Articles in 2024

Astrocytes have important roles in disease. However, modulation of their reactive state is challenging. Here the authors present a phenotypic in vitro screening platform they can leverage to identify chemical compounds able to modulate astrocyte reactivity in vitro and in vivo.

Using single-neuron recordings in patients with epilepsy, Kunz et al. show that stimulus-specific neurons activate together during hippocampal ripples when humans encode and retrieve associative memories.

Radke et al. found an interferon response in the brainstem nuclei of acute COVID-19 that, in addition to the inflammatory reaction, spreads throughout the vascular unit altering glial cells and resolves in late disease states in the absence of brain infection.

The Sehgal lab presents data showing that the non-cell autonomous pathway of glial lipid droplet formation occurs during sleep and helps to resolve neuronal reactive oxygen species (ROS). This promotes neuronal function after an active day. Hence, this pathway has an important physiological function beyond its previously described role in ROS-associated diseases, including Alzheimer’s disease.

Both caloric restriction and obesity affect autoimmune diseases. The activation of brainstem neurons in the ventrolateral medulla (VLM) with fasting suppresses experimental autoimmune diseases. Stimulation of VLM neurons alters T cell traffic by redistributing immune cells to bone marrow and reduces inflammatory cytokine production, thus providing therapy of experimental autoimmunity.

Haynes et al. report a daily, sleep-dependent neuron–glia lipid metabolic cycle. ApoE-dependent lipid transfer from neurons to glia protects neurons from oxidative damage during waking, and lipids are cleared from glia during sleep.

Despite a long history of studying perceptual biases in neuroscience, many of the biases remain difficult to explain and even appear to be contradictory. The authors propose a unifying theory that sheds new light on such puzzling perceptual biases.

Muller et al. demonstrate that reward signals recorded from the frontal cortex of nonhuman primates exhibit a population-based scheme for learning probability distributions over reward values. This study provides evidence that neural signals outside of the midbrain reflect the principles of distributional reinforcement-learning theory.

As Nature Neuroscience celebrates its 25th anniversary, we are having conversations with both established leaders in the field and those earlier in their careers to discuss how the field has evolved and where it is heading. This month we are talking to Nancy Ip, Morningside Professor of Life Science and president of the Hong Kong University of Science and Technology. We discussed her path from academia to industry and back, her experiences as a working mother and how she has helped scientific research in Hong Kong to flourish.

Wang et al. identify a molecularly defined tetra-synaptic pathway for olfaction-evoked innate fear and anxiety in mice. These findings reveal a forebrain-to-hindbrain neural substrate for sensory-triggered fear and anxiety that bypasses the amygdala.

Minakuchi et al. find that separable inhibitory inputs to a critical hypothalamic aggression-control node can influence the evolution of an aggressive state by independently modulating either the motivational phase or the action phase.

The basal ganglia control the execution of motor actions. However, how they engage spinal motor networks is unclear. Here the authors show that the basal ganglia–spinal cord pathway controls locomotor asymmetries in adult mice.

Using in vivo calcium imaging and cell-type-specific pharmacology, we reveal that synaptic inhibition in the cerebellar granule cell layer supports pattern separation and cerebellum-dependent behavior.

Mohebi et al. report that dopamine (DA) pulses in different rat striatal subregions signal prediction errors across different timescales. In this way, one learning process may achieve a range of adaptive behaviors.

The authors show that sound-evoked activity in mouse visual cortex consists of both an auditory and a motor component. These have different temporal and spatial profiles (across neurons and layers) but limited impact on ongoing visual processing.

A widespread group of cerebellar projections form monosynaptic excitatory synapses with neurons throughout the substantia nigra pars compacta (SNc). These projections contain information associated with movement and reward and can rapidly increase SNc neuron activity, and thereby basal ganglia dopamine levels, which contribute to movement initiation, vigor and reward processing.

Using dopamine photometry and reinforcement learning models in mice flexibly acquiring cue–action–outcome associations with rule switches, Bernklau et al. show that striatal dopamine reflects an animal’s current understanding of their task.