Abstract:
BACKGROUND:The neural constraints underlying hemiparetic gait dysfunction are associated with abnormal kinetic outflow and altered muscle synergy structure. Recent evidence from our lab implicates the lesioned hemisphere in mediating the expression of abnormally coupled hip adduction and knee extension synergy, suggesting a role of cortical networks in the regulation of lower limb motor outflow poststroke. The potential contribution of contralesional hemisphere (CON-H) in regulating paretic leg kinetics is unknown. The purpose of this study is to characterize the effect of CON-H activation on aberrant across-joint kinetic coupling of the ipsilateral lower-extremity muscles poststroke. METHODS:Amplitude-matched adductor longus motor-evoked potentials were elicited using single pulse transcranial magnetic stimulation (TMS) of the lesioned (L-H) and CON-Hs during an isometric adductor torque matching task from 11 stroke participants. For 10 control participants, TMS of the contralateral and ipsilateral hemisphere were given during the same task. TMS-induced torques were characterized at the hip and knee joints to determine the differential regulation of abnormal kinetic synergies by each motor cortices. The TMS-induced ratio of knee extension/hip adduction torques was quantified during 40 and 20% of maximum adduction torque. FINDINGS:For both the 40 and 20% target adduction tasks, we find that contralesional stimulation significantly reduced but did not eliminate the TMS-induced ratio of knee extension/hip adduction torques for the stroke group (p = 0.0468, p = 0.0396). In contrast, the controls did not present a significantly different TMS-evoked torque following stimulation (p = 0.923) of the hemisphere ipsilateral to the test leg. INTERPRETATION:The reduced expression of abnormal across-joint kinetic coupling suggests that the CON-H may contribute an adaptive role in lower limb control poststroke. Future study of neuromodulation paradigms that leverage adaptive CON-H activation may yield clinically relevant gains in lower limb motor function poststroke.
journal_name
Front Neuroljournal_title
Frontiers in neurologyauthors
Tan AQ,Dhaher YYdoi
10.3389/fneur.2017.00373subject
Has Abstractpub_date
2017-08-07 00:00:00pages
373issn
1664-2295journal_volume
8pub_type
杂志文章abstract::We sought to investigate (1) the characteristics of epileptiform discharge (ED) duration and interdischarge interval (IDI) and (2) the influence of vigilance state on the ED duration and IDI in genetic generalized epilepsy (GGE). In a cohort of patients diagnosed with GGE, 24-h ambulatory EEG recordings were performed...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2018.00036
更新日期:2018-02-19 00:00:00
abstract::[This corrects the article DOI: 10.3389/fneur.2019.00129.]. ...
journal_title:Frontiers in neurology
pub_type: 杂志文章,已发布勘误
doi:10.3389/fneur.2019.00371
更新日期:2019-03-27 00:00:00
abstract::Intracranial atherosclerotic disease was very common among stroke patients of Asians, Blacks, and Hispanics ancestry. Furthermore, stroke patients with intracranial atherosclerosis (ICAS) have higher recurrence rate of cerebral ischemia and death than those without ICAS. However, the natural history of intracranial at...
journal_title:Frontiers in neurology
pub_type: 杂志文章,评审
doi:10.3389/fneur.2014.00125
更新日期:2014-07-10 00:00:00
abstract::Paraneoplastic autoimmune neurological disorders reflect tumor-initiated immune responses against onconeural antigens. Symptoms and signs can affect the central and/or peripheral nervous systems, neuromuscular junction or muscle, and typically evolve subacutely before an underlying neoplasm is discovered. We describe ...
