abstract：:In many regions of the brain, information is represented by patterns of activity occurring over populations of neurons. Understanding the encoding of information in neural population activity is important both for grasping the fundamental computations underlying brain function, and for interpreting signals that may be...

journal_title：Current opinion in neurobiology

authors： Sanger TD

更新日期：2003-04-01 00:00:00

abstract：:Recent work suggests that radial glial cells represent many, if not most, of the neuronal progenitors in the developing cortex. Asymmetric cell division of radial glia results in the self-renewal of the radial glial cell and the birth of a neuron. Among the proteins that direct cell fate in Drosophila melanogaster tha...

journal_title：Current opinion in neurobiology

authors： Fishell G,Kriegstein AR

更新日期：2003-02-01 00:00:00

abstract：:The discovery of hair cell regeneration in the inner ear of birds provides new optimism that there may be a treatment for hearing and balance disorders. In this review we describe the process of hair cell regeneration in birds; including restoration of function, recovery of perception and what is currently known about...

journal_title：Current opinion in neurobiology

authors： Bermingham-McDonogh O,Rubel EW

更新日期：2003-02-01 00:00:00

abstract：:Despite considerable skepticism, researchers have found that the patterns of muscle activation that control feeding behaviors of lower vertebrates have been surprisingly conserved during evolution. This tendency for conservation among taxa appears in the face of marked flexibility of motor patterns within individuals....

journal_title：Current opinion in neurobiology

authors： Wainwright PC

更新日期：2002-12-01 00:00:00

abstract：:The PTEN tumor suppressor gene is a lipid phosphatase that negatively regulates cell survival mediated by the phosphatidyl inositol 3' kinase-protein kinase B/Akt signaling pathway. Recent in vivo studies have revealed a novel role for PTEN in the size control of neurons. Dysregulation of cell growth control by PTEN i...

journal_title：Current opinion in neurobiology

authors： Backman S,Stambolic V,Mak T

更新日期：2002-10-01 00:00:00

abstract：:Recent technological advances have enabled the use of different optical methods to activate neurons, including 'caged' glutamate, photoactivation of genetically engineered cascades, and direct two-photon excitation. The ability to use light as a stimulation tool provides, in principle, a non-invasive method for the te...

journal_title：Current opinion in neurobiology

authors： Callaway EM,Yuste R

更新日期：2002-10-01 00:00:00

abstract：:The microcircuitry of the neocortex is bewildering in its anatomical detail, but seen through the filters of physiology, some simple circuits have been suggested. Intensive investigations of the cortical representation of orientation, however, show how difficult it is to achieve any consensus on what the circuits are,...

journal_title：Current opinion in neurobiology

authors： Martin KA

更新日期：2002-08-01 00:00:00

abstract：:The generation of a functional neuronal network requires that axons navigate precisely to their appropriate targets. Molecules that specify guidance decisions have been identified, and the signaling events that occur downstream of guidance receptors are beginning to be understood. New research shows that guidance rece...

journal_title：Current opinion in neurobiology

authors： Grunwald IC,Klein R

更新日期：2002-06-01 00:00:00

abstract：:Recent studies suggest that endocannabinoids act as retrograde messengers at many synapses in the central nervous system. Activation of phospholipases, either through calcium-mediated or receptor-mediated signaling, leads to the formation and release of endocannabinoids. These lipophilic signaling molecules diffuse to...

journal_title：Current opinion in neurobiology

authors： Kreitzer AC,Regehr WG

更新日期：2002-06-01 00:00:00

abstract：:Recent data show that the ventral premotor cortex in both humans and monkeys has motor and cognitive functions. The cognitive functions include space perception, action understanding and imitation. The data also show a clear functional homology between monkey area F5 and human area 44. Preliminary evidence suggests th...

journal_title：Current opinion in neurobiology

authors： Rizzolatti G,Fogassi L,Gallese V

更新日期：2002-04-01 00:00:00

abstract：:Recent studies have shown that frontoparietal cortices and interconnecting regions in the basal ganglia and the cerebellum are related to motor skill learning. We propose that motor skill learning occurs independently and in different coordinates in two sets of loop circuits: cortex-basal ganglia and cortex-cerebellum...

