Abstract：
:Abnormal oscillatory activity in the basal ganglia is increasingly implicated in the pathophysiology of Parkinson's disease. Such activity is recorded in patients in the form of oscillations in the local field potential (LFP) picked up in the subthalamic nucleus. Previous studies have focused on correlations between features of the time averaged power or amplitude spectrum of the LFP and the clinical state, either off medication or in response to levodopa. However, average spectral densities do not take account of time variant spectral properties and we hypothesised that these dynamic properties of the spectrum of the LFP would contain additional information about clinical state. Here we assess the variability in LFP amplitude over time using the coefficient of variation (CV), evaluating this with regard to clinical state off medication and in response to levodopa in two datasets. The CV of activity in the high beta frequency band was found to be correlated with clinical state off levodopa (rho=-0.59, p<0.001) and this was shown to be complementary, rather than redundant, to spectral amplitude in a multiple regression analysis, selective for rigidity-bradykinesia and highly focal. Similarly, a strong correlation was found between change in clinical scores and change in high beta CV following levodopa (rho=-0.66, p=0.004). This too was selective for rigidity-bradykinesia and non-redundant to spectral power in a multiple regression model. Our results indicate that temporal stability in the beta band is correlated with rigidity-bradykinesia. It is suggested that loss of beta reactivity is deleterious to basal ganglia function over and above any concomitant change in absolute level of beta synchrony. The CV of LFP beta band amplitude may potentially provide an additional index of clinical state suitable for feedback control in closed loop stimulation therapy.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Little S,Pogosyan A,Kuhn AA,Brown Pdoi
10.1016/j.expneurol.2012.04.024subject
Has Abstractpub_date
2012-08-01 00:00:00pages
383-8issue
2eissn
0014-4886issn
1090-2430pii
S0014-4886(12)00196-3journal_volume
236pub_type
杂志文章abstract：:Interest in beta activity in the basal ganglia has mushroomed since it was first identified in the subthalamic nucleus of patients with Parkinson's disease in Jonathan Dostrovsky's landmark paper (Levy et al., 2000). Here we consider a less explored phenomenon; namely gamma frequency synchronisation of neurons in the ...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2012.07.005
更新日期：2013-07-01 00:00:00
abstract：:Neuronal migration was investigated in rodent cerebellum in vitro and in vivo. Time-lapse video recording showed that cultured neurons migrated on laminin by first extending neurites that formed contacts with other neurons. This was followed by movement of the cell nucleus inside the preformed process. No guidance cue...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(92)90119-b
更新日期：1992-08-01 00:00:00
abstract：:Long-term levodopa or dopamine agonist treatment in the MPTP-lesioned primate model of Parkinson's disease elicits dyskinesia, which is phenotypically similar to levodopa-induced dyskinesia in patients with Parkinson's disease. AMPA receptor antagonists have previously been shown to have both anti-parkinsonian and ant...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2001.7854
更新日期：2002-03-01 00:00:00
abstract：:The clinical outcome of peripheral nerve injuries requiring surgical repair is usually poor and efficient therapies do not exist. Recent work has suggested that low-frequency electrical stimulation of the severed nerve which produces repeated discharges of the parent motoneuron perikarya positively influences axonal r...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2007.08.005
更新日期：2007-11-01 00:00:00
abstract：:Some forms of electrographic seizures are generated at the level of the cortical network. Neocortical kindling exhibits a resistance to produce generalized convulsive seizures, and therefore, it was rather difficult to use it to study the cortical epileptogenesis. Here, using supra-threshold cortical kindling, we repo...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2008.02.010
更新日期：2008-06-01 00:00:00
abstract：:Amyotrophic lateral sclerosis (ALS) is an adult-onset, fatal neurodegenerative syndrome characterized by the systemic loss of motor neurons with prominent astrocytosis and microgliosis in the spinal cord and brain. Astrocytes play an essential role in maintaining extracellular microenvironments that surround motor neu...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2018.06.009
更新日期：2018-09-01 00:00:00
abstract：:Adeno-associated virus (AAV) vectors are derived from a nonpathogenic and defective human parvovirus. Although currently unable to display the integration specificity featured by its wild-type parent, the recombinant AAV (rAAV) system has continued to attract enormous interest primarily due to its unique features such...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1006/exnr.1996.6396