journal_title:Frontiers in neurology
pub_type:
doi:10.3389/fneur.2020.598894
更新日期:2020-12-10 00:00:00
abstract::Methamphetamine (METH) use, referred to as methamphetamine use disorder (MUD), results in neurocognitive decline, a characteristic shared with HIV-associated neurocognitive disorders (HAND). MUD exacerbates HAND partly through glutamate dysregulation. Astrocyte excitatory amino acid transporter (EAAT)-2 is responsible...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.593146
更新日期:2020-11-25 00:00:00
abstract::Object: Predicting whether intramedullary slitlike cavity (SC) will worsen over time or remain stable is an outstanding clinical challenge. The aim of this study was to identify early features of SC (clinical and magnetic resonance imaging [MRI] findings). Methods: We prospectively included all patients referred to ou...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00495
更新日期:2020-06-12 00:00:00
abstract::The purpose of the study was to test the utility of unique panel of blood biomarkers as a means to reflect one's recovery process after sport-related neurotrauma. We established a panel of biomarkers that reacted positive with CD81 (extracellular vesicle marker) and various neuron- and glia-specific antigens [e.g., ne...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2018.00239
更新日期:2018-04-12 00:00:00
abstract::Objective: We conducted this study to analyze the clinical characteristics of the psychiatric symptoms of patients with anti-NMDAR encephalitis. Methods: A retrospective study of anti-NMDAR encephalitis in China was performed. The clinical characteristics of the psychiatric symptoms, the relationship between the antib...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.01330
更新日期:2020-01-24 00:00:00
abstract::Cerebral stroke is a leading cause of death and persistent disability of elderly in the world. Although stroke prevention by targeting several risk factors such as diabetes and hypertension has decreased the stroke incidence, the total number of strokes is increasing due to the population aging and new preventive ther...
journal_title:Frontiers in neurology
pub_type: 杂志文章,评审
doi:10.3389/fneur.2019.00493
更新日期:2019-05-08 00:00:00
abstract::Background and Purpose: Although vertebrobasilar ectasia (VBE) is diagnosed with increasing frequency, it is not clear whether this is because of altered hemodynamics caused by the effects of matrix metalloproteinases (MMPs) and/or vertebral artery dominance (VAD). Therefore, we investigate the relationship between pl...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00931
更新日期:2020-08-25 00:00:00
abstract::Hereditary spastic paraplegias (HSPs) are a heterogeneous group of genetic disorders with spastic paraparesis as the main clinical feature. Complex forms may co-occur with other motor, sensory, and cognitive impairment. A growing number of loci and genes are being identified, but still more than 50% of the patients re...
journal_title:Frontiers in neurology
pub_type:
doi:10.3389/fneur.2020.00041
更新日期:2020-02-14 00:00:00
abstract::Pathological high-frequency oscillations are a novel marker used to improve the delineation of epileptogenic tissue and, hence, the outcome of epilepsy surgery. Their practical clinical utilization is curtailed by the inability to discriminate them from physiological oscillations due to frequency overlap. Although it ...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2017.00687
更新日期:2017-12-21 00:00:00
abstract::Objective: To investigate the hemodynamic features before and after embolization of paraclinoidal aneurysms using hemodynamic numerical simulation and the influence of embolization on recurrence after embolization. Methods: From January 2016 to December 2017, we enrolled a total of 113 paraclinoidal aneurysms treated ...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.00429
更新日期:2019-04-25 00:00:00
abstract::Background: Over the last few years there has been growing interest in use of visual measures as useful tools for multiple sclerosis (MS) prognosis and tracking. Optic neuritis (ON) being a prevalent and often-presenting symptom of the disease, as well as the high occurrence rate of posterior visual system damage inde...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.00455
更新日期:2019-05-03 00:00:00
abstract::[This corrects the article DOI: 10.3389/fneur.2020.578924.]. ...
journal_title:Frontiers in neurology
pub_type: 已发布勘误
doi:10.3389/fneur.2020.638735
更新日期:2021-01-12 00:00:00
abstract::Objectives: This article aims to evaluate the safety and effectiveness of endoscope-assisted surgery for chronic subdural hematoma (cSDH) in comparison with the burr-hole craniostomy. Methods: An electronic literature research was performed in MEDLINE, the Cochrane library, and EMBASE from the inception to February 18...
journal_title:Frontiers in neurology
pub_type:
doi:10.3389/fneur.2020.540911
更新日期:2020-11-05 00:00:00
abstract::Introduction: Although patients with Parkinson's disease (PD) often suffer from oropharyngeal dysphagia, knowledge about the underlying pathophysiological mechanisms is limited. Substance P (SP) is a localization-independent neurotransmitter of the entire nervous system. Reduced levels of SP were found in saliva of pa...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.00386
更新日期:2019-04-16 00:00:00
abstract::Inflammation after traumatic spinal cord injury (SCI) is non-resolving and thus still present in chronic injury stages. It plays a key role in the pathophysiology of SCI and has been associated with further neurodegeneration and development of neuropathic pain. Neural precursor cells (NPCs) have been shown to reduce t...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2018.00428
更新日期:2018-06-08 00:00:00
abstract::Anticoagulation is highly effective in preventing stroke due to atrial fibrillation, but numerous studies have demonstrated low utilization of anticoagulation for these patients. Assessment of clinicians' attitudes on this topic indicate that fear of intracerebral hemorrhage (ICH), rather than appreciation of anticoag...
