Dodecapus: An MR-compatible system for somatosensory stimulation

Huang, Ruey‐Song; Sereno, Martin I.

doi:10.1016/j.neuroimage.2006.10.024

Cited by 85 publications

(97 citation statements)

References 84 publications

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“…1). The pneumatic control system was redesigned from the Dodecapus stimulation system (56). A full-body tactile suit includes a facial mask, a turtleneck shirt, a pair of gloves, a pair of pants, two ankle pads, and two toe pads (Fig.…”

Section: Discussionmentioning

confidence: 99%

Mapping multisensory parietal face and body areas in humans

Huang¹,

Chen²,

Tran

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

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Detection and avoidance of impending obstacles is crucial to preventing head and body injuries in daily life. To safely avoid obstacles, locations of objects approaching the body surface are usually detected via the visual system and then used by the motor system to guide defensive movements. Mediating between visual input and motor output, the posterior parietal cortex plays an important role in integrating multisensory information in peripersonal space. We used functional MRI to map parietal areas that see and feel multisensory stimuli near or on the face and body. Tactile experiments using full-body air-puff stimulation suits revealed somatotopic areas of the face and multiple body parts forming a higher-level homunculus in the superior posterior parietal cortex. Visual experiments using wide-field looming stimuli revealed retinotopic maps that overlap with the parietal face and body areas in the postcentral sulcus at the most anterior border of the dorsal visual pathway. Starting at the parietal face area and moving medially and posteriorly into the lower-body areas, the median of visual polar-angle representations in these somatotopic areas gradually shifts from near the horizontal meridian into the lower visual field. These results suggest the parietal face and body areas fuse multisensory information in peripersonal space to guard an individual from head to toe.self-defense | multisensory homunculus | wearable stimulation

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Section: Discussionmentioning

confidence: 99%

Mapping multisensory parietal face and body areas in humans

Huang¹,

Chen²,

Tran

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

123

162

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“…1a). The somatosensory component of the device was based on previous somatosensory studies (Huang and Sereno, 2007;Smith et al, 2009). Somatosensory stimuli were "air puffs" above and below the right eye delivered via flexible tubing connected to high-speed solenoids with an adjustable-flow valve (NVKF334; SMC Pneumatics).…”

Section: Stimuli and Proceduresmentioning

confidence: 99%

Altered Cross-Modal Processing in the Primary Auditory Cortex of Congenitally Deaf Adults: A Visual-Somatosensory fMRI Study with a Double-Flash Illusion

Karns¹,

Dow²,

Neville³

2012

Journal of Neuroscience

167

152

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The developing brain responds to the environment by using statistical correlations in input to guide functional and structural changesthat is, the brain displays neuroplasticity. Experience shapes brain development throughout life, but neuroplasticity is variable from one brain system to another. How does the early loss of a sensory modality affect this complex process? We examined cross-modal neuroplasticity in anatomically defined subregions of Heschl's gyrus, the site of human primary auditory cortex, in congenitally deaf humans by measuring the fMRI signal change in response to spatially coregistered visual, somatosensory, and bimodal stimuli. In the deaf Heschl's gyrus, signal change was greater for somatosensory and bimodal stimuli than that of hearing participants. Visual responses in Heschl's gyrus, larger in deaf than hearing, were smaller than those elicited by somatosensory stimulation. In contrast to Heschl's gyrus, in the superior-temporal cortex visual signal was comparable to somatosensory signal. In addition, deaf adults perceived bimodal stimuli differently; in contrast to hearing adults, they were susceptible to a double-flash visual illusion induced by two touches to the face. Somatosensory and bimodal signal change in rostrolateral Heschl's gyrus predicted the strength of the visual illusion in the deaf adults in line with the interpretation that the illusion is a functional consequence of the altered cross-modal organization observed in deaf auditory cortex. Our results demonstrate that congenital and profound deafness alters how vision and somatosensation are processed in primary auditory cortex.

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“…With this purpose in mind, an f MRI-compatible tactile stimulator, the Helix, has been developed that can deliver several stimulus combinations to the skin by means of the lateral movement of a cylinder (Ingeholm et al, 2006). Another example is the so-called Dodecapus, a pneumatic system whose function is to deliver air puffs on the body surface (Huang & Sereno, 2007). Similarly, a few other tactile stimulators have been dedicated to magnetoencephalography studies (Hoechstetter, Meinck, Henningsen, Scherg, & Rupp, 2002;Hoechstetter et al, 2000).…”

Section: Methodsmentioning

confidence: 99%