更新日期：1997-03-01 00:00:00
abstract：:Russian knapweed is a perennial weed found in many parts of the world, including southern California. Chronic ingestion of this plant by horses has been reported to cause equine nigropallidal encephalomalacia (ENE), which is associated with a movement disorder simulating Parkinson's disease (PD). Repin, a principal in...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1998.6826
更新日期：1998-07-01 00:00:00
abstract：:Cholinergic neurons in the basal forebrain magnocellular complex (BFMC) respond to nerve growth factor (NGF) during development and in adult life, and it has been suggested that the administration of NGF might ameliorate some of the abnormalities that occur in neurological disorders associated with degeneration of thi...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(91)90066-l
更新日期：1991-05-01 00:00:00
abstract：:Huntington's disease (HD) is a progressive neurodegenerative disorder characterized by chorea, psychiatric disturbances, and dementia. It is caused by a polyglutamine repeat expansion in the huntingtin protein. The striatum is a major site of neuronal loss in HD, but the mechanisms underlying the neurodegenerative pro...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2000.7434
更新日期：2000-09-01 00:00:00
abstract：:Implantable silicon microelectrode array technology is a useful technique for obtaining high-density, high-spatial resolution sampling of neuronal activity within the brain and holds promise for a wide range of neuroprosthetic applications. One of the limitations of the current technology is inconsistent performance i...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2005.04.020
更新日期：2005-09-01 00:00:00
abstract：:Theoretical and experimental analyses of deep brain stimulation (DBS) in the subthalamic nucleus (STN) show both excitatory and inhibitory effects on the neural elements surrounding the electrode. Given these observations, the mechanism underlying the therapeutic effect of STN DBS on parkinsonian motor signs remains u...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2008.01.032
更新日期：2008-05-01 00:00:00
abstract：:Febrile seizures are the most common seizure type in children under the age of five, but mechanisms underlying seizure generation in vivo remain unclear. Animal models to address this issue primarily focus on immature rodents heated indirectly using a controlled water bath or air blower. Here we describe an in vivo mo...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2012.06.013
更新日期：2012-09-01 00:00:00
abstract：:Increased intercellular coupling has been implicated in contributing to the synchronization of discharges characteristic of epileptic foci. Using RNA blot analysis, the level of mRNA for the heart-type gap junction protein, connexin43, is shown to be elevated in samples of temporal lobe neocortex obtained at the time ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(91)90007-y
更新日期：1991-02-01 00:00:00
abstract：:Ocular movements of alert cats were recorded by classical electronystagmography techniques during (a) vestibular stimulation (sinusoidal rotation of the cat in complete darkness), (b) optokinetic stimulation (sinusoidal rotation of the visual surroundings around the stationary cat), (c) additive visual-vestibular stim...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90005-5
更新日期：1983-04-01 00:00:00
abstract：:One of the primary hallmarks of glutamate excitotoxicity is degradation of the neuronal cytoskeleton. Using a tissue culture approach, we have investigated the relationship between excitotoxicity and cytoskeletal degradation within axons, with particular reference to the axon specific neurofilament proteins. Neurofila...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2005.01.005
更新日期：2005-06-01 00:00:00
abstract：:beta-N-methylamino-l-alanine (BMAA) is a non-protein amino acid implicated in the neurodegenerative disease amyotrophic lateral sclerosis/Parkinson-dementia complex (ALS/PDC) on Guam. BMAA has recently been discovered in the brains of Alzheimer's patients in Canada and is produced by various species of cyanobacteria a...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2009.04.002
更新日期：2009-06-01 00:00:00
abstract：:The GluN2 subunits that compose N-methyl-d-aspartate receptors (NMDARs) are attractive drug targets for therapeutic intervention in several diseases, in particular Parkinson's disease (PD). The precise roles and possible dysfunctions of NMDARs attributed to specific GluN2 subunits are however unresolved. Through the u...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2014.03.001
更新日期：2014-05-01 00:00:00
