Paul L. Gribble

Reaching movements in virtual reality depend on the seen avatar arm and not just the acting arm

This study shows that reaching movements in VR are influenced by the visual identity of the arm, not just the controlling arm, with better performance when seeing a right arm.

Sensory expectations and prediction error during feedback control in the human brain

The paper investigates how probabilistic predictions influence feedback responses in the human brain using fMRI, showing expected sensory signals and prediction error signals in motor and somatosensory cortices.

A Context-Free Model of Savings in Motor Learning

The paper shows that recurrent neural networks (RNNs) exhibit motor learning savings without explicit contextual cues, suggesting a neural basis for memory retention through high-dimensional activity shifts.

Sensory expectations shape neural population dynamics in motor circuits

This study shows that sensory expectations influence motor preparation and corrective responses in humans and monkeys, with neural activity scaling with perturbation probabilities.

Durability of Motor Learning by Observing

This study compares the durability of motor learning through observation versus physical practice, finding that observation-induced adaptation decays faster than physical practice.

MotorNet: a Python toolbox for controlling differentiable biomechanical effectors with artificial neural networks

MotorNet is a Python toolbox that enables training artificial neural networks on differentiable biomechanical effectors for motor control tasks.

Sensorimotor feedback loops are selectively sensitive to reward

This study investigates how reward affects seven sensorimotor feedback loops in humans, finding that faster loops are insensitive to reward while slower loops show latency reductions.

The role of feedback in the production of skilled finger sequences

This study investigates how sensory feedback influences the control of skilled finger movement sequences, finding that haptic feedback drives rapid adjustments during execution.

Sensitivity to Error During Visuomotor Adaptation is Similarly Modulated by Abrupt, Gradual and Random Perturbation Schedules

The paper investigates how different perturbation schedules during initial training affect error sensitivity in visuomotor adaptation, finding that all schedules similarly modulate sensitivity.

Spinal stretch reflexes support efficient control of reaching

The paper shows spinal circuits can efficiently control hand movement during reaching, challenging the idea that supraspinal regions are solely responsible for such control.

Null effects of levodopa on reward- and error-based motor adaptation, savings, and anterograde interference

This study tests if levodopa affects reward- and error-based motor adaptation, finding no significant effects on adaptation or neural responses to reward feedback.

Differential dopamine receptor-dependent sensitivity improves action selection in the basal ganglia

This study uses a computational model of the basal ganglia to show that greater D1 receptor sensitivity compared to D2 improves action selection.

EEG correlates of physical effort and reward processing during reinforcement learning

The paper investigates how physical effort modulates neural reinforcement learning signals during decision-making tasks involving reward and effort trade-offs.

Time course of changes in the long latency feedback response parallels the fast process of short term motor adaptation

The paper examines how the long-latency feedback response changes during motor adaptation and finds it correlates with the fast process of adaptation.

Motor learning and transfer: from feedback to feedforward control

This study demonstrates bidirectional transfer between feedforward and feedback motor control during learning, showing that feedback learning influences feedforward control.

Explicit feedback and instruction do not change shoulder muscle activity reduction after shoulder fixation

This study shows that explicit feedback and instructions do not significantly enhance learning of shoulder muscle activity reduction after shoulder fixation.

Generalizing movement patterns following shoulder fixation

This paper investigates whether learning to reduce shoulder muscle activity after shoulder fixation generalizes to new movement conditions and finds partial generalization across some parameters but not others.

The effects of habits on motor skill learning

The paper investigates how initial motor chunking instructions influence the formation of beneficial or detrimental motor habits over a 3-week training period.

Neural Signatures of Reward and Sensory Prediction Error in Motor Learning

The paper identifies neural correlates of reward and sensory error processing during motor learning using EEG, finding the FRN is specific to reward feedback while P300 is modulated by prediction error in both tasks.

Spinal stretch reflexes exploit musculoskeletal redundancy to support postural hand control

The paper shows that spinal stretch reflexes adjust based on hand displacement relative to a target, not muscle stretch, demonstrating efficient motor control through musculoskeletal redundancy.

A rapid visuomotor response on the human upper limb is selectively influenced by implicit, but not explicit, motor learning

This study shows that implicit motor learning, but not explicit strategies, influences the earliest neuromuscular activity during a rapid visuomotor response.

Feedforward and feedback control share an internal model of the arm’s dynamics

The paper shows that feedforward and feedback control share an internal model of arm dynamics by demonstrating learning transfer between control mechanisms when intersegmental dynamics are altered.

Somatosensory Perceptual Training Enhances Motor Learning by Observing

This study shows that improving somatosensory function before observing motor learning enhances subsequent motor performance gains from observation.

Changes in corticospinal excitability associated with motor learning by observing

This study shows that observing motor learning in a force field increases corticospinal excitability, as measured by MEP amplitudes, compared to observing unlearnable movements.

Done in 100 ms: Path-dependent visuomotor transformation in the human upper limb

The paper shows that task complexity affects the magnitude, not latency, of a circuit transforming visual input into motor actions, with a fixed 100 ms latency.

Rapid feedback responses are flexibly coordinated across arm muscles to support goal-directed reaching

The paper shows that rapid feedback responses in arm muscles adapt to visuomotor transformations, supporting goal-directed reaching through flexible coordination.

Compensating for intersegmental dynamics across the shoulder, elbow and wrist joints during feedforward and feedback control

The paper shows the nervous system predicts and compensates for intersegmental dynamics across shoulder, elbow, and wrist joints during reaching and reflexive movements.

Functional Connectivity Between Somatosensory and Motor Brain Areas Predicts Individual Differences in Motor Learning by Observing

The paper shows that pre-observation resting-state functional connectivity between sensory and motor brain areas predicts individual differences in motor learning from observation.