Effects of olfactory stimulation on autobiographical memory in Alzheimer's disease

Glachet, Ophélie; Gandolphe, Marie-Charlotte; Gallouj, Karim; Antoine, Pascal; Haj, Mohamad El

doi:10.1684/pnv.2018.0748

Cited by 14 publications

(20 citation statements)

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“…This study was the first to demonstrate the beneficial effect of olfactory cueing in AD and has important clinical implications, as olfactory cues could serve as a useful tool to stimulate autobiographical memory in this pathology. In a related vein, Glachet et al [21] found similar results for specificity and recovery time. They also showed that compared with memories evoked without odor, odor-evoked autobiographical memories were characterized by a higher subjective reliving in AD.…”

Section: Introductionmentioning

confidence: 62%

“…To summarize, while previous research has demonstrated positive effects of odor on autobiographical in AD [2,21], it did not evaluate the impact of olfactory cueing on arousal and emotional valence of these memories. We therefore evaluated whether odor exposure may enhance the subjective reliving and the emotional properties of autobiographical memories in AD.…”

Section: Introductionmentioning

confidence: 99%

“…Studies have tried to alleviate impairment of autobiographical memory in AD by focusing on sensory cues. Some studies have shown that powerful perceptive cues such as music and odor have a beneficial impact on the involuntary retrieval of autobiographical memories in AD, principally by diminishing the time taken to retrieve these memories [2,8,21]. Involuntary autobiographical memories were described by [22] as conscious memories of personal events that come to mind spontaneously.…”

Section: Introductionmentioning

confidence: 99%

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Emotional and Phenomenological Properties of Odor-Evoked Autobiographical Memories in Alzheimer’s Disease

Glachet

Haj

2019

Brain Sciences

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Autobiographical memory, which contains all personal memories relative to our identity, has been found to be impaired in Alzheimer’ Disease (AD). Recent research has demonstrated that odor may serve as a powerful cue for the recovery of autobiographical memories in AD. Building on this research, we investigated emotional characteristics (arousal and valence) and subjective reliving of odor-evoked autobiographical memories in AD. We also investigated the relationship between these characteristics and depression. To this end, we invited participants with mild AD and controls to retrieve autobiographical memories after odor exposure or without odor. Results showed higher arousal, subjective reliving and more positive memories after odor exposure compared with the odor-free condition, these differences being observed only in AD participants. We also found that emotion (arousal and valence) and subjective reliving triggered by odor were associated with depressive symptoms in AD. These findings demonstrate that odor may be a useful cue to trigger more detailed, vivid and positive events in AD.

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Section: Introductionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Emotional and Phenomenological Properties of Odor-Evoked Autobiographical Memories in Alzheimer’s Disease

Glachet

Haj

2019

Brain Sciences

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“…They also observed shorter retrieval time for memories cued by odor than for those evoked by no cue. Glachet et al [160] found similar results for specificity and recovery time. This study also observed odor-evoked autobiographical memories with higher subjective reliving in AD.…”

Section: Emotional Sensorial Stimulations and Self-consciousness In Amentioning

confidence: 63%

“…To our knowledge, only five studies have examined the impact of odor on autobiographical remembering in AD [123,[160][161][162][163]. All studies have demonstrated the positive effects of odor on personal event memories.…”

Section: Emotional Sensorial Stimulations and Self-consciousness In Amentioning

confidence: 99%

Could Self-Consciousness Be Enhanced in Alzheimer’s Disease? An Approach from Emotional Sensorial Stimulation

Arroyo-Anlló

Sánchez

2020

JAD

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Alzheimer’s disease (AD) provides a valuable field of research into impairment of self-consciousness (SC), because AD patients have a reduced capacity to understand their mental world, to experience and relive previous personal events, as well as to interpret thoughts, feelings, and beliefs about themselves. Several studies observed that AD patients had an altered SC, but not a complete abolition of it. Emotions are an integral part of the construction of personal identity, therefore of Self. In general, most studies on emotion in AD patients have observed that emotion is not completely abolished and it lets them better remember autobiographical events with greater emotional charge. The positive effect of autobiographical memories rich in emotional content, evoked directly/automatically by sensorial stimuli such as familiar odors or music, could be used to reestablish/reinforce the permanence and coherence of the Self in AD. We studied the research of empirical evidence supporting the power of the sensorial cues associated with emotion, which could be capable of enhancing the SC in AD. We presented the studies about “Emotional stimulations” using odor, music, or taste cues in AD. All studies have shown to have a positive impact on SC in AD patients such as odor-evoked autobiographical memories, taste/odor-evoked autobiographical memories, emotional sensorial stimulation using musical cues, and multi-sensorial stimulations using healing gardens. We found research supporting the notion that emotional sensorial stimulations can even temporarily exalt memory, affective state, and personal identity, that is, the SC in AD. The emotional sensory stimulations could be used as a tool to activate the SC in AD and hence improve the quality of life of patients and caregivers.

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Olfaction and Health

Herz

2021

Olfaction: An Interdisciplinary Perspective From Philosophy to Life Sciences

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Effects of olfactory stimulation on autobiographical memory in Alzheimer's disease

Cited by 14 publications

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Emotional and Phenomenological Properties of Odor-Evoked Autobiographical Memories in Alzheimer’s Disease

Emotional and Phenomenological Properties of Odor-Evoked Autobiographical Memories in Alzheimer’s Disease

Could Self-Consciousness Be Enhanced in Alzheimer’s Disease? An Approach from Emotional Sensorial Stimulation

Olfaction and Health

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