abstract：RATIONALE:Neurofibromatosis type 1 (NF1) is associated with higher rates of epilepsy compared to the general population. Some NF1 patients with epilepsy do not have intracranial lesions, suggesting the genetic mutation itself may contribute to higher rates of epilepsy in these patients. We have recently demonstrated in...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2020.113373
更新日期：2020-09-01 00:00:00
abstract：:Many reports indicate that GM1 ganglioside is effective in reducing CNS ischemic injury in animal models. These models employ invasive surgery to induce ischemic damage in otherwise healthy animals. The purpose of this study was to determine if the beneficial effects of GM1 could be generalized to Spontaneously Hypert...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1994.1045
更新日期：1994-03-01 00:00:00
abstract：:Twelve neurons in the median preoptic nucleus were antidromically activated by electrical stimulation of the hypothalamic paraventricular nucleus in the rat. Electrical stimulation of the subfornical organ produced excitation (N = 7) or inhibition (N = 4) of the activity of these identified units. The activity of all ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(86)90184-6
更新日期：1986-09-01 00:00:00
abstract：:Sarcoplasmic reticulum (SR) of high purity and functional integrity was isolated from skeletal muscle of normal and ethanol-tolerant rats. Ethanol at low concentrations (0.1 to 0.2 M), added in vitro to isolated SR, resulted in slight inhibition of both calcium loading and calcium-stimulated ATPase rates. Higher conce...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90308-4
更新日期：1983-06-01 00:00:00
abstract：:Peripheral nerve injury can result in formation of a neuroma, which is often associated with heightened sensitivity to normally innocuous stimuli as well as spontaneous dysesthesia and pain. The onset and persistence of neuropathic pain have been linked to spontaneous ectopic electrogenesis in axons within neuromas, s...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2011.05.005
更新日期：2011-08-01 00:00:00
abstract：:The effects of superior cervical ganglion stimulation and the local application of norepinephrine or its antagonist propranolol were studied in 18 pineal cells. In 61% of the pineal cells, stimulation elicited excitation; the same cells also responded by excitation to norepinephrine ejection. When stimulation and nore...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(85)90149-9
更新日期：1985-12-01 00:00:00
abstract：:Neuronal apoptosis is a central pathological process in subarachnoid hemorrhage (SAH)-induced early brain injury. Previous studies indicated that ErbB4 (EGFR family member v-erb-b2 avian erythroblastic leukemia viral oncogene homolog 4) is essential for normal development and maintenance of the nervous system. In this...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2017.07.014
更新日期：2017-11-01 00:00:00
abstract：:The review outlines data consistent with the hypothesis that inspiratory drive transmission that generates fetal breathing movements (FBMs) is essential for the developmental plasticity of phrenic motoneurons (PMNs) and diaphragm musculature prior to birth. A systematic examination during the perinatal period demonstr...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2016.05.017
更新日期：2017-01-01 00:00:00
abstract：:Stress and glucocorticoids exacerbate pain via undefined mechanisms. Macrophage migration inhibitory factor (MIF) is a constitutively expressed protein that is secreted to maintain immune function when glucocorticoids are elevated by trauma or stress. Here we show that MIF is essential for the development of neuropath...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2012.04.018
更新日期：2012-08-01 00:00:00
abstract：:Hemiparkinson-hemiatrophy syndrome (HP-HA) is associated with skeletal hemiatrophy and the later development of parkinsonism. It is generally assumed that this phenotype is due to the combination of dysfunction of the basal ganglia (e.g., substantia nigra compacta and/or other related structures), causing parkinsonism...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2002.8005
更新日期：2002-10-01 00:00:00
abstract：:Discovery of new central nervous system (CNS) acting therapeutics has been slowed down by the lack of useful applicable biomarkers of disease or drug action often due to inaccessibility of relevant human CNS tissue and cell types. In recent years, non-neuronal cells, such as astrocytes, have been reported to play a hi...
journal_title：Experimental neurology
pub_type： 临床试验,杂志文章
doi：10.1016/j.expneurol.2011.09.002
更新日期：2011-12-01 00:00:00
abstract：:Cinnamophilin (CINN, (8R, 8'S)-4, 4'-dihydroxy-3, 3'-dimethoxy-7-oxo-8, 8'-neolignan) protects against ischemic stroke in mice. While some anti-oxidative effects of CINN have been characterized, its therapeutic window and molecular basis for neuroprotection remain unclear. We evaluated antioxidant and anti-inflammator...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2009.01.019
更新日期：2009-05-01 00:00:00