journal_title：Current opinion in neurobiology

authors： Hikosaka O,Nakamura K,Sakai K,Nakahara H

更新日期：2002-04-01 00:00:00

abstract：:The adult mammalian neocortex, the major region of the cerebral cortex, is divided into functionally specialized areas, defined by distinct architecture and axonal connections. Extrinsic influences, such as thalamocortical input, and genetic regulation, intrinsic to the dorsal telencephalon, control the gradual emerge...

journal_title：Current opinion in neurobiology

authors： O'Leary DD,Nakagawa Y

更新日期：2002-02-01 00:00:00

abstract：:It is now 15 years since the discovery that N-methyl-d-aspartate receptor activity is required to maintain the refined topographic organization of retinotectal projections. Recent studies have identified additional components of the signaling pathways required for activity-dependent map formation and maintenance. Nitr...

journal_title：Current opinion in neurobiology

authors： Debski EA,Cline HT

更新日期：2002-02-01 00:00:00

abstract：:The rhythmic mandible-generated close-open alternations of the mouth, responsible for the series of consonant-vowel alternations characteristic of babbling and of languages, is receiving increased attention as a possible manifestation of an ontogenetic and phylogenetic 'frame' underlying the serial organization of spe...

journal_title：Current opinion in neurobiology

authors： MacNeilage PF,Davis BL

更新日期：2001-12-01 00:00:00

abstract：:Cellular processes that mediate learning and memory show a remarkable level of conservation between vertebrates and invertebrates. Recent studies have shown that learning and memory formation in invertebrates, so-called 'simple systems', involves a highly complex arrangement of cellular pathways. Some pathways contrib...

journal_title：Current opinion in neurobiology

authors： Burrell BD,Sahley CL

更新日期：2001-12-01 00:00:00

abstract：:The analysis of complex human diseases has been spurred by the number of published genomic sequence variants - many identified in the course of sequencing the human genome. But, to be useful for genetic analysis, variants have to be mapped accurately, their frequencies in various populations determined, and automated ...

journal_title：Current opinion in neurobiology

authors： Nowotny P,Kwon JM,Goate AM

更新日期：2001-10-01 00:00:00

abstract：:It is becoming evident that neurons express an unusual number of molecules that were originally thought to be specific to immune functions. One such molecule, class I major histocompatibility complex, is required in the activity-dependent refinement and plasticity of connections in the developing and adult central ner...

journal_title：Current opinion in neurobiology

authors： Boulanger LM,Huh GS,Shatz CJ

更新日期：2001-10-01 00:00:00

abstract：:Most high-level sensory neurons have complex, nonlinear response properties; a comprehensive characterization of these properties remains a formidable challenge. Recent studies using complex sensory stimuli combined with linear and nonlinear analyses have provided new insights into the neuronal response properties in ...

journal_title：Current opinion in neurobiology

authors： Touryan J,Dan Y

更新日期：2001-08-01 00:00:00

abstract：:Of the few animal groups that learn their vocalizations, songbirds are uniquely amenable to molecular, physiological, and behavioral analyses of the neural features responsible for vocal learning. In order to communicate effectively as an adult, a young songbird recognizes and memorizes a model of his species-specific...

journal_title：Current opinion in neurobiology

authors： White SA

更新日期：2001-08-01 00:00:00

abstract：:Recent work has established that different geometric arrangements of calcium channels are found at different presynaptic terminals, leading to a wide spectrum of calcium signals for triggering neurotransmitter release. These calcium signals are apparently transduced by synaptotagmins - calcium-binding proteins found i...

journal_title：Current opinion in neurobiology

authors： Augustine GJ

更新日期：2001-06-01 00:00:00

abstract：:Functional magnetic resonance imaging (fMRI) and positron emission tomography measure local changes in brain hemodynamics induced by cognitive or perceptual tasks. These measures have a uniformly high spatial resolution of millimeters or less, but poor temporal resolution (about 1s). Conversely, electroencephalography...

