A wearable optical topography system was developed that is based on near-infrared spectroscopy (NIRS) for observing brain activity noninvasively including in regions covered by hair. An avalanche photo diode, high voltage dc-dc converter, and preamplifier were placed in an electrically shielded case to be safely mounted on the head. Rubber teeth and a glass rod were prepared to clear away hair and reach the scalp. These devices realized for the first time a wearable NIRS imager for any region of the cortex. The activity in the motor cortex during finger tapping was successfully observed.
REFERENCES
1.
A.
Maki
, Y.
Yamashita
, Y.
Ito
, E.
Watanabe
, Y.
Mayanagi
, and H.
Koizumi
, Med. Phys.
22
, 1997
(1995
).2.
M.
Pena
, A.
Maki
, D.
Kovacic
, G.
Dehaene-Lambertz
, H.
Koizumi
, F.
Bouquet
, and J.
Mehler
, Proc. Natl. Acad. Sci. U.S.A.
100
, 11702
–11705
(2003
).3.
T.
Suto
, M.
Fukuda
, M.
Ito
, T.
Uehara
, and M.
Mikuni
, Biol. Psychiatry
55
, 501
–511
(2004
).4.
M.
Suzuki
, I.
Miyai
, and T.
Ono
, Neuroimage
23
, 1020
–1026
(2004
).5.
H.
Atsumori
, M.
Kiguchi
, A.
Obata
, H.
Sato
, T.
Katura
, K.
Utsugi
, T.
Funane
, and A.
Maki
, in Proceedings of IEEE CME 2007
, Beijin
, May 2007
.6.
H.
Atsumori
, M.
Kiguchi
, A.
Obata
, H.
Sato
, T.
Katura
, K.
Utsugi
, T.
Funane
, and A.
Maki
, Rev. Sci. Instrum.
80
, 043704
(2009
).7.
Y.
Hoshi
, S.-J.
Chen
, A. Q.
Liu
, and M.
Tamura
, Research and Clinical Center for Child Development
23
, 21
–27
(2000
).8.
G.
Yurtsever
, A.
Bozkurt
, F.
Kepics
, K.
Pourrezaei
, and A.
Devaraj
, in Proceedings of the 25th Annual International Conference of the IEEE EMBS
, Cancun
, September 2003
, p. 3435
.9.
T.
Muehlemann
, D.
Haensse
, and M.
Wolf
, Opt. Express
16
, 10323
(2008
).10.
E.
Nomoto
, T.
Taniguchi
, T.
Ohtoshi
, T.
Funane
, K.
Saito
, and S.
Sasaki
, in Proceedings of IEEE IPRM 2008
, Versailles
, May 2008
.11.
Private test report of TÜV Rheinland Japan
, 12018596, 2009
.© 2012 American Institute of Physics.
2012
American Institute of Physics
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