Abstract:
:The objective of the present work was to examine fronto-central spindle frequency. A previously validated spindle detector, providing an electroencephalographic (EEG) amplitude independent spindle detection, was used to detect bilateral sleep spindles from sleep EEG recordings of ten healthy subjects with a time resolution of 0.33-s. A bilateral spindle detected centrally and frontopolarly simultaneously is called here a diffuse spindle. A bilateral spindle detected only frontopolarly or centrally at a given time is called a pure frontopolar and a pure central spindle, respectively. Spindle frequency was obtained with zero-padded discrete Fourier transform (DFT). Waveform phase angle of diffuse spindles was also examined. A total of 1230 diffuse spindles and 5316 pure central and 2595 pure frontopolar spindles were detected. The difference of median spindle frequency between central and frontopolar brain positions was clearly smaller in diffuse spindles than in pure spindles. Moreover, 34% of the diffuse spindles showed a similar frequency in central and frontopolar locations. This figure was up to 50.9% when including the 700 diffuse spindles fulfilling a strict anteroposterior (AP) timing criteria. The timing criteria selection in diffuse spindle analysis is a new functionality, enabled by the present spindle analysis method. Diffuse spindles showed coherent spindle oscillation in a large fronto-central area. Pure frontopolar spindles might be special cases of diffuse spindles, both of them seem to be generated in the nucleus medialis dorsalis (NMD) of the thalamus.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Huupponen E,Kulkas A,Tenhunen M,Saastamoinen A,Hasan J,Himanen SLdoi
10.1016/j.jneumeth.2008.03.019subject
Has Abstractpub_date
2008-07-15 00:00:00pages
54-9issue
1eissn
0165-0270issn
1872-678Xpii
S0165-0270(08)00205-7journal_volume
172pub_type
杂志文章abstract:BACKGROUND:Connectivity analysis in magnetoencephalography (MEG) sensor space is commonly used for the preliminary estimation of the functional relationship between cortical areas, but the results are difficult to interpret due to the field spread effect. To improve the interpretability of sensor-level connectivity ana...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2015.09.012
更新日期:2016-01-15 00:00:00
abstract::Amperometry is a very powerful technique for investigating the role(s) specific proteins play in exocytosis at the single-cell level. In this study, amperometry has been used to investigate possible changes in exocytosis at chromaffin cells isolated from coloboma and tottering mutant mice. Coloboma mice possess a dele...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/s0165-0270(00)00359-9
更新日期:2001-01-30 00:00:00
abstract:BACKGROUND:The input signals of electroencephalography (EEG) based brain computer interfaces (BCI) are extensively acquired from scalp with a multi-channel system. However, multi-channel signals might contain redundant information and increase computational complexity. Furthermore, using only effective channels, rather...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2018.12.004
更新日期:2019-02-01 00:00:00
abstract::An important characterization of neural spiking is the ratio of the variance to the mean of the spike counts in a set of intervals--the Fano factor. For a Poisson process, the theoretical Fano factor is exactly one. For simulated or experimental neural data, the sample Fano factor is never exactly one, but often appea...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2010.04.012
更新日期:2010-06-30 00:00:00
abstract::Currently there is no reliable retrograde tracing technique for visualization of dendritic morphologies of projection neurons. Here we describe a simple and efficient method that can be used to label neurons in Golgi-like fashion. The approach relies on activity-dependent uptake of tracer. For this purpose we inject t...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(93)90055-v
更新日期:1993-10-01 00:00:00
abstract::Cerebrocortical neurons that store and release zinc synaptically are widely recognized as critical in maintenance of cortical excitability and in certain forms of brain injury and disease. Through the last 20 years, this synaptic release has been observed directly or indirectly and reported in more than a score of pub...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2005.11.014
更新日期:2006-06-30 00:00:00
abstract:BACKGROUND:Extracellular recordings are performed by inserting electrodes in the brain, relaying the signals to external power-demanding devices, where spikes are detected and sorted in order to identify the firing activity of different putative neurons. A main caveat of these recordings is the necessity of wires passi...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2014.04.018
更新日期:2014-06-15 00:00:00
abstract::The most common behavioural disorder seen in children and adolescents born extremely prematurely is attention deficit hyperactivity disorder (ADHD). The hyperactive/impulsive sub-type of ADHD or the inattentive sub-type or the hyperactive/impulsive/inattentive sub-type can be evident. These sub-types of ADHD can persi...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2007.01.010
更新日期:2007-11-30 00:00:00
abstract::The usefulness of a number of new stereological principles for unbiased estimation of particle number and sizes and sampling of particles is illustrated together with a novel principle for unbiased estimation of anisotropic surfaces. The examples include descriptions of estimators of neurone and synapse number and siz...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(86)90112-3
更新日期:1986-10-01 00:00:00
abstract::Quantifying the connectivity between arbitrary surface patches in the human brain cortex can be used in studies on brain function and to characterize clinical diseases involving abnormal connectivity. Cortical regions of human brain in their natural forms can be represented in surface formats. In this paper, we presen...
