Tools
Sorted by:
Try your query at:
 |
 |
 |
 |
 |
 |
Results 1 - 10
of
948
Electrophysiological correlates of rapid spatial orienting towards fearful faces
- Cereb. Cortex
, 2004
"... We investigated the spatio-temporal dynamic of attentional bias towards fearful faces. Twelve participants performed a covert spatial orienting task while recording visual event-related brain potentials (VEPs). Each trial consisted of a pair of faces (one emotional and one neutral) briefly presented ..."
Abstract
-
Cited by 106 (6 self)
- Add to MetaCart
validity: the lateral occipital P1 component (~130 ms post-stimulus) was selectively increased when a bar replaced a fearful face compared to when the same bar replaced a neutral face. This effect was not found with upright happy faces or inverted fearful faces. A similar amplification of P1 has previously
Behavioral theories and the neurophysiology of reward,
- Annu. Rev. Psychol.
, 2006
"... ■ Abstract The functions of rewards are based primarily on their effects on behavior and are less directly governed by the physics and chemistry of input events as in sensory systems. Therefore, the investigation of neural mechanisms underlying reward functions requires behavioral theories that can ..."
Abstract
-
Cited by 187 (0 self)
- Add to MetaCart
the expected value (EV) of the probability distribution and thus the theoretically expected payoff of an option, according to EV = i (p i · x i ); i = 1, n; n = number of rewards. With increasing numbers of trials, the measured mean of the actually occurring distribution will approach the expected value
Cortical sources of the early components of the visual evoked potential
- Human Brain Mapping
, 2002
"... r r Abstract: This study aimed to characterize the neural generators of the early components of the visual evoked potential (VEP) to isoluminant checkerboard stimuli. Multichannel scalp recordings, retinotopic mapping and dipole modeling techniques were used to estimate the locations of the cortical ..."
Abstract
-
Cited by 114 (8 self)
- Add to MetaCart
occipital gyrus, while the late phase of the P1 component (onset latency 110–120 msec; peak latency 136–146 msec) was localized to ventral extrastriate cortex of the fusiform gyrus. Among the N1 subcomponents, the posterior N150 could be accounted for by the same dipolar source as the early P1, while
The N2pc component as an indicator of attentional selectivity
- Electroencephalography and Clinical Neurophysiology
, 1996
"... Event-related potentials (ERPs) were recorded during visual discrimination tasks in which stimulus arrays were presented that contained one lateral target and 3 (experiment 1) or one (experiments 2 and 3) non-targets. In experiments 1 and 2, targets differed from non-targets with respect to their fo ..."
Abstract
-
Cited by 91 (12 self)
- Add to MetaCart
Event-related potentials (ERPs) were recorded during visual discrimination tasks in which stimulus arrays were presented that contained one lateral target and 3 (experiment 1) or one (experiments 2 and 3) non-targets. In experiments 1 and 2, targets differed from non-targets with respect
Frontal–Occipital Connectivity During Visual Search
"... Although expectation- and attention-related interactions between ventral and medial prefrontal cortex and stim-ulus category-selective visual regions have been identified during visual detection and discrimination, it is not known if similar neural mechanisms apply to other tasks such as visual sear ..."
Abstract
- Add to MetaCart
. These connectivity findings extend previous models of visual search processes to include specific frontal–occipital neuronal interactions during a natural and complex search task. Key words: diffusion tensor imaging; dynamic causal modeling; fMRI; independent component analysis; lateral occipital cortex; object
Whom You Know Matters: Venture Capital Networks and Investment Performance,
- Journal of Finance
, 2007
"... Abstract Many financial markets are characterized by strong relationships and networks, rather than arm's-length, spot-market transactions. We examine the performance consequences of this organizational choice in the context of relationships established when VCs syndicate portfolio company inv ..."
Abstract
-
Cited by 138 (8 self)
- Add to MetaCart
and VC j, and zero otherwise. VC i's eigenvector centrality is then defined as ev i = Σ j p ij ev j (which is equivalent to the components of the principal eigenvector of the adjacency matrix). 8 In our setting, eigenvector centrality measures the extent to which a VC is connected to other well
Anonymous Hierarchical Identity-Based Encryption (Without Random Oracles). In: Dwork
- CRYPTO 2006. LNCS,
, 2006
"... Abstract We present an identity-based cryptosystem that features fully anonymous ciphertexts and hierarchical key delegation. We give a proof of security in the standard model, based on the mild Decision Linear complexity assumption in bilinear groups. The system is efficient and practical, with sm ..."
Abstract
-
Cited by 119 (10 self)
- Add to MetaCart
that e(g r ,ĝ s ) = e(g,ĝ) r s . Here, G,Ĝ, and G T are all multiplicative groups of prime order p, respectively generated by g,ĝ, and e(g,ĝ). We assume an efficient generation procedure that on input a security parameter Σ ∈ N outputs G $ ← Gen(1 Σ ) where log 2 (p) = Θ(Σ). We write Z p = Z/p
Dynamics of gray matter loss in Alzheimer’s disease
- Journal of Neuroscience
, 2003
"... We detected and mapped a dynamically spreading wave of gray matter loss in the brains of patients with Alzheimer’s disease (AD). The loss pattern was visualized in four dimensions as it spread over time from temporal and limbic cortices into frontal and occipital brain regions, sparing sensorimotor ..."
Abstract
-
Cited by 105 (15 self)
- Add to MetaCart
deficits later (�15 % loss). The maps distinguished different phases of AD and differentiated AD from normal aging. Local gray matter loss rates (5.3 � 2.3 % per year in AD v 0.9 � 0.9 % per year in controls) were faster in the left hemisphere ( p � 0.029) than the right. Transient barriers to disease
OnabotulinumtoxinA Nerve Blocks in the Treatment of Occipital Neuralgia A
"... Abstract Occipital neuralgia is characterized by severe pain, accompanied by tenderness and trigger points, in the distribution of the greater, lesser, and/or third occipital nerves. Occipital neuralgia is typically idiopathic, but also is characterized as a common form of posttraumatic headache. T ..."
Abstract
- Add to MetaCart
with ONA exhibited significant decreases in average VAS pain scores from 4.1 ± 2.6 pre-procedure to 2.1 ± 2.4 post-procedure (p = 2 × 10 −5 ), and 3.0 ± 2.5 4 weeks later (p = 0.0234). Mean overall relief was 75.8% ± 25.0%. Treatment with local anesthetic suggested equally efficacious reduction of VAS
OCCIPITAL INFARCTION REVEALED BY QUADRANOPSIA FOLLOWING SNAKEBITE BY BOTHROPS LANCEOLATUS
"... Abstract. We report a case of snakebite in which envenomation was manifested through impairment of the visual field. The patient, a 46-year-old man, was bitten on the right thumb by Bothrops lanceolatus. Treatment with a specific equine antivenom (Bothrofav) was administered one hour after the bite. ..."
Abstract
- Add to MetaCart
. With the exception of fang marks, the results of a clinical examination, particularly the neurologic component, were normal. The day after the bite, the patient developed an inferior left lateral homonymous quadranopsia with macular epargne. T2 magnetic resonance imaging showed a right occipital infarction. His
Results 1 - 10
of
948
