Christopher K. Kovach

Hippocampal-cingulate dynamics in the human brain link reinforcement-learning and memory

This study links reinforcement learning computations to memory by showing hippocampal-cingulate dynamics in humans during a gambling task.

Genuinely Blind Identification of Sleep Spindles through Trispectral Modulation Analysis

This paper introduces a blind method to identify sleep spindles using trispectral modulation analysis, achieving high agreement with expert annotations and detecting more spindles than conventional methods.

Exercise enhances hippocampal-cortical ripple interactions in the human brain

This study shows that a single exercise session increases hippocampal ripples and enhances their coupling with cortical networks in humans.

Neural activity flows through cortical subnetworks during speech production

The paper uses electrocorticography to analyze neural activity during speech production, identifying distinct cortical networks and their sequential activation patterns.

Distinct Temporal Patterns of Human Neural Firing in the Subthalamic Nucleus During Speech and Orofacial Movement

The paper examines STN neural activity during speech and orofacial movement tasks, finding that 22% of clusters are speech-specific, 12% movement-specific, and 27% respond to both.

Brain-wide single-neuron bases of working memory for sounds in humans

The paper uses human intracranial recordings to study neural activity during an auditory working memory task, finding attractor-like states in brain regions associated with memory maintenance and adjustment.

Sensing, Feeling, and Regulating: Investigating the Association of Focal Brain Damage with Voluntary Respiratory and Motor Control

This study examines how focal brain damage affects voluntary respiratory and motor control, finding impaired regulation and increased anxiety in specific brain regions.

The gene expression signature of electrical stimulation in the human brain

This study identifies the gene expression changes in the human brain following electrical stimulation, revealing non-neuronal cell involvement and a conserved gene signature.

A frontal cortical network is critical for language planning during spoken interaction

This study shows that stimulating specific frontal cortical regions during spoken interaction leads to language planning deficits and response errors.

Distribution of multi-unit pitch responses recorded intracranially from human auditory cortex

This study records multi-unit pitch responses from human auditory cortex and finds they are distributed across Heschl's gyrus, not localized to a specific region.

Temporally organized representations of reward and risk in the human brain

This study uses iEEG to show how reward and risk computations are temporally organized in the human brain, revealing cascading and parallel encoding patterns.

Consciousness is indexed by analogous cortical reorganization during sleep and anesthesia

The paper identifies common neural signatures of consciousness loss and recovery during sleep and anesthesia using intracranial EEG and diffusion map embedding.

Immediate neural network impact after the loss of a semantic hub

This study examines the neural impact of disconnecting a semantic hub in the human brain and finds specific network changes and partial compensation.

Functional geometry of auditory cortical resting state networks derived from intracranial electrophysiology

The paper maps auditory cortical networks using resting state intracranial electrophysiology, revealing hierarchical organization across spatial scales and frequency-dependent hub identities.

Common Fronto-temporal Effective Connectivity in Humans and Monkeys

The paper identifies common effective connectivity patterns between auditory cortex and fronto-temporal regions in humans and monkeys using functional imaging and electrical stimulation.

Focal cortical surface cooling is a novel and safe method for intraoperative functional brain mapping

This paper evaluates the safety of focal cortical cooling as an alternative to electrical cortical stimulation for intraoperative functional brain mapping, finding no intraoperative seizures and comparable post-operative outcomes.

Differential causal involvement of human auditory and frontal cortices in vocal motor control

This study investigates the role of frontal and auditory cortices in vocal motor control using direct electrical stimulation in patients, showing distinct contributions of these regions to vocal initiation and feedback-dependent control.

Cortical functional connectivity indexes arousal state during sleep and anesthesia

The paper examines cortical functional connectivity during sleep and anesthesia to identify changes in arousal states and suggests common mechanisms of loss of consciousness.

A sound-sensitive source of alpha oscillations in human non-primary auditory cortex

The paper investigates alpha oscillations in human non-primary auditory cortex using electrode recordings from epilepsy patients, finding that alpha activity is suppressed during speech processing in a specific region.

Intracranial Markers of Conscious Face Perception in Humans

This study identifies brain activity patterns in the fusiform gyrus and superior temporal sulcus that distinguish seen from unseen faces and upright from inverted faces using ECoG data.

Contents of Consciousness Investigated as Integrated Information in Direct Human Brain Recordings

The paper tests if integrated information theory applies to conscious experience by analyzing brain recordings and finding that integrated information structures classify visual experiences more accurately than other measures.