Andrew J. Watrous

Perspectives in conducting task-based research in pediatric surgical epilepsy patients

The paper examines factors influencing task-based research participation in pediatric epilepsy patients undergoing sEEG, finding that comorbidities do not typically prevent participation.

Electrophysiological features of signals recorded from white matter

The paper analyzes electrophysiological signals from white matter and finds they have distinct spectral features and higher complexity compared to gray matter.

Distinct tasks engage a shared neural subspace in human hippocampus and anterior cingulate cortex

The paper investigates how neural circuits in the human hippocampus and anterior cingulate cortex support multiple tasks, finding shared neural subspaces across distinct behaviors.

Human auditory cortex preferentially tracks speech over music without explicit attention

The paper shows that human auditory cortex preferentially tracks speech over music in children and adolescents without explicit attention, with speech-bias strengthening in the superior temporal gyrus with age.

The neural basis of emotional generalization in empathy

This study investigates how the brain generalizes emotions across individuals, finding that the insula encodes emotions and persons separately, enabling cross-person generalization.

Hippocampus serves as a repository for spoken and heard word meanings during conversations

The paper shows hippocampal neurons encode meanings of spoken and heard words using shared geometric embeddings, enabling abstract cross-personal representations while preserving speaker identity binding.

Human neuronal firing is modulated by the frequency of local field potential oscillations

The paper investigates frequency tuning in human neurons using intracranial recordings and finds 27% of neurons show firing preferences within specific oscillatory frequencies, particularly low-theta.

Linguistic contextualization in the human hippocampus

The paper shows that hippocampal neurons encode word position and context in a way similar to self-attention in large language models.

Parietal cortex is recruited by frontal and cingulate areas to support action monitoring and updating during stopping

The paper shows that the intraparietal sulcus (IPS) is functionally connected to frontal and cingulate regions during action stopping, with different connectivity patterns during successful stopping and control failures.

Plasticity and Language in the Anesthetized Human Hippocampus

This study shows that the human hippocampus can process oddball tones and language stimuli, including semantic and grammatical features, even under general anesthesia.

Complementary roles for hippocampus, anterior cingulate cortex, and orbitofrontal cortex in composing continuous choice

The paper examines brain activity during a continuous prey-pursuit task, identifying distinct roles for hippocampus, ACC, and OFC in decision-making processes.

Independent Continuous Tracking of Multiple Agents in the Human Hippocampus

The paper investigates how hippocampal neurons track multiple agents during pursuit tasks, finding multiplexed neural maps and semi-orthogonal subspaces for distinguishing agents.

Processing of auditory feedback in perisylvian and insular cortex

The paper investigates how auditory responses are modulated during speech production by analyzing intracranial EEG data from patients with epilepsy.

Insula uses overlapping codes for emotion in self and others

The paper shows that the insula uses overlapping neural patterns for recognizing self and others' emotions, while other regions use different patterns.

Brain mechanisms underlying the emotion processing bias in treatment-resistant depression

This paper investigates neural mechanisms of emotion processing bias in treatment-resistant depression using sEEG data from patients and controls, finding altered amygdala and prefrontal cortex activity patterns and their modulation by deep brain stimulation.

A biophysically constrained brain connectivity model based on stimulation-evoked potentials.

The paper develops a biophysically constrained model to estimate 3D conductivity paths from SPES data, showing it correlates with PEP features and outperforms anatomical-based methods.

The Oscillatory ReConstruction Algorithm (ORCA) adaptively identifies frequency bands to improve spectral decomposition in human and rodent neural recordings

ORCA improves spectral decomposition in neural recordings by adaptively identifying frequency bands, showing better performance than conventional methods in human and rodent data.

The effects of direct brain stimulation in humans depend on frequency, amplitude, and white-matter proximity.

This study examines how direct brain stimulation affects neuronal activity in humans, finding that frequency, amplitude, and electrode location influence whether stimulation inhibits or excites activity.

Functionally distinct high and low theta oscillations in the human hippocampus

The paper investigates human hippocampal theta oscillations, finding distinct high (8-Hz) and low (3-Hz) frequencies associated with spatial navigation and non-spatial processes respectively.

Phase-tuned neuronal firing encodes human contextual representations for navigational goals

The paper identifies phase-locked neuronal firing in the human medial temporal lobe that encodes navigational goals during a navigation task.

Theta and alpha oscillations are traveling waves in the human neocortex

The paper identifies theta and alpha oscillations as traveling waves in the human neocortex, showing their behavioral relevance and spatial propagation patterns.

Electrical stimulation in hippocampus and entorhinal cortex impairs spatial and temporal memory

This study uses electrical brain stimulation to show that the medial temporal lobe impairs spatial and temporal memory organization in humans.

Electrophysiological signatures of spatial boundaries in the human subiculum

The paper identifies electrophysiological signatures of spatial boundaries in the human subiculum using intracranial recordings during a virtual navigation task.