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Showing posts with the label journals

Use of Multimodal Imaging and Clinical Biomarkers in Carriers of C9orf72 Repeat Expansion

This case-control study examines the use of fluorine 18–labeled fluorodeoxyglucose positron emission tomographic imaging to detect glucose metabolic changes in individuals who are presymptomatic carriers of a mutation in the C9orf72 gene that leads to amyotrophic lateral sclerosis and frontotemporal dementia. from journals https://ift.tt/2ZrWB3c

Oxygen Sensing Comes to the Development of the Cerebellum

In this issue of Neuron, Kullmann et al. (2020) demonstrate that the hypoxic state of the developing cerebellum stimulates Hif1a expression to maintain cell proliferation until vascularization creates normoxic conditions, activating Pard polarity signaling complex genes and stimulating cells to cease proliferation and begin migration. from journals https://ift.tt/3g7gaEc

Charting a Path toward Aggression

Hypothalamic stimulation can elicit complex behaviors such as aggression, but how discrete motor components of such behaviors are organized at the circuit level remains largely unknown. In this issue of Neuron, Falkner et al. (2020) find that complex neural representations get transformed into a simplified action signal along a hypothalamic-midbrain pathway. from journals https://ift.tt/3g5rAbn

The Value of Beliefs

We construct our beliefs to meet two sometimes conflicting goals: forming accurate beliefs to inform our decisions and forming desirable beliefs that we value for their own sake. In this NeuroView, we consider emerging neuroscience evidence on how the brain motivates itself to form particular beliefs and why it does so. from journals https://ift.tt/2XfRFvD

Magnetic Resonance Imaging for Acute Minor Neurological Symptoms

To the Editor An observational study of magnetic resonance imaging (MRI) in acute minor neurological symptoms revealed imaging evidence for acute infarction in 13.5% and revision of clinical diagnosis in 30%. This “implies a considerable percentage of patients’ negative MRI findings resulted in a different diagnosis, likely that a presumed stroke did not exist.” This conclusion is misleading in 2 respects. from journals https://ift.tt/2ROSLg4

Directly to the Point: Dopamine Persistently Enhances Excitability of Direct Pathway Striatal Neurons

In this issue of Neuron, Lahiri and Bevan (2020) investigate the effects of dopamine release on striatal projection neurons. Using perforated patch recordings and optogenetics, they show that dopamine release persistently enhances the intrinsic excitability of direct pathway striatal neurons. from journals https://ift.tt/2VMiYgB

A Backup of Hippocampal Spatial Code outside the Hippocampus? New Light on Systems Memory Consolidation

In this issue of Neuron, Gridchyn et al. (2020) show that by inhibiting memory reactivations of hippocampal place maps during rest, these maps are lost but re-emerge during re-learning, suggesting that alternative extrahippocampal representations can reinstate the original hippocampal map. from journals https://ift.tt/3auwoTu