Neural correlates of semantic and episodic memory retrieval

Wiggs, Cheri L.; Weisberg, Jill; Martin, Alex

doi:10.1016/s0028-3932(98)00044-x

Cited by 212 publications

(127 citation statements)

References 39 publications

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“…The integrity of this system is a prerequisite for successful retrieval from episodic memory. In particular, neuroimaging studies (von Zerssen et al, 2001; Wiggs et al, 1999) and studies with patients suffering from retrosplenial amnesia (von Cramon and Schuri, 1992) point to a specific role of this area in integrating various aspects of episodic information rather than in storage of episodic memories. The lateral temporal lobes, also demonstrating decreased activity, are thought to be engaged in lexical-semantic processing (Kotz et al, 1999;Newman and Twieg, 2001).…”

Section: Discussionmentioning

confidence: 99%

Interactions of the hippocampal system and the prefrontal cortex in learning language-like rules

2003

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One of the most influential views on the hippocampal function suggests that this brain region is critically involved in relational memory processing, that is, binding converging inputs to mediate the representation of relationships among the constituents of episodes. It has been proposed that this binding is automatic and obligatory during learning and remembering In addition, neuroimaging studies have highlighted the importance of the prefrontal cortex, in learning, memory, and language processing. However, the posited importance of hippocampalprefrontal interaction remains to be empirically tested. In the present study we used functional magnetic resonance imaging to examine in detail this interaction by assessing learning-related changes in hemodynamic activity during artificial language acquisition. It has been shown previously that artificial grammar systems might be learned by evaluating pattern-based relations in word sequences and generalizing beyond specific word order, that is, rule abstraction. During scanning, participants learned an artificial language whose miniature grammar meets the universal principles of a natural language. Increased proficiency level of the artificial language is associated with decreased left hippocampal activity. In contrast, we observed an increased recruitment of the left inferior frontal gyrus (Broca's area), a region that contributes to syntax processing in natural language. The present results, therefore, indicate a learning-related change in brain circuitry underlying relational processes of language learning, with a transition from a similarity-based learning system in the medial temporal lobes to a language-related processing system in the left prefrontal cortex.

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Section: Discussionmentioning

confidence: 99%

Interactions of the hippocampal system and the prefrontal cortex in learning language-like rules

2003

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“…remembering an endorser's latest hit movie), or in brain areas associated with the retrieval of episodic memories, which are context-specific memories that are unique to each individual (e.g. remembering what happened after you saw that specific endorser's movie) (Tulving, 1972;Wiggs et al, 1999). In case the perception of a celebrity triggers both the retrieval of semantic and episodic memories, both memory networks will be activated during the presentation of a famous face.…”

Section: Neural Correlatesmentioning

confidence: 99%

“…In case the perception of a celebrity triggers both the retrieval of semantic and episodic memories, both memory networks will be activated during the presentation of a famous face. Retrieving semantic information, as compared to episodic experience, has been shown to activate consistently the superior prefrontal cortex and middle temporal gyrus, predominantly in the left hemisphere (Simons and Spiers, 2003;Wiggs et al, 1999). The retrieval of episodic memories has mainly been associated with an increase in activity in the left parietal and medial prefrontal cortex, and the medial temporal lobe (Maguire, 2001;Wagner et al, 2005).…”

Section: Neural Correlatesmentioning

confidence: 99%

Celebrities and shoes on the female brain: The neural correlates of product evaluation in the context of fame

