Abstract：
:Since its introduction in the early 1980s, the concept of a "preferred direction" for neuronal discharge has proven to be a powerful means of studying diverse properties of individual neurons in the motor areas of the brain. More recently, the activity recorded from ensembles of neurons, each with an identified preferred direction, has been used to predict hand movement, both off-line, and in real-time. Our recent experiments have addressed similar issues, but have focused on the relation between primary motor cortical discharge and muscle activity, rather than limb kinematics. We recently introduced the concept of a "muscle-space" preferred direction (PD(M)), that is analogous to the familiar hand-space preferred direction (PD(H)). In this manuscript, we show that there is considerable variety in the direction of these PD(M) vectors across neurons, but that for a given task and neuron, two successive measurements of PD(M) are very similar. We found that these vectors tend to form clusters in particular regions of the muscle space that may reflect neurons that control synergistically important groups of muscles. We have also shown that the discharge measured from neural ensembles can be used to predict the activity of individual muscles, in much the way that kinematic signals have been predicted by other groups. In fact, the accuracy of these predictions is similar to that of kinematic signals, despite the stochastic nature and greater bandwidth of the EMG signals. PD(M)s represent a divergence from one neuron to numerous muscles, while the prediction of muscle activity represents convergence from many neurons to individual muscles. We are continuing to investigate the nature of this complex matrix of functional interconnections.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Morrow MM,Pohlmeyer EA,Miller LEdoi
10.1007/978-0-387-77064-2_9subject
Has Abstractpub_date
2009-01-01 00:00:00pages
179-99eissn
0065-2598issn
2214-8019journal_volume
629pub_type
杂志文章abstract：:Mitochondrial ATPase and adenylate kinase activity of hepatoma cells were inhibited by hematoporphyrin derivative (HPD) followed by photoirradiation. Inhibition of ATPase activity was a dose- and time-related event. Malonaldehyde (MDA) content of mitochondrial membranes was markedly increased by HPD plus light. The co...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4613-2165-1_19
更新日期：1985-01-01 00:00:00
abstract：:Cyanobacteria become increasingly dominant as concentrations of TP and TN increase during eutrophication of lakes, rivers and estuaries. Temporal dynamics of cyanobacteria blooms are variable--in some systems persistent blooms occur in summer to fall, whereas in other systems blooms are more sporadic. Cyanobacteria bl...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-75865-7_33
更新日期：2008-01-01 00:00:00
abstract：:Mutations in the gene Crumbs homolog 1 (CRB1) are responsible for several retinopathies that are diverse in severity and phenotype. Thus, there is considerable incentive to determine how disruption of this gene causes disease. Progress on this front will aid in developing molecular diagnostics that can predict disease...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-27378-1_41
更新日期：2019-01-01 00:00:00
abstract：:The study of patients with movement disorders provides insight into both the functional organization and the neural substrates of the perceptual-motor system. By and large, we feel this source of information has been underutilized within the basic science of motor control. To begin to address this shortcoming, this ch...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-77064-2_19
更新日期：2009-01-01 00:00:00
abstract：:Multiple lines of evidence support a central role of hormones in the etiology of breast, endometrial and ovarian cancers. Evidence of an association between circulating hormones and these cancers varies by both hormone and cancer site, with the most consistent associations observed for sex steroid hormones and breast ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：
更新日期：2008-01-01 00:00:00
abstract：:EPR imaging has emerged as an important tool for noninvasive three-dimensional (3D) spatial mapping of free radicals in biological tissues. Spectral-spatial EPR imaging enables mapping of the spectral information at each spatial position, and, from the observed linewidth, the localized tissue oxygenation can be mapped...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0075-9_12
更新日期：2003-01-01 00:00:00
abstract：:A difficult task for a novice modeler is beginning a modeling project. The methods described here delineate the modeling process step by step. Aristole is quoted as having said "One learns to play the flute by playing the flute," and the same principle holds somewhat for modeling. An excellent means for understanding ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4899-1959-5_2
