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Journal of Experimental Psychology.... Jun 2022The ability to detect and correct action errors is paramount to safe and efficient behavior. Its underlying processes are subject of intense scientific debate. The...
The ability to detect and correct action errors is paramount to safe and efficient behavior. Its underlying processes are subject of intense scientific debate. The recent adaptive orienting theory of error processing (AOT) proposes that errors trigger a cascade of processes that purportedly begins with a broad suppression of active motoric and-crucially-cognitive processes. While the motoric effects of errors are well established, an empirical test of their purported suppressive effects on active cognitive processes is still missing. Here, we provide data from seven experiments that clearly demonstrate such effects. Participants maintained information in working memory (WM) and performed different response conflict tasks during the delay period. Motor error commission during the delay period consistently reduced accuracy on the WM probe, demonstrating an error-related impairment of WM maintenance. We discuss the broad theoretical and practical implications of this finding, both for the AOT and beyond. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
Topics: Humans; Memory, Short-Term
PubMed: 35143251
DOI: 10.1037/xge0001142 -
Children (Basel, Switzerland) Dec 2020Very preterm children (<32 weeks gestation at birth; VP) are at risk of developmental difficulties. Specific functional difficulties and delays in visual perception,...
Very preterm children (<32 weeks gestation at birth; VP) are at risk of developmental difficulties. Specific functional difficulties and delays in visual perception, fine motor, and visual-motor skills have received little research attention, although they are critical for daily life and school readiness. Our aim was to assess these skills in a contemporary cohort of 60 VP and 60 matched term-born children before school entry. We administered the Movement Assessment Battery for Children (M-ABC-2) and the Developmental Test of Visual Perception (DTVP-2). Linear and logistic regressions were run to test group differences in performance and rates of developmental delay in visual perception, fine motor, and visual-motor skills. Very preterm children had lower scores than term-born children in visual perception ( = -0.25; = 0.006), fine motor ( = -0.44; < 0.001), and visual-motor tasks ( = -0.46; < 0.001). The rate of developmental delay (<-1 SD) was higher among VP in visual perception (odds ratio (OR) = 3.4; 95% confidence interval (CI 1.1-10.6)), fine motor (OR = 6.2 (2.4-16.0)), and visual-motor skills (OR = 13.4 (4.1-43.9)) than in term-born controls. VP children are at increased risk for clinically relevant developmental delays in visual perception, fine motor, and visual-motor skills. Following up VP children until preschool age may facilitate early identification and timely intervention.
PubMed: 33291494
DOI: 10.3390/children7120276 -
Pediatrics May 2021Children with gene expansions are known to experience a range of developmental challenges, including fragile X syndrome. However, little is known about early...
BACKGROUND
Children with gene expansions are known to experience a range of developmental challenges, including fragile X syndrome. However, little is known about early development and symptom onset, information that is critical to guide earlier identification, more accurate prognoses, and improved treatment options.
METHODS
Data from 8 unique studies that used the to assess children with an gene expansion were combined to create a data set of 1178 observations of >500 young children. Linear mixed modeling was used to explore developmental trajectories, symptom onset, and unique developmental profiles of children <5 years of age.
RESULTS
Boys with an gene full mutation showed delays in early learning, motor skills, and language development as young as 6 months of age, and both sexes with a full mutation were delayed on all developmental domains by their second birthday. Boys with a full mutation continued to gain skills over early childhood at around half the rate of their typically developing peers; girls with a full mutation showed growth at around three-quarters of the rate of their typically developing peers. Although children with a premutation were mostly typical in their developmental profiles and trajectories, mild but significant delays in fine motor skills by 18 months were detected.
CONCLUSIONS
Children with the gene full mutation demonstrate significant developmental challenges within the first 2 years of life, suggesting that earlier identification is needed to facilitate earlier implementation of interventions and therapeutics to maximize effectiveness.
Topics: Child, Preschool; Developmental Disabilities; Female; Fragile X Mental Retardation Protein; Humans; Infant; Male; Mutation
PubMed: 33911031
DOI: 10.1542/peds.2020-011528 -
Journal of Neurophysiology Oct 2017Movement adaptation in response to systematic motor perturbations exhibits distinct spatial and temporal properties. These characteristics are typically studied in...
