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Visual Modulation Of Resting State Α Oscillations, Kelly Webster, Tony Ro
Visual Modulation Of Resting State Α Oscillations, Kelly Webster, Tony Ro
Publications and Research
Once thought to simply reflect passive cortical idling, recent studies have demonstrated that α oscillations play a causal role in cognition and perception. However, whether and how cognitive or sensory processes modulate various components of the α rhythm is poorly understood. Sensory input and resting states were manipulated in human subjects while electroencephalography (EEG) activity was recorded in three conditions: eyes-open fixating on a visual stimulus, eyes-open without visual input (darkness), and eyes-closed without visual input (darkness). We show that α power and peak frequency increase when visual input is reduced compared to the eyes open, fixating condition. These results …
Changes In Cortical Processing Following Unilateral Visual Cortex Deafferentation, Matthew Gannon
Changes In Cortical Processing Following Unilateral Visual Cortex Deafferentation, Matthew Gannon
Graduate Theses and Dissertations
After the loss of inputs, cells in visual cortex adapt and begin representing space beyond their classical receptive fields. This ability for functional reorganization is a phenomenon known as neuroplasticity. Homonymous hemianopia is a unique case of this scenario that results from hemispheric deafferentation, or when all visual inputs in to one hemisphere of the brain are lost. This condition occurs due to unilateral damage of the post-chiasmatic geniculo-striate pathway, the network that carries visual information from one side of visual space to the visual cortex for processing. Damage to this pathway causes perceptual blindness in the side of space …
The Role Of Gamma Oscillations And Cortical Inhibition In The Development Of Working Memory In Adolescence, Christopher P. Walker
The Role Of Gamma Oscillations And Cortical Inhibition In The Development Of Working Memory In Adolescence, Christopher P. Walker
Dissertations & Theses (Open Access)
Adolescence is a dynamic period of social, cognitive, and biological changes. In particular, working memory, the ability to actively encode and maintain information over a short period of time, develops early in childhood and gradually increases in capacity and stability during adolescence. The precise neurophysiological mechanism by which working memory capacity increases during adolescence is unclear. The objective of this investigation was to evaluate the role of cortical gamma-band (> 30 Hz) oscillations—which are associated with working memory in adults—for the development of working memory capacity in adolescents, and to identify the extent to which the temporal profile of gamma-aminobutyric …
The Influence Of Neural Reward Processing On Memory In Depression, Nathan M. Hager
The Influence Of Neural Reward Processing On Memory In Depression, Nathan M. Hager
Psychology Theses & Dissertations
Theories and research suggest that depression involves impaired reward sensitivity and a deficit in memory for rewarding stimuli. Some researchers propose that this memory deficit may result from reduced neural reward sensitivity, which impairs the encoding of reward-related memories, but few studies have directly probed this connection. Such research may benefit from examining the reward positivity (RewP), an event-related potential (ERP) previously linked to reduced reward sensitivity in depression. Undergraduates with high or low self-reported depression completed a task in which they chose one of three doors, revealing a neutral word written in a color which indicated an outcome of …
Neural Correlates Of Automatic Emotional Processing And Emotion Regulation In Empathy And Psychopathy-Related Coldheartedness, Danielle Difilipo
Neural Correlates Of Automatic Emotional Processing And Emotion Regulation In Empathy And Psychopathy-Related Coldheartedness, Danielle Difilipo
Dissertations, Theses, and Capstone Projects
Psychopathy is a personality disorder that is defined, in part, by a lack of empathy. Psychopathy-related empathic deficits have been associated with atypical behavioral and neural responses to emotional facial expressions. Although the mirror neuron system (MNS) has been implicated in empathy, very few studies have examined the role of MNS functioning as it pertains to empathy impairments in psychopathy. Moreover, there is very little empirical research regarding emotion regulation in psychopathy, and specifically whether emotional responses can be intentionally upregulated. The present study sought to clarify whether the MNS is functionally intact in adults with subclinical psychopathic traits, particularly …
