Kevin Johnston

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

This study investigates how marmoset prefrontal cortex handles distractors during working memory tasks, finding robust performance and specific neural modulations related to distractor interference.

The paper records single neuron activity in marmoset area 32 during vocal communication and finds neurons respond to both presented and produced calls in naturalistic interactions.

This study combines electrophysiology and fMRI to show ACC neurons predominantly connect to medial FEF, with stronger functional connectivity during specific saccade tasks.

The paper investigates functional specialization and distributed processing in marmoset lateral prefrontal cortex by recording neural responses to various stimuli across subregions.

The paper investigates neuronal responses in marmoset medial prefrontal cortex area 32 to complex sounds, finding that over half of neurons respond to conspecific vocalizations and show dynamic activity patterns.

This study investigates laminar dynamics of target selection in marmoset PPC during a visual task, revealing similar neural correlates to macaques and humans with distinct layer-specific activity patterns.

The paper identifies a consistent spectrolaminar pattern of LFP power across primate cortex, showing distinct frequency gradients in superficial and deep layers.

This study shows that ketamine disrupts frontoparietal connectivity during working memory in macaques, supporting its use as a model for schizophrenia dysconnection.

This study investigates delay-period activity in marmoset prefrontal cortex during a working memory task, finding persistent activity similar to macaques.

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.

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.

This study examines how ketamine affects gaze patterns during face viewing in marmosets, finding disrupted scan paths but limited motor control effects.

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.

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

This study records single unit activity in marmoset posterior parietal cortex during a gap saccade task, finding gap-related neuronal responses correlated with shorter saccadic reaction times.

This study identifies the frontal eye field in marmosets using microstimulation, showing homology with macaques and supporting marmosets as a model for FEF research.

This study uses electrical microstimulation in awake common marmosets to show that area LIP in the posterior parietal cortex regulates eye movements, supporting its homology with macaque LIP and establishing marmosets as a model for oculomotor research.

The paper investigates how visual stimuli with different spatial frequencies affect rapid visuomotor responses, finding that low spatial frequencies evoke the fastest and most prevalent responses.

This study shows that deactivating the dACC in macaques impairs rule-maintenance performance and alters dlPFC oscillatory activities during a rule-switching task.

The paper describes methods for restraining and training common marmosets to perform oculomotor tasks, demonstrating their suitability for neurophysiological studies.