更新日期：1998-01-01 00:00:00
abstract：:New methods have been developed for the preparation of highly purified gangliosides, homogeneous in the saccharide, long chain base, and fatty acid moieties and gangliosides carrying different kinds of labelled probes. Gangliosides, homogeneous in the oligosaccharide portion, were prepared by preparative normal phase ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4613-1663-3_16
更新日期：1988-01-01 00:00:00
abstract：:Serum levels of tryptophan (Trp) and 5-hydroxytryptophan (5-HTP) were measured in the mother at birth, by normal delivery or cesarean section, on days 1 and 3 post-partum, and in the cord blood of the fetus-newborns. Decreases in Trp and 5-HTP levels during delivery were noted. Conversely, Trp levels in the cord blood...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0135-0_90
更新日期：2003-01-01 00:00:00
abstract：:Human heart rate variability (HRV) was examined during a mild respiratory acidosis induced by inhalation of a normoxic hypercapnic gas mixture. On two separate occasions, separated by 72 but not more than 120hr, ECG was recorded from 9 normotensive subjects during supine rest. ECG was recorded for 20 min breathing roo...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-73693-8_63
更新日期：2008-01-01 00:00:00
abstract：:Though soft tissue disorders have been recognized and described to some detail in several types of domestic animals and small mammals for some years, not much progress has been made in our understanding of the biochemical basis and pathogenesis of these diseases in animals. Ehlers-Danlos syndrome described in dogs alr...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-007-7893-1_14
更新日期：2014-01-01 00:00:00
abstract：:Although the gasotransmitter hydrogen sulfide (H(2)S) generally dilates systemic arteries in mammals, it causes constriction of pulmonary arteries. In isolated rat pulmonary arteries, we have shown that the H(2)S precursor cysteine enhances both hypoxic pulmonary vasoconstriction and tension development caused by the ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-18440-1_10
更新日期：2015-01-01 00:00:00
abstract：:With the rapid advancement of high-throughput DNA sequencing technologies, genomics has become a big data discipline where large-scale genetic information of human individuals can be obtained efficiently with low cost. However, such massive amount of personal genomic data creates tremendous challenge for privacy, espe...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-6041-0_8
更新日期：2017-01-01 00:00:00
abstract：:DNA methyltransferases (MTases) uniquely combine the ability to recognize and covalently modify specific target sequences in DNA using the ubiquitous cofactor S-adenosyl-L-methionine (AdoMet). Although DNA methylation plays important roles in biological signaling, the transferred methyl group is a poor reporter and is...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-43624-1_19
更新日期：2016-01-01 00:00:00
abstract：:In summary, we have demonstrated that the ocular surface epithelia express at least three mucin genes. We suggest that the gel-forming mucin MUC5AC is a major mucin forming the mucus gel of the tear film. We further suggest that MUC1 facilitates the spread of the MUC5-containing mucus on the ocular surface and, along ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-5359-5_32
更新日期：1998-01-01 00:00:00
abstract：:1,25-Dihydroxyvitamin D3 receptors are cytosoluble proteins detectable in a variety of tissues responsive to 1,25(OH)2D3. They are DNA binding-proteins analogous to other steroid receptors and it is this functional property which is likely involved in the activation of hormone-sensitive genes. Utilizing 1,25(OH)2D3 an...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4684-5101-6_25
更新日期：1986-01-01 00:00:00
abstract：:1. The age and sex distribution of the SUA of the Japanes people was the same as of the Caucasians. 2. The prevalence of gout was 0.4% of all the subjects, in adult male it was 1.2% and 76.4% in hyperuricemia above 10.0 mg/dl. 3. The incidence of a year throughout this population study was 0.02% per population. 4. Ser...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-9140-5_25
更新日期：1980-01-01 00:00:00
abstract：:The processes of bone growth and turnover are tightly regulated by the actions of various signaling molecules, including hormones, growth factors, and cytokines. Imbalances in these processes can lead to skeletal disorders such as osteoporosis or high bone mass disease. It is becoming increasingly clear that serotonin...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-66653-2_3
更新日期：2017-01-01 00:00:00