Movement adaptation in response to systematic motor perturbations exhibits distinct spatial and temporal properties. These characteristics are typically studied in isolation, leaving the interaction largely unknown. Here we examined how the temporal decay of visuomotor adaptation influences the spatial generalization of the motor recalibration. First, we quantified the extent to which adaptation decayed over time. Subjects reached to a peripheral target, and a rotation was applied to the visual feedback of the unseen motion. The retention of this adaptation over different delays (0-120 s) ) decreased by 29.0 ± 6.8% at the longest delay and ) was represented by a simple exponential, with a time constant of 22.5 ± 5.6 s. On the basis of this relationship we simulated how the spatial generalization of adaptation would change with delay. To test this directly, we trained additional subjects with the same perturbation and assessed transfer to 19 different locations (spaced 15° apart, symmetric around the trained location) and examined three delays (~4, 12, and 25 s). Consistent with the simulation, we found that generalization around the trained direction (±15°) significantly decreased with delay and distance, while locations >60° displayed near-constant spatiotemporal transfer. Intermediate distances (30° and 45°) showed a difference in transfer across space, but this amount was approximately constant across time. Interestingly, the decay at the trained direction was faster than that based purely on time, suggesting that the spatial transfer of adaptation is modified by concurrent passive (time dependent) and active (movement dependent) processes. Short-term motor adaptation exhibits distinct spatial and temporal characteristics. Here we investigated the interaction of these features, utilizing a simple motor adaptation paradigm (recalibration of reaching arm movements in response to rotated visual feedback). We examined the changes in the spatial generalization of motor adaptation for different temporal manipulations and report that the spatiotemporal generalization of motor adaptation is generally local and is influenced by both passive (time dependent) and active (movement dependent) learning processes.
Topics: Adult; Arm; Brain; Feedback, Physiological; Female; Generalization, Psychological; Humans; Male; Movement; Time; Visual Perception
PubMed: 28768744
DOI: 10.1152/jn.00822.2016 -
Neuropsychiatric Disease and Treatment 2023This study reviews the molecular mechanism of exercise-induced autophagy/mitophagy and its possible mechanism in delaying motor symptoms progressivity in Parkinson's... (Review)
Review
This study reviews the molecular mechanism of exercise-induced autophagy/mitophagy and its possible mechanism in delaying motor symptoms progressivity in Parkinson's disease (PD). Relevant articles obtained from PubMed and EBSCOhost were reviewed. After analyzing the articles, it was found that autophagy can be induced by exercise and can possibly be activated through the AMPK-ULK1 pathway. Mitophagy can also be induced by exercise and can possibly be activated through PINK1/Parkin pathway and AMPK-dependent pathway. Moreover, exercise-induced autophagy can decrease the accumulation of toxic α-synuclein aggregates in PD and therefore can delay motor symptoms progressivity.
PubMed: 37255530
DOI: 10.2147/NDT.S401416 -
The Cochrane Database of Systematic... Oct 2007Drugs that mimic dopamine, such as bromocriptine (BR), were introduced as monotherapy or in combination with levodopa (LD) in the hope that this approach would prevent... (Review)
Review
BACKGROUND
Drugs that mimic dopamine, such as bromocriptine (BR), were introduced as monotherapy or in combination with levodopa (LD) in the hope that this approach would prevent or delay the onset of motor complications in patients with Parkinson's disease (PD). However, hitherto, the role of BR has remained controversial. We present a systematic review of all randomised controlled trials (RCTs) of BR/LD combination therapy compared with LD monotherapy in PD.
OBJECTIVES
To assess the efficacy and safety of BR/LD combination therapy in delaying the onset of motor complications associated with LD monotherapy in patients with PD.
SEARCH STRATEGY
We searched the Movement Disorders Group trials register which includes MEDLINE and EMBASE; the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library); handsearched appropriate neurology journals, symposia reports, PD handbooks and reference lists of reviews found by the search-strategy. We also contacted Sandoz -now Novartis- (manufacturer of BR) and PPD Pharmaco and contacted colleagues who had co-ordinated trials on BR.
SELECTION CRITERIA
RCTs were eligible for inclusion if they evaluated the efficacy of BR/LD combination therapy for delaying the onset of motor complications compared with LD monotherapy in patients with PD. Outcome measures evaluated included the occurrence and severity of motor complications, impairment and disability scores, side effects and dropouts.