journal_title：Current opinion in neurobiology

authors： Dale AM,Halgren E

更新日期：2001-04-01 00:00:00

abstract：:Cell fate in the cephalic neural primordium is controlled by an organizer located at the midbrain-hindbrain boundary. Studies in chick, mouse and zebrafish converge to show that mutually repressive interactions between homeodomain transcription factors of the Otx and Gbx class position this organizer in the neural pri...

journal_title：Current opinion in neurobiology

authors： Rhinn M,Brand M

更新日期：2001-02-01 00:00:00

abstract：:Dendritic patterning exerts a profound influence on neuronal connectivity. Recent studies indicate that mammalian Notch receptors are expressed by postmitotic neurons and that Notch signaling has a considerable influence on dendritic growth and branching. Investigations into the intracellular effectors of dendritic de...

journal_title：Current opinion in neurobiology

authors： Redmond L,Ghosh A

更新日期：2001-02-01 00:00:00

abstract：:Classical eyelid conditioning has been used to great advantage in demonstrating that the cerebellum helps to improve movements through experience, and in identifying the underlying mechanisms. Results from recent studies support the hypotheses that learning occurs in both the cerebellar nucleus and cortex, and that th...

journal_title：Current opinion in neurobiology

authors： Medina JF,Nores WL,Ohyama T,Mauk MD

更新日期：2000-12-01 00:00:00

abstract：:Comparative studies over the past year have revealed two new insights into the role of neuropeptides in the evolution of social behaviors. First, across vertebrate taxa, certain neuropeptide effects appear to be gender-specific. Second, species variations in receptor gene structure can alter neuropeptide receptor dist...

journal_title：Current opinion in neurobiology

authors： Insel TR,Young LJ

更新日期：2000-12-01 00:00:00

abstract：:A recent series of exciting observations, using novel high-resolution time-lapse imaging of living cells, has provoked a major shift in our understanding of the dendritic spine, from a stable storage site of long-term memory to a dynamic structure that undergoes rapid morphological variations. Through these recent obs...

journal_title：Current opinion in neurobiology

authors： Segal M,Andersen P

更新日期：2000-10-01 00:00:00

abstract：:The fruit fly, Drosophila melanogaster, is equipped with a sophisticated olfactory sensory system that permits it to recognize and discriminate hundreds of discrete odorants. The perception of these odorants is essential for the animal to identify relevant food sources and suitable sites for egg-laying. Advances in th...

journal_title：Current opinion in neurobiology

authors： Vosshall LB

更新日期：2000-08-01 00:00:00

abstract：:Neurotransmitters are released by Ca(2+)-triggered exocytotic fusion of synaptic vesicles. Before fusion, vesicles dock at a specialised presynaptic plasma membrane region, the active zone, where they are primed to a fusion competent state. The nature of this priming reaction has long been enigmatic. Recent evidence d...

journal_title：Current opinion in neurobiology

authors： Brose N,Rosenmund C,Rettig J

更新日期：2000-06-01 00:00:00

abstract：:Many constituents of Wnt signaling pathways are expressed in the developing and mature nervous systems. Recent work has shown that Wnt signaling controls initial formation of the neural plate and many subsequent patterning decisions in the embryonic nervous system, including formation of the neural crest. Wnt signalin...

journal_title：Current opinion in neurobiology

authors： Patapoutian A,Reichardt LF

更新日期：2000-06-01 00:00:00

abstract：:Schizophrenia is often associated with cognitive deficits, particularly within the domains of memory and language. Specific cognitive deficits have recently been linked to psychotic phenomena, including verbal hallucinations and disorganized speech. Impairments of working and semantic memory are primarily due to dysfu...