Visual Entrainment Of Perception-Related Neural Oscillations As A Mechanism For Maintaining Rhythmic Temporal Expectations Across A Wide Range Of Frequencies, Michael James Gray
Visual Entrainment Of Perception-Related Neural Oscillations As A Mechanism For Maintaining Rhythmic Temporal Expectations Across A Wide Range Of Frequencies, Michael James Gray
Dissertations, Theses, and Capstone Projects
Visual sensitivity fluctuates rhythmically, in-synch with ongoing, EEG-recorded neural oscillations across a wide range of frequencies (~1-25hz). Some recent work has suggested that these perception-related neural oscillations can be entrained by rhythmic visual stimulation. Evidence is also emerging that the entrainment of ongoing oscillations in visual and auditory cortices is involved in rhythmic temporal expectations. In the introduction chapter, I attempt to bridge these bodies of literature and hypothesize that rhythmic visual stimuli automatically entrain ongoing, perception-related neural oscillations and that this mechanism supports the maintenance of rhythmic temporal expectations. Chapters 2 and 3 address this hypothesis from different angles. …
Using Meditation To Improve Measures Of Attention In Older Adults, Sabrina Ford
Using Meditation To Improve Measures Of Attention In Older Adults, Sabrina Ford
Electronic Thesis and Dissertation Repository
Age-related cognitive decline greatly impacts quality of life for older adults. Previous research has indicated that meditation may act as a neuroprotective factor to prevent age-related cognitive decline. This thesis sought to replicate previous findings and investigate if a four-week meditation intervention would improve sustained attention. Participants 60 years and older (n=27, 17 female) were recruited and assigned to a focused-attention (FA) meditation or relaxation group which met for four weeks, three times a week. Resting-state EEG was used to collect individual alpha peak frequency (iAPF) and frontal alpha asymmetry (FAA). The Sustained Attention to Response Task (SART) was also …
Neural Entrainment Indexes Statistical Learning In Children, Christine Moreau
Neural Entrainment Indexes Statistical Learning In Children, Christine Moreau
Electronic Thesis and Dissertation Repository
Statistical learning is proposed as a mechanism for discovering structural patterns in speech through incidental exposure. However, studies have largely relied on assessing explicit memory after learning has occurred, which does not capture the time course and process of statistical learning per se. To better understand the dynamics of statistical learning, we assessed 8- to 12-year-old children using an EEG measure of learning, which captures changes in neural entrainment to words embedded in a continuous artificial language. Statistical learning was assessed post-learning using implicit and explicit behavioural tests. The neural entrainment results demonstrated rapid learning of word-level information, while post-learning …
Cortical Beta Oscillations Are Associated With Motor Performance Following Visuomotor Learning, Svenja Espenhahn, Bernadette C.M. Van Wijk, Holly E. Rossiter, Archy O. De Berker, Nell D. Redman, Jane Rondina, Joern Diedrichsen, Nick S. Ward
Cortical Beta Oscillations Are Associated With Motor Performance Following Visuomotor Learning, Svenja Espenhahn, Bernadette C.M. Van Wijk, Holly E. Rossiter, Archy O. De Berker, Nell D. Redman, Jane Rondina, Joern Diedrichsen, Nick S. Ward
Brain and Mind Institute Researchers' Publications
© 2019 The Authors People vary in their capacity to learn and retain new motor skills. Although the relationship between neuronal oscillations in the beta frequency range (15–30 Hz) and motor behaviour is well established, the electrophysiological mechanisms underlying individual differences in motor learning are incompletely understood. Here, we investigated the degree to which measures of resting and movement-related beta power from sensorimotor cortex account for inter-individual differences in motor learning behaviour in the young and elderly. Twenty young (18–30 years) and twenty elderly (62–77 years) healthy adults were trained on a novel wrist flexion/extension tracking task and subsequently retested …
Understanding The Neural Bases Of Implicit And Statistical Learning, Laura J. Batterink, Ken A. Paller, Paul J. Reber
