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The Power of Remembering Emotions – Investigating Patterns of neural Oscillations in the Time-Frequency Domain during Encoding and Retrieval of emotional Memory

Petersdotter, Linn LU (2021) PSYP01 20211
Department of Psychology
Abstract (Swedish)
Neural oscillatory activity represented in the time-frequency (TF) domain is believed to reflect cognitive mechanisms underlying episodic memory encoding and retrieval. Research has shown that encoding and retrieval processes are likely modulated by emotional valence. This study investigates how successful associative memory encoding and retrieval of content varying in valence (positive, negative, neutral) is represented in neural activity patterns in the TF domain. Electroencephalogram (EEG) data was recorded from 23 healthy participants undergoing a memory paradigm reflecting a sequential associative encoding and cued recall logic. Spectral analyses in the TF domain were applied contrasting brain patterns of successful with unsuccessful... (More)
Neural oscillatory activity represented in the time-frequency (TF) domain is believed to reflect cognitive mechanisms underlying episodic memory encoding and retrieval. Research has shown that encoding and retrieval processes are likely modulated by emotional valence. This study investigates how successful associative memory encoding and retrieval of content varying in valence (positive, negative, neutral) is represented in neural activity patterns in the TF domain. Electroencephalogram (EEG) data was recorded from 23 healthy participants undergoing a memory paradigm reflecting a sequential associative encoding and cued recall logic. Spectral analyses in the TF domain were applied contrasting brain patterns of successful with unsuccessful memory formation and retrieval. We discovered subsequent memory effects (SMEs, i.e., brain data correlated to later remembered contrasted with later forgotten content) reflected in synchronization (frequency power increases) patterns varying in strength, timing, and topography over the theta, alpha, beta, and gamma band across valence conditions. These findings complement current theories in the field while pointing to mechanisms likely connected to working memory (WM) and inhibitory cognitive processes. Analysing SMEs between valence conditions indicated a difference in contrasted oscillatory patterns in theta and gamma frequencies, differentiating between neutral and emotional (positive and negative) valence. The resulting neural patterns show the complexity of different cognitive processes involved in episodic memory and offer a novel angle on how successful memory encoding and retrieval is represented in the TF domain across emotionally varying stimuli. (Less)
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author
Petersdotter, Linn LU
supervisor
organization
course
PSYP01 20211
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Cognitive Neuroscience, EEG Study, Episodic Memory Paradigm, Emotional Memory, Subsequent Memory Effects, Time-Frequency Analysis
language
English
id
9066017
date added to LUP
2021-11-16 13:17:24
date last changed
2021-11-16 13:17:24
@misc{9066017,
  abstract     = {{Neural oscillatory activity represented in the time-frequency (TF) domain is believed to reflect cognitive mechanisms underlying episodic memory encoding and retrieval. Research has shown that encoding and retrieval processes are likely modulated by emotional valence. This study investigates how successful associative memory encoding and retrieval of content varying in valence (positive, negative, neutral) is represented in neural activity patterns in the TF domain. Electroencephalogram (EEG) data was recorded from 23 healthy participants undergoing a memory paradigm reflecting a sequential associative encoding and cued recall logic. Spectral analyses in the TF domain were applied contrasting brain patterns of successful with unsuccessful memory formation and retrieval. We discovered subsequent memory effects (SMEs, i.e., brain data correlated to later remembered contrasted with later forgotten content) reflected in synchronization (frequency power increases) patterns varying in strength, timing, and topography over the theta, alpha, beta, and gamma band across valence conditions. These findings complement current theories in the field while pointing to mechanisms likely connected to working memory (WM) and inhibitory cognitive processes. Analysing SMEs between valence conditions indicated a difference in contrasted oscillatory patterns in theta and gamma frequencies, differentiating between neutral and emotional (positive and negative) valence. The resulting neural patterns show the complexity of different cognitive processes involved in episodic memory and offer a novel angle on how successful memory encoding and retrieval is represented in the TF domain across emotionally varying stimuli.}},
  author       = {{Petersdotter, Linn}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{The Power of Remembering Emotions – Investigating Patterns of neural Oscillations in the Time-Frequency Domain during Encoding and Retrieval of emotional Memory}},
  year         = {{2021}},
}