abstract：:While melanoma is less common than some other skin cancers, it is responsible for nearly 10,000 deaths in the USA each year alone. For many decades, very limited treatment options were available for patients with metastatic melanoma. However, recent breakthroughs have brought new hopes for patients and providers. Whil...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-41008-7_3
更新日期：2020-01-01 00:00:00
abstract：:The failure of complete remissions to reliably translate into cures in acute myeloid leukemia (AML) can be explained by the leukemia stem cell (LSC) paradigm, which hypothesizes that rare leukemia cells with stem cell features, including self-renewal capacity and drug resistance, are primarily responsible for both dis...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-14366-4_9
更新日期：2019-01-01 00:00:00
abstract：:Vascular endothelial cells (ECs) and smooth muscle cells (VSMCs) are constantly exposed to hemodynamic forces in vivo, including flow shear stress and cyclic stretch caused by the blood flow. Numerous researches revealed that during various cardiovascular diseases such as atherosclerosis, hypertension, and vein graft,...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-96445-4_4
更新日期：2018-01-01 00:00:00
abstract：:Recent advances in regenerative medicine and cell-based therapy are bringing promising perspectives for the use of stem cells in clinical trials. Stem cells are undifferentiated cells capable of multilineage differentiation and available in numerous sources in the human body. Dental pulp constitutes an attractive sour...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/5584_2017_71
更新日期：2018-01-01 00:00:00
abstract：:The possibility that weakly binding bridges are attached to actin in the absence of Ca2+ under physiological conditions was investigated by studying the force response of unstimulated intact muscle fibres of the frog to fast ramp stretches. The force response during the stretching period is divided into two phases: ph...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-2872-2_62
更新日期：1993-01-01 00:00:00
abstract：:Cardiovascular diseases are the leading cause of mortality rates throughout the world. Next to an insufficient number of healthy donors, this has led to increasing numbers of patients on heart transplant waiting lists with prolonged waiting times. Innovative technological advancements have led to the production of ven...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/5584_2018_145
更新日期：2018-01-01 00:00:00
abstract：:Drug resistance is best thought of as an ongoing biological process. Resistant bacteria must emerge, become established and ultimately transmit in order to be relevant to human health. In this context, genetic diversity can influence the rate and likelihood of resistance emerging; it can also modulate the net physiolo...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-64371-7_14
更新日期：2017-01-01 00:00:00
abstract：:Inhibition of human phospholipases A2 by cis-unsaturated fatty acids and their oxidative metabolites and/or polymers was studied using partially purified human phospholipases A2 and [1-14C]oleate labelled, autoclaved E. coli as substrate. As previously reported for other phospholipases A2, oleic and arachidonic acids ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4613-0651-1_15
更新日期：1990-01-01 00:00:00
abstract：:Our current understanding of focal seizures strongly suggests a model of damage and associated synaptic reorganization that leads to periodic 'spontaneous' hyperexcitation and/or sustained firing that generates seizures. Our working model of a human epileptic focus assumes that there will often be inexcitability near ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-7971-3_8
更新日期：1986-01-01 00:00:00
abstract：:Cyclic GMP phosphodiesterase (PDE6) is a key enzyme in vertebrate retinal phototransduction. After GTP/GDP exchange on the a subunit of transducin (Talpha) by illuminated rhodopsin, the GTP-bound form Talpha (GTP/Talpha) interacts with the regulatory subunit (Pgamma) of PDE6 to activate cGMP hydrolytic activity. The r...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-0121-3_9
更新日期：2002-01-01 00:00:00
abstract：:Ceramides are bioactive sphingolipids that support the structure of the plasma membrane and mediate numerous cell-signaling events in eukaryotic cells. The finding that ceramides act as second messengers transducing cellular signals has attracted substantial attention in several fields of Biology. Since all cells cont...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-21735-8_15
更新日期：2019-01-01 00:00:00
abstract：:Animal models are an important tool to study the pathophysiology of Machado-Joseph Disease (MJD). So far, animal models using simple organisms (like the round worm Caenorhabditis elegans or the fruit fly drosophila) but also mammalian models (mouse and even a non-human primate model) have been generated to study MJD. ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-71779-1_15
更新日期：2018-01-01 00:00:00