journal_title:Journal of neuroscience methods
pub_type: 临床试验,杂志文章
doi:10.1016/j.jneumeth.2011.02.017
更新日期:2011-04-30 00:00:00
abstract::Matrix metalloproteinases (MMPs) play an important role in the pathogenesis of ischaemic stroke. In particular, the mature forms of MMPs 2 and 9 have similar sizes and share gelatine as a common substrate. Both MMPs are upregulated in ischaemic stroke and play detrimental roles during stroke pathogenesis. Throughout t...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2013.03.007
更新日期:2013-05-30 00:00:00
abstract:BACKGROUND:Microelectrode arrays have been used successfully for neuronal stimulation both in vivo and in vitro. However, in most instances currents required to activate the neurons have been in un-physiological ranges resulting in neuronal damage and cell death. There is a need to develop electrodes which require less...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2015.03.024
更新日期:2015-06-15 00:00:00
abstract::The whole cell patch clamp technique allows recording of membrane currents in an entire cell under voltage clamp conditions. However, technical difficulties arise in large cells bearing extensive processes, such as human fetal dorsal root ganglion (DRG) neurons in culture. In order to improve space clamp conditions, h...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(90)90094-v
更新日期:1990-10-01 00:00:00
abstract::Exceptionally clear Golgi-Nissl sections of 300 micron thickness have been morphometrically studied by light microscopy using oil immersion objectives. The clarity results from a new variation of a staining procedure that combines Golgi and Nissl images in one section. A viewing technique has been developed that permi...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(81)90045-5
更新日期:1981-08-01 00:00:00
abstract::The immunotoxin 192 IgG-saporin has a high degree of selectivity for cholinergic neurons within the basal forebrain (CBF). Intracerebroventricular delivery of 192 IgG-saporin results in a diffuse and massive depletion of choline acetyltransferase (ChAT) activity in projections of the CBF, and non-selective loss of Pur...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/s0165-0270(99)00057-6
更新日期:1999-09-15 00:00:00
abstract::A technique is described for dark-field and light--dark-field illumination of autoradiographic preparations for photomacrogra. A right-angle prism is employed as a substrate through which illumination is introduced to the specimen. The technique permits uniform illumination of large fields of view, and also minimizes ...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(82)90003-6
更新日期:1982-05-01 00:00:00
abstract::The branching patterns of the proximal middle cerebral artery (MCA) and their influence on the infarct size following MCA occlusion in rats were studied. In the proximal part from the level of the olfactory tract, the MCA most often presented one surface branch extending anteriorly, with a variable number of surface b...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(95)00058-5
更新日期:1996-01-01 00:00:00
abstract::The calculation of volume fractions in nervous tissue is a method often used in neuroanatomy. In ontogenetic studies and problems concerning aging, as well as after experimental procedures, volume fractions are calculated in order to quantify the results. Grey level index (GLI) and grey cell coefficient (GCC) are diff...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(82)90014-0
更新日期:1982-07-01 00:00:00
abstract::Effective therapeutic interventions for injuries of the central nervous system such as spinal cord injury are still unavailable, having a great impact on the quality of life of victims and their families, as well as high costs in medical care. Animal models of spinal cord injury are costly, time-consuming and labor-in...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2011.08.024
更新日期:2011-10-15 00:00:00
abstract::In rats with unilateral 6-hydroxydopamine lesions of the substantia nigra apomorphine reliably induces a response of contralateral rotation. The present study shows that this response can readily be conditioned to a test environment which the rats are briefly exposed to during the onset of the apomorphine-induced rota...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(88)90046-5