journal_title：Current opinion in neurobiology

authors： Kuperberg G,Heckers S

更新日期：2000-04-01 00:00:00

abstract：:Classical conditioning, the simplest form of associative learning, is one of the most studied paradigms in behavioural psychology. Since the formal description of classical conditioning by Pavlov, lesion studies in animals have identified a number of anatomical structures involved in, and necessary for, classical cond...

journal_title：Current opinion in neurobiology

authors： Büchel C,Dolan RJ

更新日期：2000-04-01 00:00:00

abstract：:Expression of vnd in ventral, ind in intermediate, and msh in dorsal columns of fly neurectoderm, and of homologous gene families in corresponding domains of vertebrate neurectoderm, suggests that elements of dorsoventral neural patterning have been evolutionarily conserved. However, upstream signaling pathways regula...

journal_title：Current opinion in neurobiology

authors： Cornell RA,Ohlen TV

更新日期：2000-02-01 00:00:00

abstract：:Major technical advances in the imaging of live cells have led to a recent flurry of studies demonstrating how dendrites remodel dynamically during development. Taken together with our current understanding of axonal development, these studies help provide a more unified picture of how neural circuits might be formed ...

journal_title：Current opinion in neurobiology

authors： Wong WT,Wong RO

更新日期：2000-02-01 00:00:00

abstract：:The development of motor behaviour depends on the differentiation of underlying circuitry. Recent work with the zebrafish brings the simple swimming behaviour of lower vertebrates and their embryos into focus as a suitable model to study the development of motor circuitry and its genetic control. Changes in connectivi...

journal_title：Current opinion in neurobiology

authors： Bate M

更新日期：1999-12-01 00:00:00

abstract：:Recent psychophysical studies on normal subjects, as well as brain imaging studies, have revised the concepts concerning the mechanisms underlying spatial orientation during navigation tasks. The emphasis has been put on internal models that allow the prediction of a planned trajectory and are essential in the steerin...

journal_title：Current opinion in neurobiology

authors： Berthoz A,Viaud-Delmon I

更新日期：1999-12-01 00:00:00

abstract：:The nervous system is evolutionarily conservative compared to the peripheral appendages that it controls. However, species-specific behaviors may have arisen from very small changes in neuronal circuits. In particular, changes in neuromodulatory systems may allow multifunctional circuits to produce different sets of b...

journal_title：Current opinion in neurobiology

authors： Katz PS,Harris-Warrick RM

更新日期：1999-10-01 00:00:00

abstract：:A number of laboratories have recently refined descriptions of temporal response properties, from the auditory periphery to the midbrain. At many levels of the auditory pathway, the role of inhibition in temporal coding of complex sounds is being explored. In addition, quantitative relationships between physiology and...

journal_title：Current opinion in neurobiology

authors： Carney LH

更新日期：1999-08-01 00:00:00

abstract：:The heated debate over the level of postsynaptic receptor occupancy by transmitter has not been extinguished - indeed, new evidence is fanning the flames. Recent experiments using two-photon microscopy suggest that the concentration of glutamate in the synaptic cleft does not attain levels previously suggested. In con...

journal_title：Current opinion in neurobiology

authors： Bergles DE,Diamond JS,Jahr CE

更新日期：1999-06-01 00:00:00

abstract：:Metabotropic L-glutamate receptors are involved in various forms of synaptic plasticity in the hippocampus. The use of a new antagonist (LY341495) that blocks all known metabotropic L-glutamate receptors in the brain, together with subtype-selective antagonists, has identified multiple roles both for cloned and novel ...

journal_title：Current opinion in neurobiology

authors： Bortolotto ZA,Fitzjohn SM,Collingridge GL

更新日期：1999-06-01 00:00:00

abstract：:Studies of the function of the basal forebrain have focused on cholinergic neurons that project to cortical and limbic structures critical for various cognitive abilities. Recent experiments suggest that these neurons serve a modulatory function in cognition, by optimizing cortical information processing and influenci...

journal_title：Current opinion in neurobiology

authors： Baxter MG,Chiba AA

更新日期：1999-04-01 00:00:00