Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: May 19, 2026

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
07:33

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

Expected reward modulates encoding-related theta activity before an event.

Matthias J Gruber1, Andrew J Watrous, Arne D Ekstrom

  • 1Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK. mjgruber@ucdavis.edu

Neuroimage
|August 25, 2012
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Distinct motivational factors shape news-seeking in young adults.

Scientific reports·2026
Same author

Human neuronal firing varies with the frequency of local field potential oscillations.

PLoS biology·2026
Same author

Modeling the journey as well as the destination: a control theory account of rotational navigation.

bioRxiv : the preprint server for biology·2026
Same author

Author Correction: Plasticity and language in the anaesthetized human hippocampus.

Nature·2026
Same author

Natural language processing captures memory content associated with shared neural patterns at encoding and retrieval.

Communications psychology·2026
Same author

Retrieval-related Eye Movements Are Predictive of Memory Precision.

Journal of cognitive neuroscience·2026

This study explores how expecting a reward influences the brain's ability to store new information. Researchers found that specific brain waves, known as theta activity, increase before learning when a high reward is anticipated. This suggests that motivation plays a key role in how effectively we form memories.

Area of Science:

  • Cognitive neuroscience investigating reward-modulated encoding-related theta activity
  • Electrophysiology within behavioral psychology

Background:

No prior work had resolved how reward anticipation influences memory formation through oscillatory brain dynamics. It was already known that theta rhythms before an event onset affect subsequent memory performance. That uncertainty drove researchers to examine the interplay between reward expectancy and neural oscillations. Prior research has shown that frontal brain regions exhibit rhythmic activity linked to cognitive control. This gap motivated an investigation into whether monetary incentives alter these pre-event neural patterns. Previous studies established that reward signals influence various aspects of human cognition. However, the specific relationship between anticipatory brain states and successful information storage remained poorly defined. This study addresses these questions by monitoring brain activity during a word-learning task.

Purpose Of The Study:

The researchers aimed to assess the relationship between reward expectancy, anticipatory brain oscillations, and successful memory formation. This study sought to clarify how motivation influences the brain before an event occurs. The authors investigated whether monetary incentives modulate neural activity in the theta frequency range. They addressed the uncertainty regarding how reward cues affect the encoding of subsequent information. This work focused on the interaction between pre-stimulus brain states and later recognition performance. The team examined whether high and low reward conditions produce different neural signatures. They intended to determine if motivationally significant stimuli require distinct patterns of oscillatory activity. This investigation provides insights into the neurophysiological mechanisms that support memory acquisition in humans.

Keywords:
electroencephalographymemory formationfrontal brain regionsdopaminergic signalingcognitive neuroscience

Frequently Asked Questions

The researchers propose that high reward expectancy enhances frontal theta power, which subsequently predicts better memory performance. In contrast, low reward cues do not show this predictive relationship, suggesting that motivation is necessary for this specific neural modulation to occur.

The authors utilized scalp electroencephalography (EEG) to monitor brain oscillations in healthy adults. This tool allowed for the precise measurement of rhythmic activity in the 4-8 Hz range during the interval between reward cues and word presentation.

Frontal theta activity is necessary for successful encoding specifically when stimuli are motivationally significant. The researchers observed that this predictive relationship is absent in low reward conditions, highlighting the importance of high-stakes contexts for this mechanism.

More Related Videos

Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG
09:35

Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG

Published on: March 10, 2017

Related Experiment Videos

Last Updated: May 19, 2026

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
07:33

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG
09:35

Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG

Published on: March 10, 2017

Main Methods:

The researchers conducted an electroencephalography study involving healthy adult participants. Each subject memorized a series of words during the experimental session. A visual cue preceded every word to indicate potential monetary gain. These cues categorized trials into either high or low reward conditions. The team recorded scalp brain signals throughout the entire task duration. They analyzed the frequency range between four and eight hertz before word presentation. This approach allowed for the isolation of anticipatory neural patterns. Statistical tests evaluated the correlation between these signals and later recognition performance.

Main Results:

Frontal theta power before word onset predicted later memory success specifically during high reward trials. No significant differences in rhythmic activity appeared before word presentation in the low reward condition. The magnitude of pre-stimulus oscillations correlated with the number of high-reward words recognized with confidence. These findings suggest that reward expectancy modulates the neural processes required for successful information storage. The data indicate that motivationally significant stimuli trigger distinct pre-event brain states. This study establishes a clear connection between incentive levels and anticipatory neural dynamics. The results highlight that theta oscillations are sensitive to the motivational context of incoming information. The researchers observed these effects consistently across the participant cohort during the recognition test.

Conclusions:

The authors propose that reward expectancy serves as a modulator for memory-related neural oscillations. These findings provide evidence for a functional link between motivational states and pre-event brain activity. Theta oscillations before stimulus presentation appear particularly significant for processing motivationally relevant information. The researchers suggest that dopaminergic signaling during anticipation might drive these observed frontal rhythmic patterns. This study demonstrates that high reward conditions specifically enhance the predictive power of pre-stimulus neural activity. The data indicate that memory success is tied to the magnitude of these anticipatory brain signals. These results imply that motivational context shapes the neural mechanisms underlying successful information acquisition. The authors conclude that reward-related modulation of brain rhythms is a key factor in memory encoding.

The researchers employed monetary reward cues to manipulate participant motivation. These cues served as the primary data type for assessing how different levels of expected gain influence the subsequent neural encoding of word lists.

The study measured the magnitude of pre-stimulus theta power. This measurement was correlated with the number of high-reward words that participants later recognized with high confidence, demonstrating a direct link between anticipatory brain states and memory success.

The authors propose that dopaminergic activity during the anticipation phase may mediate the observed frontal theta patterns. This hypothesis links the behavioral motivation to the underlying neurophysiological changes observed during the task.