更新日期:1988-01-01 00:00:00
abstract::Presented in this short communication are design principles for the construction of a positioning apparatus for biological specimens in magnetically sensitive environments. An apparatus with 3 degrees of freedom was built and found to provide position accuracy to within +/- 0.25 mm throughout a cubic volume measuring ...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(92)90112-q
更新日期:1992-08-01 00:00:00
abstract::Prepulse inhibition (PPI) of the acoustic startle response is a measure of sensory motor gating, and is affected in various neuropsychiatric disorders. Although PPI has been used extensively to study both the neural effects of such conditions, as well as in the search for animal models, a number of critical issues hav...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2008.06.014
更新日期:2008-08-30 00:00:00
abstract::In the present study the accumulation of protease resistant prion protein (PrPres) in scrapie-infected neuroblastoma cells (ScN2a cells) was shown to be dependent on culture conditions. The highest levels of PrPres were found in slow growing cells. Further increases in PrPres accumulation were observed in ScN2a cells ...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2004.04.001
更新日期:2004-09-30 00:00:00
abstract::The concentration of free calcium within the lumen of the endoplasmic reticulum ([Ca2+]L) fluctuates between 100 and 1000 microM. High [Ca2+]L provides an electro-driving force for Ca2+ release and supports high Ca2+ diffusion rate within the endoplasmic reticulum lumen. Fluctuations in [Ca2+]L also regulate numerous ...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章,评审
doi:10.1016/s0165-0270(02)00300-x
更新日期:2002-12-31 00:00:00
abstract::Adult rat spinal cords were perfused intracardially with aldehyde fixatives containing either sodium cacodylate or sodium phosphate buffer for EM studies. The perfusion flow rate of 24 cc/min for the first 3 min and 33 cc/min for completion of prefixation was found to be optimal. Ultrastructural examination of the L-1...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(82)90047-4
更新日期:1982-01-01 00:00:00
abstract::The neocortex is the site of origin of several forms of acquired epilepsy. Here we provide a brief review of experimental models that were recently developed to study neocortical epileptogenesis as well as some major results obtained with these methods. Most of neocortical seizures appear to be nocturnal and it is kno...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章,评审
doi:10.1016/j.jneumeth.2015.08.030
更新日期:2016-02-15 00:00:00
abstract::A novel epineural tube implantation paradigm in the adult rat was designed for the analysis of regulatory cell interactions in peripheral nerves and for the development of therapeutic implants. The aim was to allow the integration of synthetic regenerative structures and cells into the nerve interior while preserving ...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2010.04.007
更新日期:2010-06-15 00:00:00
abstract::Ferrets have been extensively used to unravel the neural mechanisms of coding and processing of visual information, and also to identify the developmental mechanisms underlying the emergence of such a complex and fine-tuned neural system. In recent years numerous tools have been generated that allow studying neural sy...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2009.11.016
更新日期:2010-02-15 00:00:00
abstract::The scanning electron microscope (SEM) is a useful tool in the study of the retina of lower vertebrates. SEM analysis (preparation over the critical point) offers a useful addition to the existing histological preparations. It is suitable for a comparative analysis, in which the arrangement of different cellular eleme...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/0165-0270(84)90049-9
更新日期:1984-11-01 00:00:00
abstract:BACKGROUND:A breakthrough in the microglia and macrophages field was the identification of the macrophage colony stimulating factor-1 (CSF-1) as a pro-survival factor. Its pharmacological inhibition in animals depletes rapidly all microglia and macrophages. Microglial depletion in mixed glial cultures has always repres...
journal_title:Journal of neuroscience methods
pub_type: 杂志文章
doi:10.1016/j.jneumeth.2019.108537
更新日期:2020-02-15 00:00:00