Understanding The Neural Bases Of Implicit And Statistical Learning, Laura J. Batterink, Ken A. Paller, Paul J. Reber
Brain and Mind Institute Researchers' Publications
© 2019 Cognitive Science Society, Inc. Both implicit learning and statistical learning focus on the ability of learners to pick up on patterns in the environment. It has been suggested that these two lines of research may be combined into a single construct of “implicit statistical learning.” However, by comparing the neural processes that give rise to implicit versus statistical learning, we may determine the extent to which these two learning paradigms do indeed describe the same core mechanisms. In this review, we describe current knowledge about neural mechanisms underlying both implicit learning and statistical learning, highlighting converging findings between …
Behavioral And Psychophysiological Effects Of Near-Miss Outcomes In A Game Of War, Erin Wylie
Behavioral And Psychophysiological Effects Of Near-Miss Outcomes In A Game Of War, Erin Wylie
All NMU Master's Theses
Within the gambling literature, the misidentification of outcomes has been shown to affect gambling behaviors in players. A notably salient stimulus frequently cited as leading to the misidentification of wins is near-misses. Near-misses occur when the outcome of an event closely resembles a winning outcome, even though it is a loss. The current study intended to further investigate the effects of near-misses relative to wins and losses on player’s inter-trial latencies and the presence of the feedback-related negativity (FRN) and P300 event related potentials (ERPs) in a game of war card game. FRN is a negative fronto-central ERP component occurring …
Competitive Frontoparietal Interactions Mediate Implicit Inferences, Martijn E. Wokke, Tony Ro
Competitive Frontoparietal Interactions Mediate Implicit Inferences, Martijn E. Wokke, Tony Ro
Publications and Research
Frequent experience with regularities in our environment allows us to use predictive information to guide our decision process. However, contingencies in our environment are not always explicitly present and sometimes need to be inferred. Heretofore, it remained unknown how predictive information guides decision-making when explicit knowledge is absent and how the brain shapes such implicit inferences. In the present experiment, 17 human participants (9 females) performed a discrimination task in which a target stimulus was preceded by a predictive cue. Critically, participants had no explicit knowledge that some of the cues signaled an upcoming target, allowing us to investigate how …
Evaluation Of An Eeg Task For Detecting Latent Infections, Ryan Weels, Savanah Bishun, Bruce Brown
Evaluation Of An Eeg Task For Detecting Latent Infections, Ryan Weels, Savanah Bishun, Bruce Brown
Journal of Undergraduate Research
Ultimately our goal is to develop methods for diagnosing neuropsychiatric illnesses through measurement and analysis of the electrophysiological stream of consciousness. In this project we test how well EEG adaptations of the Sternberg (1966) memory search task and the n-back cognitive task can discriminate between individuals who are positive for Herpes-simplex-1 and healthy controls.
Behavioral And Neural Correlates Of Misses During Cued Recall, Lindsey Sirianni
Behavioral And Neural Correlates Of Misses During Cued Recall, Lindsey Sirianni
Electronic Theses, Projects, and Dissertations
Recognition memory is thought to rely upon both recollection and familiarity. When people recall an episode from the past it is generally considered to reflect the memory process of recollection. Therefore, if people can successfully recall an item, they should be able to recognize it. However, in cued recall paradigms of memory research, participants sometimes correctly recall a studied target word in the presence of a strong semantic cue but then fail to recognize that word as actually having been studied. This paradox and underlying cognitive processes have been minimally studied by scientists, leaving this phenomenon poorly understood. Extant research …
Neurological Correlates Of The Dunning-Kruger Effect, Alana Lauren Muller
Neurological Correlates Of The Dunning-Kruger Effect, Alana Lauren Muller
Electronic Theses, Projects, and Dissertations