DATA COLLECTION AND ANALYSIS
To determine the feasibility of a quantitative systematic review two independent reviewers evaluated the methodological quality of identified trials and extracted data from the trials.
MAIN RESULTS
The methodological quality of seven trials showed important shortcomings. All studies failed adequately to describe randomisation procedures. Only three were carried out according to a double-blind design. Differences were found between studies concerning the mean age of the participants, the BR titration phase, the maximum achieved daily dose of LD (62.5 to 1000 mg) and BR (5 to 50 mg), and the applied outcomes. Our results show no evidence of consistent differences between treatment groups concerning the occurrence and severity of motor complications, scores of impairment and disability, or the occurrence of side effects.
AUTHORS' CONCLUSIONS
This systematic review revealed no evidence to support the use of early BR/LD combination therapy as a strategy to prevent or delay the onset of motor complications in the treatment of PD.
Topics: Antiparkinson Agents; Bromocriptine; Combined Modality Therapy; Humans; Levodopa; Parkinson Disease; Randomized Controlled Trials as Topic
PubMed: 17943795
DOI: 10.1002/14651858.CD003634.pub2 -
Journal of Clinical Neuroscience :... Sep 2023Stroke presenting with a reduced level of consciousness (RLOC) may result in diagnostic error and/or delay. Missed or delayed diagnosis of acute ischaemic stroke may... (Review)
Review
INTRODUCTION
Stroke presenting with a reduced level of consciousness (RLOC) may result in diagnostic error and/or delay. Missed or delayed diagnosis of acute ischaemic stroke may preclude otherwise applicable hyperacute stroke interventions. The frequency, reasons for, and consequences of diagnostic error and delay due to RLOC are uncertain.
METHOD
The databases PubMed, EMBASE, and Cochrane library were searched in adherence with the PRISMA guidelines. The systematic review was prospectively registered on PROSPERO.
RESULTS
Initial searches returned 1162 results, of which 6 fulfilled inclusion criteria. The majority of identified studies show that ischaemic stroke presenting with RLOC is at increased risk of missed or delayed diagnosis. Hyperacute stroke interventions may also be delayed. There is limited evidence regarding the reason for these delays; however, the delays may result from neuroimaging delay associated with diagnostic uncertainty. There is also limited evidence regarding the outcomes of patients with stroke and RLOC who experience diagnostic delay; however, the available literature suggests that outcomes may be poor, including motor and cognitive impairment, as well as long-term impaired consciousness. The included studies did not evaluate, but have suggested urgent MRI access, educational interventions, and protocolisation of the evaluation of RLOC as means to reduce poor outcomes.
CONCLUSIONS
Ischaemic stroke patients with RLOC are at risk of diagnostic delay and error. These patients may have poor outcomes. Additional research is required to identify the contributing factors more clearly and to provide amelioration strategies.
Topics: Humans; Stroke; Brain Ischemia; Consciousness; Delayed Diagnosis; Ischemic Stroke
PubMed: 37454440
DOI: 10.1016/j.jocn.2023.07.009 -
Cureus May 2023Neuro-developmental delay (NDD) is when a child's reflexes and nervous system are underdeveloped or immature at a given stage of child development. Neurodevelopmental... (Review)
Review
Neuro-developmental delay (NDD) is when a child's reflexes and nervous system are underdeveloped or immature at a given stage of child development. Neurodevelopmental delays account for delayed skill development surrounding speech, social, emotional, behavioral, motor, and cognitive delays. NDD might affect the child's psychological and physical well-being, resulting in chronic disease and disabilities throughout adulthood. This review sought to investigate the implication of early diagnosis and intervention of NDD in children. In this regard, this research opted for a systematic meta-analysis that used keywords and Boolean operators to search through main databases, including the Web of Science, JStor, PsychINFO, Science Direct, Cochrane, Scopus, and ASSIA. The result identified that telehealth interventions improved the management of NDD in children. Also, the Early Start Denver Model (ESDM) model was determined to improve the quality of life for NDD children. Another model was LEAP (Learning Experience and Alternative Program for Preschoolers and Their Parents) and Leap (Learning, engaging, and Playing), which improved behavioral, education, and social interventions in NDD children. The study identified that technology could revolutionize NDD interventions in children, possibly improving the quality of life. The parent-children relationship was shown to enhance the management of this condition; thus, it is recommended as one of the best ways to intervene in the management of NDD. Most importantly, the integration of machine learning algorithms and technology can create models; while this may not be significant in the treatment of childhood NDD but instead might be ideal in improving the quality of life for NDD children. Moreover, their social and communication skills along with academic achievements will improve. The study proposes further research in order to understand the different types of NDDs and their intervention strategies to help the researchers identify the most accurate models to improve the conditions and support the parents and guardians in the management.