Stallen¹,

Smidts²,

Rijpkema³

et al. 2010

Journal of Economic Psychology

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AND KEYWORDS AbstractCelebrity endorsement is omnipresent. However, despite its prevalence, it is unclear why celebrities are more persuasive than (equally attractive) non-famous endorsers. The present study investigates which processes underlie the effect of fame on product memory and purchase intention by the use of functional magnetic resonance imaging methods. We find an increase in activity in the medial orbitofrontal cortex (mOFC) underlying the processing of celebrity-product pairings. This finding suggests that the effectiveness of celebrities stems from a transfer of positive affect from celebrity to product. Additional neuroimaging results indicate that this positive affect is elicited by the spontaneous retrieval of explicit memories associated with the celebrity endorser. Also, we demonstrate that neither the activation of implicit memories of earlier exposures nor an increase in attentional processing is essential for a celebrity advertisement to be effective. By explaining the neural mechanism of fame, our results illustrate how neuroscience may contribute to a better understanding of consumer behavior.Free Keywords celebrity endorsement, persuasion, medial orbital frontal cortex, affect transfer, neuromarketing, Celebrity endorsement is omnipresent. However, despite its prevalence, it is unclear why celebrities are more persuasive than (equally attractive) non-famous endorsers. The present study investigates which processes underlie the effect of fame on product memory and purchase intention by the use of functional magnetic resonance imaging methods. We find an increase in activity in the medial orbitofrontal cortex (mOFC) underlying the processing of celebrity-product pairings. This finding suggests that the effectiveness of celebrities stems from a transfer of positive affect from celebrity to product. Additional neuroimaging results indicate that this positive affect is elicited by the spontaneous retrieval of explicit memories associated with the celebrity endorser. Also, we demonstrate that neither the activation of implicit memories of earlier exposures nor an increase in attentional processing is essential for a celebrity advertisement to be effective. By explaining the neural mechanism of fame, our results illustrate how neuroscience may contribute to a better understanding of consumer behavior.2

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“…Studies of episodic memory implicate the PCC in successful retrieval across a multitude of stimulus types and various presentation modalities. For example, PCC activation is elicited during recognition of sounds (Shannon & Buckner, 2004), objects and pictures (Shannon & Buckner, 2004;Wiggs, Weisberg, & Martin, 1999), buildings (Maguire, Frith, & Cipolotti, 2001), dot patterns (Reber, Wong, & Buxton, 2002), and thematic narrative information (Maguire, Frith, & Morris, 1999) learned during training sessions within the laboratory. Furthermore, the PCC activation is also elicited during recognition of visual and auditory materials drawn from a person's daily life.…”

Section: Introductionmentioning

confidence: 99%

Task-dependent posterior cingulate activation in mild cognitive impairment

et al. 2006

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Neuroimaging research has demonstrated that the posterior cingulate cortex (PCC) is functionally compromised in individuals diagnosed with amnestic Mild Cognitive Impairment (MCI), a major risk factor for the development of Alzheimer's disease (AD). In functional magnetic resonance imaging (fMRI) studies with healthy participants, this same region is active during self-appraisal (requiring retrieval of semantic knowledge about the self) as well as episodic recognition of recentlylearned information. Administering both types of tasks to people with MCI may reveal important information regarding the role of the PCC in recollection. This study investigated fMRI activation in the PCC in individuals with MCI and age, gender, and education-matched controls across two tasks. The first task was a visual episodic recognition task in which participants indicated whether pictures had or had not been presented during a study session. The second task was an autobiographical self-appraisal task in which subjects rated themselves on a set of trait adjectives. Results of a conjunction analysis revealed the PCC as the sole region commonly active during both tasks in the healthy older adults. Furthermore, additional analysis revealed an interaction in the PCC indicating a task-dependent response in the MCI group. MCI participants showed PCC activation during self-appraisal, but not during episodic retrieval. These results suggest in MCI that the PCC shows functional degradation during episodic retrieval of visual information learned in the laboratory. In contrast, the PCC's role in retrieval and evaluation of highly-elaborated information regarding the self is more well-preserved.

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Neural correlates of semantic and episodic memory retrieval

Cited by 212 publications

References 39 publications

Interactions of the hippocampal system and the prefrontal cortex in learning language-like rules

Interactions of the hippocampal system and the prefrontal cortex in learning language-like rules

Celebrities and shoes on the female brain: The neural correlates of product evaluation in the context of fame

Task-dependent posterior cingulate activation in mild cognitive impairment

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