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Full-Text Articles in Neuroscience and Neurobiology
Neural Correlates Of Familiarity Across Time Scales And Their Involvement In Explicit Memory Decisions, Haopei Yang
Neural Correlates Of Familiarity Across Time Scales And Their Involvement In Explicit Memory Decisions, Haopei Yang
Electronic Thesis and Dissertation Repository
Familiarity is a type of memory signal that can support recognition of prior occurrences without retrieval of associated contextual information. It is typically probed with respect to recent laboratory exposure in recognition-memory studies involving human participants. This line of work has revealed several neural correlates including event-related potentials (ERPs) and blood-oxygenation-level-dependent (BOLD) activity in several regions. However, few studies have examined familiarity accumulated outside of laboratory settings through lifetime experience. Hence, it is currently unclear whether similar neural correlates are involved. The fluency-attribution framework decomposes familiarity judgement into automatic and decision-related processes. Since recent and lifetime familiarity are phenomenologically and …
Feeling-Of-Knowing Experiences Breed Curiosity, Gregory Brooks
Feeling-Of-Knowing Experiences Breed Curiosity, Gregory Brooks
Electronic Thesis and Dissertation Repository
It is well-established that curiosity has benefits for learning. Less is known about potential links between curiosity and memory retrieval. In theoretical work on metacognition it has been argued that retrieval experiences that occur during memory search can exert control over behaviour. States of curiosity, which can be defined as behavioural tendencies to seek out information, may play a critical role in this control function. We conducted two experiments to address this idea, focusing on links between feeling-of knowing (FOK) experiences, memory-search duration, and subsequent information-seeking behaviour. We administered an episodic FOK paradigm that probed memory for previously studied arbitrary …
Mechanisms Involved In The Assessment Of Cumulative Long-Term Familiarity Of Object Concepts: An Erp Study, Haopei Yang
Mechanisms Involved In The Assessment Of Cumulative Long-Term Familiarity Of Object Concepts: An Erp Study, Haopei Yang
Electronic Thesis and Dissertation Repository
We investigated the sensitivity of ERP components implicated in recognition memory to degree of experimentally controlled and lifetime cumulative exposures during explicit memory judgements. A parietally distributed ERP component spanning both the FN400/N400 and the LPC time windows tracked both types of judgements. This effect appears to be an LPC effect with an early onset, and differs from previously reported effects of repetition linked to implicit memory. Based on recent evidence, we interpreted it as response-related evidence accumulation processes that are in line with both single-process models and continuous dual-process models. We also observed more positive ERPs in the left …
The Neural And Cognitive Basis Of Cumulative Lifetime Familiarity Assessment, Devin Duke
The Neural And Cognitive Basis Of Cumulative Lifetime Familiarity Assessment, Devin Duke
Electronic Thesis and Dissertation Repository
Perirhinal cortex (PrC) has been implicated as a brain region in the medial temporal lobes (MTL) that critically contributes to familiarity-based recognition memory, a process that allows for recognition to occur independently of contextual recollection. Informed by neurophysiological research in non-human primates, fMRI, as well as behavioural work in humans, the current thesis research tests the novel hypothesis that PrC cortex functioning also underlies the ability to assess cumulative lifetime familiarity with object concepts that are characterized by a lifetime of experiences. In Chapter 2, a patient (NB) with a left anterior temporal lobe (ATL) lesion that included PrC as …
Category-Specific Item Recognition And The Medial Temporal Lobe, Christopher B. Martin
Category-Specific Item Recognition And The Medial Temporal Lobe, Christopher B. Martin
Electronic Thesis and Dissertation Repository
Much neuropsychological and neuroimaging research has been focused on the contributions of different medial temporal lobe (MTL) structures to recognition memory. The majority of these studies have linked perirhinal cortex (PrC) to item recognition, whereas the hippocampus and parahippocampal cortex (PhC) have primarily been associated with the recollection of contextual detail pertaining to a specific prior stimulus encounter. Here, I report results from three fMRI studies that examined the neural correlates of item recognition with a specific focus on the relationship between such signals and category-specific effects in the MTL. In Chapter 2, I reveal that category-specific representations in both …
When Faces "Feel" Familiar: The Role Of Affective Signals In Face Recognition, Lauren E. Dunphy
When Faces "Feel" Familiar: The Role Of Affective Signals In Face Recognition, Lauren E. Dunphy
Electronic Thesis and Dissertation Repository
Previous research has suggested that there may be an increase in positive affect and autonomic arousal in response to seeing a familiar face. These studies rarely distinguish between faces for which there is only a “feeling” of familiarity, and faces for which this feeling is accompanied by the retrieval of semantic knowledge about the individual. In the current study we aimed to make that distinction. Participants made recognition judgments on famous and non-famous faces while galvanic skin responses (GSR), zygomatic muscle activity, and heart rate (HR) were recorded. We found increases in GSR (autonomic arousal), and zygomatic muscle activity (positive …