journal_title:Frontiers in neurology
pub_type: 杂志文章,评审
doi:10.3389/fneur.2013.00137
更新日期:2013-10-04 00:00:00
abstract::Major advances in neonatal care have led to significant improvements in survival rates for preterm infants, but this occurs at a cost, with a strong causal link between preterm birth and neurological deficits, including cerebral palsy (CP). Indeed, in high-income countries, up to 50% of children with CP were born pret...
journal_title:Frontiers in neurology
pub_type: 杂志文章,评审
doi:10.3389/fneur.2014.00200
更新日期:2014-10-09 00:00:00
abstract::Here, we describe a 79-year-old man, admitted to our unit for worsening diplopia and fatigue, started a few weeks after an episode of bronchitis and flu vaccination. Past medical history includes myasthenia gravis (MG), well-controlled by Pyridostigmine, Azathioprine, and Prednisone. During the first days, the patient...
journal_title:Frontiers in neurology
pub_type:
doi:10.3389/fneur.2019.00823
更新日期:2019-08-13 00:00:00
abstract::Lifestyle factors such as intellectual stimulation, cognitive and social engagement, nutrition, and various types of exercise appear to reduce the risk for common age-associated disorders such as Alzheimer's disease (AD) and vascular dementia. In fact, many studies have suggested that promoting physical activity can h...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2011.00028
更新日期:2011-05-06 00:00:00
abstract::Introduction: Persons with MS (PwMS) have markedly reduced push-off and toe-clearance during gait compared to healthy subjects (HS). These deficits may result from alterations in neuromotor control at the ankle. To optimize rehabilitation interventions for PwMS, a crucial step is to evaluate if and how altered neuromo...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00668
更新日期:2020-07-24 00:00:00
abstract::Background/Aims: High intracranial pressure (ICP) is associated with changes in peripapillary Bruch's membrane (pBM) shape on optical coherence tomography (OCT) images of the optic nerve head. It is not known if image acquisition pattern and analysis method impact this association. Materials and Methods: Cross section...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2018.01137
更新日期:2018-12-21 00:00:00
abstract::Background: Caregiver strain is recognized globally with Parkinson's disease (PD). Comparatively little is understood about caregiver burden and strain in Asia. Objective: To investigate caregiver strain for families living with PD in Singapore, in light of international data. Methods: Ninety-four caregivers were recr...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00455
更新日期:2020-06-23 00:00:00
abstract::A decrease in glutamate in the medial prefrontal cortex (mPFC) has been extensively found in animal models of chronic pain. Given that the mPFC is implicated in emotional appraisal, cognition and extinction of fear, could a potential decrease in glutamate be associated with increased pessimistic thinking, fear and wor...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.01110
更新日期:2019-12-03 00:00:00
abstract::Introduction: The main objective of this study was to investigate whether electromyography (EMG) has additional value in the confirmation of the clinical diagnosis of ulnar nerve entrapment at the elbow (UNE) if nerve conduction studies (NCS) are normal. Methods: A prospective cross-sectional cohort observational stud...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.00196
更新日期:2019-03-11 00:00:00
abstract::Traumatic brain injury (TBI) and the activation of secondary injury mechanisms have been linked to impaired cognitive function, which, as observed in TBI patients and animal models, can persist for months and years following the initial injury. Impairments in neurotransmission have been well documented in experimental...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2017.00532
更新日期:2017-10-10 00:00:00
abstract::Carpal tunnel syndrome (CTS) is a disorder of the wrist due to narrowing of the carpal tunnel. It can be caused by trauma or tumors in the tunnel resulting in compression of the median nerve. This disorder is often diagnosed with early symptoms such as tingling, numbness, and weakness that subsequently lead to hand mu...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2019.00888
更新日期:2019-08-26 00:00:00
abstract::Background: In functional movement disorders, explicit movements are impaired, while implicit movements are preserved. Furthermore, there is evidence that the sense of agency is abnormal. Aim: We aimed to investigate how motor responses and sense of agency were affected by subliminal or supraliminal cues in people wit...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00989
更新日期:2020-09-11 00:00:00