHOD: Thirty-two adults with cerebral palsy aged between 30 and 69 years participated in in-depth interviews about their experiences of changes in their swallowing and related management of their mealtimes within the last two years. A constant comparative qualitative analysis of the interviews elucidated the changes they experienced. RESULTS: Changes included increased coughing and choking, digestive or gastro-oesophageal symptoms, diet modification, loss of independence with psychosocial consequences. Participants reported unsatisfactory collaboration with service providers over mealtime management decisions and interventions. CONCLUSIONS: Adults with cerebral palsy may experience gradual changes in their swallowing and mealtime capabilities from as early as 30 years of age. Regular collaborative assessment and involvement of all stakeholders in decisions are important to facilitate compliance with recommendations, ongoing safety, and optimal well-being.

AIM: There were two aims to the study: (1) to provide local outcome data that would be useful in counselling prospective parents of triplets; and (2) to address the deficit in accurate contemporary data on neurodevelopmental outcome and neonatal morbidity for those infants weighing less than 1500 g at birth. METHODS: We reviewed the outcome of triplet pregnancies born at National Women’s Hospital / Auckland City Hospital (Auckland, New Zealand) for 1995-2005 inclusive. For this study triplet pregnancy was defined as a pregnancy beyond 20 weeks leading to registration of at least one birth. RESULTS: For the study period, 55 triplet pregnancies were identified. Forty-five percent of the pregnancies were reported as spontaneously conceived and 60% had no major complications other than premature delivery. One pregnancy spontaneously aborted; three fetuses from one pregnancy were stillborn, and four infants died in delivery suite. The median gestational age at birth was 32 (23-37) weeks and birth weight 1620 (530-2780) g. The median (range) Apgar score, for liveborns, was 8 (2-10) and 10 (4-10) for 1 and 5 minutes respectively. There were five neonatal deaths. Fifty-three infants, <1500g at birth, underwent formal developmental assessment. Three had cerebral palsy (2 hemiplegia and 1 spastic diplegia); one had marked motor delay and one hearing impairment requiring aids. The median Bayley II MDI was 95 (71-105) and PDI 94 (65-110). Outcomes were categorised in surviving triplets <1500 g as normal in 66%, mild abnormality in 17%, moderate abnormality in 15% and severely abnormal in only 2%. CONCLUSION: Although triplets represent a significant burden on the regional NICUs the outcome, including those <1500 g at birth, compares favourably with that reported.

This review provides an overview of results found in literature on objective measurements of upper limb movements in children with hemiplegic cerebral palsy (HCP). Seventeen articles were selected following a systematic search. Analysed tasks varied from simple reaching and gross motor functions to complex, fine motor tasks. Spatiotemporal characteristics have been extensively studied and longer movement durations, slower movement speed and reduced trajectory straightness at the affected upper limb, compared to the non-affected side or healthy children, were most frequently reported. Joint kinematics has been far less studied. The limited data confirm the clinical impression of children with HCP using less elbow extension and supination to reach for an object, which is compensated by increased trunk flexion. Increased trunk involvement was also reported during gross motor functions. Although three-dimensional (3D) movement analysis seems promising to provide additional insights in the pathological upper limb movements observed in HCP, future standardisation of the entire protocol is crucial. No consensus exists on the procedures for data collection, processing, analysing and reporting of results, or what upper limb tasks should be assessed. The International Society of Biomechanics recently proposed recommendations on the definition of upper limb joint coordinate systems and rotation sequences. These guidelines were not yet applied in these studies. Although the diverse methodological approaches used in the studies complicate the comparison of published results, some general conclusions could be drawn. A further standardisation of the protocol for 3D upper limb movement analysis will provide the foundation for comparable and repeatable results and eventually facilitate the selection and planning of treatment interventions.

AIM: To study the correlations between neurological signs and developmental performance, and to analyze the value of neurological signs in identification of developmental disabilities. METHODS: A group of 26 preterm infants (gestational age from 23 weeks to 36 weeks) was studied. The neurological assessment described by Amiel-Tison and Gosselin was performed at term age and repeated every 3 months up to the age of 2, when the sum of all adverse findings was categorized. According to the nature and associations of neurological and cranial signs, patients were divided into 5 categories: 1) cerebral palsy; 2) minimal cerebral palsy; 3) Amiel-Tison triad; 4) intermediate; and 5) normal. Developmental assessment using the Bayley Scales of Infant Development, second edition, was performed between the age of 2 and 3, and the Mental and Psychomotor Developmental Index was determined. RESULTS: The developmental performance was highest in the group of children without neurological signs and lowest in the group with cerebral palsy. There was a strong correlation between neurological signs and mental developmental performance (Spearman rho=0.71), while the correlation between neurological signs and psychomotor developmental performance was weaker (Spearman rho=0.54). CONCLUSION: Categorization of neurological assessment and identification of 3 minor neurological signs may be a valuable tool for early detection of children with developmental disabilities.

OBJECTIVE: The aim of this study was to investigate the effect of different ergonomic desk designs and pencil grip patterns on handwriting performance in children with hemiplegic cerebral palsy and healthy children. METHODS: Twenty-six children with left hemiplegic cerebral palsy and 32 typically developing children were included. The Minnesota Handwriting Assessment was used to evaluate handwriting abilities. Pencil grip posture was assessed with a 5-point rating system. Specifically designed adjustable desks and chairs were used. Four different desk types were used in this study: 1) regular desk; 2) regular desk with a 20 degrees inclination; 3) cutout desk; and 4) cutout desk with a 20 degrees inclination. RESULTS: Statistically significant differences were found between both groups in terms of handwriting ability (p < 0.001). There was no significant difference regarding grip scores between children with cerebral palsy and healthy children (p > 0.05). We found that children with cerebral palsy had better performance using cutout desks in relation to rate and spacing parameters of handwriting (p < 0.05). CONCLUSION: The results of our study demonstrated that the pencil grip patterns have no effect on the handwriting parameters in both children with cerebral palsy and healthy children. It is recommended that a cutout table be used to provide more upper extremity support in handwriting activities for students with cerebral palsy.

Disorders of visual search by coordinated eye and head movements are frequently encountered in patients with brain damage. Homonymous visual field disorders, impaired elementary visual capacities (e.g. acuity, contrast sensitivity, convergent fusion, oculomotor disorders), visual neglect, Balint-Holmes syndrome or dementia (e.g. Alzheimer’s disease) are the most frequent causes of such disorders. Efficient visual search is necessary to select salient stimuli and bring them onto the fovea in order to perform an in-depth analysis. Visual search is not only an indispensible capacity for visual activities in vocational and private life but is also important for many motor and cognitive abilities such as reaching, grasping, standing, spatial perception, route navigation as well as mobility. Despite this importance no comprehensive system exists for the standardized assessment and treatment of visual search disorders in the German-speaking area. In this article, we describe the basic properties of such a system (EYEMOVE). After a short survey of the main causes of visual search disorders following brain damage, the diagnostic facilities, normative data as well as a variety of treatment techniques of this novel system are described. Selected results from on-going clinical studies highlight the practicability and effectiveness of this novel system which contributes to a better management of visual search disorders in neurovisual rehabilitation.