Ravi S. Menon

Phosphorylated -Synuclein shapes changes in brain structure, task-related activity and functional connectivity in M83 mice

This study shows that pS129 accumulation in M83 mice leads to structural atrophy, reduced functional connectivity, and hypoactivation in somatosensory areas.

Myelin maturation failure and oligodendrocyte precursor loss underlie default mode network disruption in a humanized APP knock-in model of Alzheimers disease

This study identifies myelin maturation failure and oligodendrocyte precursor loss as underlying causes of default mode network disruption in an Alzheimer's disease mouse model.

α-synuclein pathology drives multi-scale reorganization of fronto-limbic networks and cognitive flexibility in the common marmoset

This study tracks how striatal α-synuclein seeding affects brain networks and cognitive flexibility in marmosets, showing multi-scale reorganization and impaired cognitive flexibility.

Mapping Functional Homologies Between Human and Marmoset Brain Networks Using Movie-Driven Ultra-High Field fMRI

This study uses movie-driven fMRI to compare functional brain networks between humans and marmosets, finding conserved sensory networks but species-specific higher-order cognition networks.

Stimulus-modulated approach to steady-state: A new paradigm for event-related fMRI.

This paper introduces a stimulus-modulated approach to steady-state in fMRI to improve sensitivity by using initial high tSNR volumes, reducing trial numbers needed for statistical thresholds.

Modular dynamics of conscious and unconscious states in marmoset cortex

This study examines how isoflurane affects functional brain networks in marmosets, finding reduced network dynamics and increased similarity to anatomical structure under anaesthesia.

Multiplexed BOLD oscillations reveal the interplay of normalization and attention

This study uses frequency-tagged fMRI to show that visual cortical responses are suppressed during inattention and enhanced during attention, supporting the normalization model of attention.

Attentional enhancement and suppression of stimulus-synchronized BOLD oscillations

This study uses frequency-tagging fMRI to show that directed attention enhances anti-phase BOLD oscillations and suppresses in-phase oscillations in visual cortex, supporting the biased competition model of attention.

An Open Access Resource for Marmoset Neuroscientific Apparatus

The paper provides open-access CAD files and software for marmoset neuroscience apparatus, reducing the need for individual lab development.

A non-invasive approach to awake mouse fMRI compatible with multi-modal techniques

This paper introduces a non-invasive restraint for awake mouse fMRI that is compatible with multi-modal techniques, showing comparable data quality to conventional methods.

Frequency-tagged fMRI: A platform for fine-grained spatiotemporal analysis of cortical function

This paper develops and validates a dual-frequency tagging fMRI protocol to enable fine-grained spatiotemporal analysis of cortical function, revealing detailed cortical topographies and temporal synchronization.

Unique cortical and subcortical activation patterns for different conspecific calls in marmosets

The paper shows different marmoset vocalizations activate distinct neural networks in the brain, suggesting specific processing for each call type.

Vocal processing networks in the human and marmoset brain

This study compares vocal processing networks in humans and marmosets using fMRI, revealing shared and species-specific auditory pathways for vocalization processing.

Identifying Functional Homologues in Human and Marmoset Brain Networks via Movie-Driven Ultra-High Field fMRI

This study uses movie-driven fMRI to identify homologous functional brain networks in marmosets and humans, revealing shared neurofunctional architecture across species.

Brain Charts for the Rhesus Macaque Lifespan

This study creates normative brain growth charts for rhesus macaques across their lifespan using MRI data, revealing developmental milestones and cross-species comparisons with humans.

No Replication of Direct Neuronal Activity-related (DIANA) fMRI in Anesthetized Mice

The paper attempts to replicate DIANA fMRI findings in anesthetized mice but fails to observe direct neuronal activity-like peaks, suggesting potential artifacts or data pre-selection issues.

Gaze patterns and brain activations in humans and marmosets in the Frith-Happe; theory-of-mind animation task

This study compares gaze patterns and brain activations in humans and marmosets during ToM and Random Frith-Happe animations, finding similar processing differences.

A vocalization-processing network in marmosets

This study identifies a fronto-temporal vocalization-processing network in marmosets using fMRI, suggesting it is ancestral to the human language network.

Layer Dependence of Monocular and Binocular Responses in Human Ocular Dominance Columns at 7T using VASO and BOLD

This study examines layer dependence of monocular and binocular responses in human V1 using VASO and BOLD at 7T, finding that VASO better differentiates columnar responses and BOLD signal is confounded by pial veins.

Simultaneous functional MRI of socially interacting marmosets

This paper introduces a method to simultaneously measure whole-brain activation in two socially interacting marmoset monkeys using functional MRI and finds neuronal synchrony in brain regions involved in social processing.

Functional organization of frontoparietal cortex in the marmoset investigated with awake resting-state fMRI

This study investigates the functional organization of frontoparietal networks in marmosets using resting-state fMRI, finding patterns similar to macaques.

Interspecies activation correlations reveal functional correspondences between marmoset and human brain areas

This study uses movie-driven fMRI to identify whole-brain functional correspondences between marmosets and humans, finding conserved higher-order visual areas but species-specific responses to animal faces.

Structural alterations in the macaque frontoparietal white matter network after recovery from prefrontal cortex lesions

This study examines structural white matter changes in macaques after prefrontal cortex lesions and finds that recovery is associated with changes in fractional anisotropy in specific fiber tracts.

Muting, not fragmentation, of functional brain networks under general anesthesia

This paper shows that apparent fragmentation of brain networks under anesthesia is due to reduced functional connectivity, not structural changes.

Cortico-subcortical functional connectivity profiles of resting-state networks in marmosets and humans

This study compares cortico-subcortical functional connectivity in marmosets and humans using resting-state fMRI, finding both similarities and species-specific differences in network patterns.

Face selective patches in marmoset frontal cortex

This study identifies face-selective patches in the frontal cortex of marmosets, suggesting a conserved neural network for social face processing across primate lineages.

Effects of MP2RAGE B1+ sensitivity on inter-site T1 reproducibility and morphometry at 7T

This paper investigates how MP2RAGE sequence parameters affect T1 reproducibility and morphometry across sites, showing that B1+ inhomogeneities significantly impact results and that corrections improve comparability.

Direct visualization and characterization of the human zona incerta and surrounding structures

This paper uses high-resolution MRI to visualize and characterize the human zona incerta and surrounding brain structures in vivo.

Dynamic reconfiguration, fragmentation and integration of whole-brain modular structure across depths of unconsciousness

This study examines how increasing doses of isoflurane affect whole-brain modular structure in nonhuman primates, finding increased module fragmentation and decreased network cohesion.

Visual looming and receding networks in awake marmosets investigated with fMRI

The paper uses fMRI in awake marmosets to identify brain networks activated by looming and receding visual stimuli, finding distinct patterns associated with looming that may support protective behaviors.