Neuroscience

Evaluation Summary:

The methods presented in this work are of potential broad interest across different domains of human neuroscience. Reliable methods for pushing the limits of spatial resolution for mesoscopic scale imaging of the living human cortex are of wide interest and utility. The image quality and high-spatial resolution of the data are exceptionally high. The paper in its current form demonstrates the application of the developed methods to a few exemplary cortical regions and sequences.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. Reviewer #1 agreed to share their name with the authors.)

Evaluation Summary:

This paper will be of interest to basic and clinical neurophysiologists who are focused on understanding neural mechanisms that influence recovery following spinal cord injury (SCI). The work compares the afferent regulation of motor output to soleus muscle in controls and individuals with SCI. The results indicate differences between groups such that there is less facilitation in the SCI group during muscle contraction.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. Reviewer #1 and Reviewer #3 agreed to share their name with the authors.)

Evaluation Summary:

This study examined the nature of projections from the prefrontal cortex (PFC) to the nucleus accumbens (NAc) and to the ventral tegmental area (VTA). The authors show that PFC projections to NAc and VTA are largely non-overlapping, originate in different layers of PFC, and express different molecular markers. This study provides high-quality data to the long-standing question.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. The reviewers remained anonymous to the authors.)

Evaluation Summary:

This manuscript shows that it is possible to detect high-abundance peptide antigens in nerve cells at the electron microscope (EM) level in sections of formaldehyde-fixed monkey brain after the sections have been stored for several years in an antifreeze solution in the freezer. The topic of utilizing formalin fixed tissue for research, especially with the numerous "brain banks" worldwide, is an important topic especially if one wishes to conduct studies in post mortem human tissue. The authors used antibodies to detect the presence of vasopressin gene-related products (i.e., neurophysin II and copeptin) in the hypothalamus and pituitary of the monkey brain. This paper is of interest to anatomists who work on AVP neurons in non-human primate. Due to issues with tissue quality, methodology and interpretation, the experimental approach described in this paper may not be as useful for studying fixed and archived brain sections as the authors conclude.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. Reviewer #3 agreed to share their name with the authors.)

Evaluation Summary:

This manuscript will be interesting for people performing all optical electrophysiology. It describes a new combination of previously available genetic tools to allow simultaneous optogenetic manipulation and optical electrophysiology. The manuscript does not provide a major conceptual advance but provides good evidence that this assay can be employed for large-scale screening in hIPSC-derived neurons.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript.The reviewers remained anonymous to the authors.)

Evaluation Summary:

In their manuscript, Eira et al. investigate the role of transthyretin in promoting axon elongation by modulating microtubule dynamics. The data point to a possible role of transthyretin in regulating microtubule dynamics by modulating tubulin acetylation levels during axon outgrowth. With additional support to strengthen this conclusion, the paper will be of interest to those in the neurodevelopment, neurodegeneration, and microtubule cytoskeleton fields.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript.The reviewers remained anonymous to the authors.)

Evaluation Summary:

This behavioural study in healthy participants examines how people trade-off a brief phasic pain stimulus with a monetary reward, reporting a quadratic effect of pain on decision making. It supports and adds to previous findings of a context-dependency deriving from the distribution of rewards, which is a deviation from conventional rational choice theory (which proposes that a particular level of pain should carry the same price, regardless of small context changes). Broadly, the reviewers found the work well executed and the data compelling, but there were some suggestions for alternative explanations that are not ruled out given the current data.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. Reviewer #1 agreed to share their name with the authors.)

Evaluation Summary:

Menicucci et al. investigate the implication of sleep in the maintenance of ocular dominance plasticity in adult humans. This is an interesting study as it shows that sleep can maintain the changes in ocular dominance obtained after applying an eye-path on the dominant eye for two hours. This contrasts with the rapid decline of these changes during quiet wake in darkness. The authors further report correlations between sleep oscillations and the magnitude of the plasticity effect. These results highlight a possible implication of sleep in a new form of plasticity

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. The reviewers remained anonymous to the authors.)

Evaluation Summary:

In this study, the role of different cortical areas on three distinct tasks all relying on the same virtual maze set-up was examined using optogenetic interventions and calcium imaging. The paper is potentially of interest to people interested in understanding the neural substrates of learning and how these can be impacted by previous knowledge and experience of stimuli. It could also be of use to behavioral neuroscientists when considering possible order effects of experiments.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. Reviewer #1 agreed to share their name with the authors.)

Evaluation Summary:

This manuscript probes the mechanism of postsynaptic retinoic acid (RA) signaling on presynaptic function. BDNF has important roles in synaptic plasticity, but how retrograde BDNF signaling is controlled following synaptic inactivity is unclear. The authors use genetic tools to localize the action of different components of the pathway to pre- or post-synaptic compartments and use biochemical approaches to define a molecular link between retinoic acid and local translation of distinct BDNF transcripts. The findings presented here fill a gap in our knowledge regarding how presynaptic function is adaptively modulated by BDNF by highlighting the role of RA in this process. The experiments have been well-executed and the data provide compelling support for the model proposed by the authors.

(This preprint has been reviewed by eLife. We include the public reviews from the reviewers here; the authors also receive private feedback with suggested changes to the manuscript. Reviewer #1 and Reviewer #2 agreed to share their names with the authors.)