The Dunning-Kruger Effect is a metacognitive phenomenon in which individuals who perform poorly on a task believe they performed well, whereas individuals who performed very well believe their performance was only average. To date, this effect has only been investigated in the context of performance on mathematical, logical, or lexical tasks, but has yet to be explored for its generalizability in episodic memory task performance. We used a novel method to elicit the Dunning-Kruger Effect via a memory test of item and source recognition confidence. Participants studied 4 lists of words and were asked to make a simple decision about …
Electrical Brain Activity And The Examinee's Level Of Effort During Performance Validity Tasks, Roselia Juan
Electrical Brain Activity And The Examinee's Level Of Effort During Performance Validity Tasks, Roselia Juan
Electronic Theses and Dissertations
Many people who intend to obtain benefits from an assessment may resort to performing poorly on assessments. Previous literature has found that cognitive deficits and long-term symptomatic complaints are reported by individuals with mild Traumatic Brain Injuries. Limited studies have investigated how brain activity measured via Quantitative Electroencephalography (QEEG) relates to mental effort during cognitive tasks. The purpose of this study was to investigate electrical brain activity, as measured by Peak (PK) frequency, on frontal brain areas (i.e. locations F3-F4) in individuals giving poor mental effort. Measures of effort, in this study, include the Test of Memory Malingering, Rey 15-Item …
An Erp Investigation Of Reward Signals For Differing Classes Of Reinforcing Stimuli, Darin R. Brown
An Erp Investigation Of Reward Signals For Differing Classes Of Reinforcing Stimuli, Darin R. Brown
Psychology ETDs
In order to successfully traverse an actively complex environment, an agent is required to learn from the consequences of their actions. For over a century, models of behavior have been developed demonstrating these consequence-based learning systems. More recently, underlying biological systems have been found to adhere to these constructs of learning. The electroencephalographic signal known as the Reward Positivity (RewP) is thought to reflect a dopamine-dependent cortical signal specific to reward receipt. Importantly, this signal has been shown to adhere to an axiomatic (rule-like) positive reward prediction error, whereby it is evoked following outcomes that are better than expected. These …
Using Electrophysiology To Investigate Changes In Brain Activation In Individuals With Chronic Stroke, Sarah G. Dalton
Using Electrophysiology To Investigate Changes In Brain Activation In Individuals With Chronic Stroke, Sarah G. Dalton
Linguistics ETDs
Many individuals who have experienced a stroke also experience persistent decrements in several domains, such as sensorimotor, language, and cognition. While rehabilitation for these deficits is helpful even decades after a stroke, there is limited information available to determine the most effective pairing of treatment with individual deficits. Further, despite decades of neuroimaging research, our understanding of optimal recovery patterns following stroke is relatively poor. In order to improve outcomes for individuals living with chronic deficits due to stroke, neurophysiological biomarkers corresponding to recovery patterns and treatment response are needed. Electroencephalography (EEG) holds great potential for identifying biomarkers as it …
Differences In Stimulus-Response Prediction And Reorientation Of Attention Relative To Student Athletic Background, Madelyn Quirk, Jessica Green
Differences In Stimulus-Response Prediction And Reorientation Of Attention Relative To Student Athletic Background, Madelyn Quirk, Jessica Green
Senior Theses
Within the game of baseball, every hit, pitch, and catch, rely on a player’s ability to respond quickly and appropriately to the resulting play in a manner that allows them to be an asset on the field. The most successful athletes are those best able to allocate their attention to accomplish these goal-oriented tasks. To explore this attentional orientation, occipital neural recordings of alpha waves often show a preemptive shift in phase alignment according to temporal anticipations. Here we aimed to identify influences on voluntary attention using cueing paradigms to examine stimulus-response timing relative to validity and athletic background, while …
Asymmetry In Resting Alpha Activity: Effects Of Handedness, Ruth E. Propper, Jenna Pierce, Mark W. Geisler, Stephen D. Christman, Nathan Bellorado
Asymmetry In Resting Alpha Activity: Effects Of Handedness, Ruth E. Propper, Jenna Pierce, Mark W. Geisler, Stephen D. Christman, Nathan Bellorado
Ruth Propper
