ReminiScentia: shaping olfactory interaction in a personal space for multisensory stimulation therapy

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ORIGINAL ARTICLE

ReminiScentia: shaping olfactory interaction in a personal space for multisensory stimulation therapy Raúl Casillas-Figueroa 1 & Alberto L. Morán 1 & Victoria Meza-Kubo 1 & Cristina Ramírez-Fernández 2 Christian Acosta-Quiroz 3 & Felipe Orihuela-Espina 4 & Samuel Montero-Hernandez 5

&

Received: 16 May 2020 / Accepted: 28 September 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020

Abstract Recently, multimodal interfaces are incorporating smell as an additional means of interaction. Devices called olfactory displays have been designed to improve applications with various objectives, such as notifying or alerting through scents, increasing immersion in virtual or augmented reality applications, or learning and enhancement of mental functions. Based on the potential of olfactory memory to evoke memories and emotions to benefit health and well-being, we propose ReminiScentia as an olfactory display to generate and deliver scents. This work presents an evaluation of the effectiveness of ReminiScentia in evoking brain responses similar to those generated by manually delivered scents. To achieve this, we monitored the hemodynamic responses during manual and ReminiScentia olfactory stimulation over the prefrontal cortex (PFC) by using a functional near-infrared spectroscopy (fNIRS) device in 33 healthy subjects. Among the results, it was found that when ReminiScentia was used to deliver the olfactory stimuli, there is no statistically significant difference in the magnitude of concentration changes of OxyHb in the PFC between manual deliver and ReminiScentia (Wilcoxon: p > 0.05). The effectiveness of the use of ReminiScentia has allowed us not only its application for the evocation of memories in a multisensory therapy but also to propose an olfactory interaction design space where olfactory stimuli are used to provide feedback or instructions in multisensory stimulation activities that could support the training of higher mental functions such as memory and learning in patients with cognitive disabilities. Keywords Multisensory stimulation . Olfactory display . Olfactory interaction space . fNIRS evaluation

1 Introduction Cognitive impairment is due to a decrease in higher mental functions such as intelligence, language, and learning, as well as motor functions [6]. The rehabilitation of patients with a

cognitive disability is carried out with a structured set of therapeutic activities designed to train the individual’s ability to think, use judgment, and make decisions. One of the most used methods for cognitive rehabilitation is multisensory stimulation (MS) [3], which is a therapeutic specialty that is based

* Victoria Meza-Kubo [email protected]

Samuel Montero-Hernandez [email protected]

Raúl Casillas-Figueroa [email protected]

1

Facultad de Ciencias, Universidad Autónoma de Baja California, Ensenada, Mexico

Alberto L. Morán [email protected]

2

Tecnológico Nacional de México/I. T. de Ensenada, Ensenada, Mexico

Cristina Ramírez-Fernández [email protected]