PubMed: 37303321
DOI: 10.7759/cureus.38745 -
Diagnostics (Basel, Switzerland) Nov 2023Preterm infants are more likely to demonstrate developmental delays than fullterm infants. Postural measurement tools may be effective in measuring the center of... (Review)
Review
Preterm infants are more likely to demonstrate developmental delays than fullterm infants. Postural measurement tools may be effective in measuring the center of pressure (COP) and asymmetry, as well as predicting future motor impairment. The objective of this systematic review was to evaluate existing evidence regarding use of pressure mats or force plates for measuring COP and asymmetry in preterm infants, to determine how measures differ between preterm and fullterm infants and if these tools appropriately predict future motor impairment. The consulted databases included PubMed, Embase, Scopus, and CINAHL. The quality of the literature and the risk of bias were assessed utilizing the ROB2: revised Cochrane risk-of bias tool. Nine manuscripts met the criteria for review. The postural control tools included were FSA UltraThin seat mat, Conformat Pressure-Sensitive mat, Play and Neuro-Developmental Assessment, and standard force plates. Studies demonstrated that all tools were capable of COP assessment in preterm infants and support the association between the observation of reduced postural complexity prior to the observation of midline head control as an indicator of future motor delay. Postural measurement tools provide quick and objective measures of postural control and asymmetry. Based on the degree of impairment, these tools may provide an alternative to standardized assessments that may be taxing to the preterm infant, inaccessible to therapists, or not sensitive enough to capture motor delays.
PubMed: 37998609
DOI: 10.3390/diagnostics13223473 -
Tremor and Other Hyperkinetic Movements... 2021The mechanisms contributing to the pathogenesis of tremor and/or dysmetria in multiple sclerosis (MS) are poorly understood. Abnormal oscillations within the...
OBJECTIVE
The mechanisms contributing to the pathogenesis of tremor and/or dysmetria in multiple sclerosis (MS) are poorly understood. Abnormal oscillations within the olivo-cerebello-thalamo-cortical networks are believed to play an important part in tremor aetiology, but could also contribute to intention dysmetria due to disruptions in motor timing. Conversely, delayed central motor conduction times are a common feature of ataxias, but could also contribute to the expression of dysmetria in MS. This study examined the roles of central conduction delays in the manifestation of tremor and/or dysmetria in MS.
METHODS
Twenty-three individuals with MS participated: 8 with no movement disorder, 6 with tremor, 4 with pure dysmetria and 5 with both tremor and dysmetria. Median nerve somatosensory evoked potentials (SEPs), transcranial magnetic stimulation (TMS) over the motor cortex and cervical spine, stretch reflexes were used assess sensory and motor conduction times.
RESULTS
Central, but not peripheral, sensory conductions time were significantly delayed in participants with dysmetria, regardless of the presence of tremor. Similarly, the TMS evoked muscles responses and the long-latency component of stretch reflexes were significantly delayed in those with dysmetria, but not pure tremor.
CONCLUSION
Dysmetria in MS is associated with delays in central conduction of sensory or motor pathways, or both, likely leading to disruption of muscle activation timing and terminal oscillations that contribute to dysmetria.
SIGNIFICANCE
The presence of dysmetria in MS is associated with decreased conduction velocities in central sensory and/or motor pathways likely reflects greater demyelination of these axons compared to those with no movement disorder or pure tremor.
Topics: Cerebellar Ataxia; Evoked Potentials, Somatosensory; Humans; Multiple Sclerosis; Transcranial Magnetic Stimulation; Tremor
PubMed: 34395055
DOI: 10.5334/tohm.598