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Mashup Score: 7
Nature Neuroscience – The layout of cortical systems varies across people, which is assumed to be largely due to border shifts between nearby systems. Dworetsky et al. reveal a qualitatively…
Source: www.nature.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 12
The question of whether the early visual cortex (EVC) is involved in visual mental imagery remains a topic of debate. In this paper, I propose that the inconsistency in findings can be explained by the unique challenges associated with investigating EVC activity during imagery. During perception, the EVC processes low-level features, which means that activity is highly sensitive to variation in visual details. If the EVC has the same role during visual mental imagery, any change in the visual details of the mental image would lead to corresponding changes in EVC activity. Within this context, the question should not be whether the EVC is ‘active’ during imagery but how its activity relates to specific imagery properties. Studies using methods that are sensitive to variation in low-level features reveal that imagery can recruit the EVC in similar ways as perception. However, not all mental images contain a high level of visual details. Therefore, I end by considering a more nuanced view
Source: www.mdpi.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 19
Fang et al. discovered that male and female mice display different empathic behaviors in response to others’ pain. Specifically, males engage in self-grooming, whereas females demonstrate social approaching. Processing information about others’ pain involves distinct neural circuits for each sex. Importantly, these circuits inherently differ in gene expression patterns.
Source: www.cell.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 25
We feel that we perceive events in the environment as they unfold in real-time. However, this intuitive view of perception is impossible to implement in the nervous system due to biological constraints such as neural transmission delays. I propose a new way of thinking about real-time perception: at any given moment, instead of representing a single timepoint, perceptual mechanisms represent an entire timeline. On this timeline, predictive mechanisms predict ahead to compensate for delays in incoming sensory input, and reconstruction mechanisms retroactively revise perception when those predictions do not come true.
Source: www.cell.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 116How Men and Women Rate Each Other on Dating Websites - 2 day(s) ago
Men find women more attractive than women find men
Source: www.stevestewartwilliams.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 7
Nature Neuroscience – The layout of cortical systems varies across people, which is assumed to be largely due to border shifts between nearby systems. Dworetsky et al. reveal a qualitatively…
Source: www.nature.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 5
Au sommaire de votre magazine, les principales découvertes et avancées scientifiques sont décryptées par nos journalistes.
Source: www.science-et-vie.comCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 4
Sonic hedgehog (Shh) is an axon guidance molecule that can act as either a chemorepellent or a chemoattractant, depending on the neuron type and their developmental stage. In the developing spinal cord, Shh initially attracts commissural axons to the floor plate and later induces their repulsion after they cross the midline. In the developing visual system, Shh repels ipsilateral retinal ganglion cell (iRGC) axons at the optic chiasm. Although Shh requires the endocytic adaptor Numb for attraction of commissural neurons, the molecular mechanisms underlying Shh’s dual function in attraction and repulsion are still unclear. In this study, we investigate whether Numb also regulates repulsive axon guidance. We show that Numb is essential for two Shh-mediated repulsion processes: iRGC axon repulsion at the optic chiasm and antero-posterior commissural axon repulsion in the spinal cord. Therefore, Numb is required for Shh-mediated attraction and repulsion. These results position Numb as a ce
Source: www.biorxiv.orgCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 5Mating proximity blinds threat perception - 3 day(s) ago
Romantic engagement can bias sensory perception. This ’love blindness’ reflects a common behavioral principle across organisms: favoring pursuit of a coveted reward over potential risks. In the case of animal courtship, such sensory biases may support reproductive success but can also expose individuals to danger, such as predation. How do neural networks balance the trade-off between risk and reward? Here, we discover a dopamine-governed filter mechanism in male Drosophila that reduces threat perception as courtship progresses. We show that during early courtship stages, threat-activated visual neurons inhibit central courtship nodes via specific serotonergic neurons. This serotonergic inhibition prompts flies to abort courtship when they see imminent danger. However, as flies advance in the courtship process, the dopaminergic filter system reduces visual threat responses, shifting the balance from survival to mating. By recording neural activity from males as they approach mating, we
Source: www.biorxiv.orgCategories: General Medicine News, Future of MedicineTweet
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Mashup Score: 2AN EMERGING BOOK - 3 day(s) ago
AN EVOLVING TABLE OF CONTENTS 0. Introduction 1. Manifesto 2. 12 Theses 3. The Age of Machines 4. Death to the Demon 5. A Large World 6. Mechanistic Maps 7. Church-Turing-Deutsch 8. The Lost…
Source: www.expandingpossibilities.orgCategories: General Medicine News, Future of MedicineTweet
RT @sha_zhiqiang: Two common and distinct forms of variation in human functional brain networks https://t.co/pxJkSn80zj