Frontal electroencephalographic (EEG) alpha band power during rest shows increased right, and/or decreased left, hemisphere activity under conditions of state or trait withdrawal-associated effect. Non-right-handers (NRH) are more likely to have mental illnesses and dispositions that involve such withdrawal-related effect. The aim of the study was to examine whether NRH might be characterized by increased right, relative to left, hemisphere activity during rest. Methods: The present research investigated that hypothesis by examining resting EEG alpha power in consistently-right-handed (CRH) and NRH individuals. Results: In support of the hypothesis, NRH demonstrated decreased right hemisphere alpha power, and therefore increased right hemisphere …
Solution-Focused Therapy Changes Neurophysiological Activation In Collegiate Athletes: An Intervention Study, Kyler T. Shumway
Solution-Focused Therapy Changes Neurophysiological Activation In Collegiate Athletes: An Intervention Study, Kyler T. Shumway
Doctor of Psychology (PsyD)
Neurophysiological research has begun to uncover how therapy produces change in the brain. To examine this phenomenon, many studies have controlled for specific symptoms to identify where therapy has the greatest effect (Linden, 2006). In athletic performance, anxiety represents a significant struggle for college athletes (Mabweazara, Leach, & Andrews, 2017). The present study intended to examine the impact of brief therapy on brain activation and competition anxiety in college athletes. A sample of collegiate athletes (n = 17) participated in a pre-post intervention study. Pre- and post-intervention measures included electroencephalogram (EEG), galvanic skin response (GSR), self-report anxiety measures (SAS-2, GAD-7), …
Men And Masculinity: How The Brain And Heart Respond To Shame, Christopher Spromberg
Men And Masculinity: How The Brain And Heart Respond To Shame, Christopher Spromberg
Doctor of Psychology (PsyD)
This dissertation examined the influence that level of adherence to traditionally masculine gender values, norms, and beliefs has on how men cognitively and physiologically respond to a shame based projective measure. A 2-stage study was used. In the first stage 208 undergraduate men responded to the Conformity to Masculine Norms Inventory (CMNI; Mahalik, Burns, & Syzdek, 2007). Utilizing the total masculinity score from the CMNI, quartiles were constructed. The two extreme quartiles comprised 2 groups; most traditionally conforming (TMASC) and most non-traditionally conforming (NTMASC) to masculinity norms. Men from these groups (TMASC n = 11; NTMASC n = 13) were …
That Note Sounds Wrong! Age-Related Effects In Processing Of Musical Expectation, Andrea R. Halpern, Ioanna Zioga, Martin Shankleman, Job Lindsen, Marcus T. Pearce, Joydeep Bhattacharya
That Note Sounds Wrong! Age-Related Effects In Processing Of Musical Expectation, Andrea R. Halpern, Ioanna Zioga, Martin Shankleman, Job Lindsen, Marcus T. Pearce, Joydeep Bhattacharya
Andrea Halpern
Part of musical understanding and enjoyment stems from the ability to accurately predict what note (or one of a small set of notes) is likely to follow after hearing the first part of a melody. Selective violation of expectations can add to aesthetic response but radical or frequent violations are likely to be disliked or not comprehended. In this study we investigated whether a lifetime of exposure to music among untrained older adults would enhance their reaction to unexpected endings of unfamiliar melodies. Older and younger adults listened to melodies that had expected or unexpected ending notes, according to Western …
A Wizard Hat For The Brain: Predicting Long-Term Memory Retention Using Electroencephalography, Noah Libby
A Wizard Hat For The Brain: Predicting Long-Term Memory Retention Using Electroencephalography, Noah Libby
Senior Projects Spring 2019
Learning is a ubiquitous process that transforms novel information and events into stored memory representations that can later be accessed. As a learner acquires new information, any feature of a memory that is shared with other memories may produce some level of retrieval- competition, making accurate recall more difficult. One of the most effective ways to reduce this competition and create distinct representations for potentially confusable memories is to practice retrieving all of the information through self-testing with feedback. As a person tests themself, competition between easily-confusable memories (e.g. memories that share similar visual or semantic features) decreases and memory …