TY - JOUR
T1 - Topography and sources of electromagnetic cerebral responses to electrical and air-puff stimulation of the hand
AU - Rossini, P. M.
AU - Deuschl, G.
AU - Pizzella, V.
AU - Tecchio, F.
AU - Pasquarelli, A.
AU - Feifel, E.
AU - Romani, G. L.
AU - Lücking, C. H.
PY - 1996
Y1 - 1996
N2 - SEPs and SEFs after air-puff stimulation of index and little fingers have been studied and compared to the responses following electrical stimulation of the same digits and of the median nerve at the wrist in 5 subjects. The differences in morphology of the evoked signals are described and the generator characteristics are analysed for SEFs by means of a moving dipole model inside a homogeneous sphere. In our measurements the magnetic fields following electrical finger stimulation show a 30 msec component, which was absent following air-puff stimulation. This could not be seen in the electric field activity, The generators of the first component of SEFs after air-puff finger stimulation proved to be deeper (8 mm on average across all subjects and for both fingers) than in the case of electrically evoked SEFs. A similar behaviour was also observed for the second component of SEFs for the 2 stimulus modalities.
AB - SEPs and SEFs after air-puff stimulation of index and little fingers have been studied and compared to the responses following electrical stimulation of the same digits and of the median nerve at the wrist in 5 subjects. The differences in morphology of the evoked signals are described and the generator characteristics are analysed for SEFs by means of a moving dipole model inside a homogeneous sphere. In our measurements the magnetic fields following electrical finger stimulation show a 30 msec component, which was absent following air-puff stimulation. This could not be seen in the electric field activity, The generators of the first component of SEFs after air-puff finger stimulation proved to be deeper (8 mm on average across all subjects and for both fingers) than in the case of electrically evoked SEFs. A similar behaviour was also observed for the second component of SEFs for the 2 stimulus modalities.
KW - Air-puff finger stimulation
KW - Electrical hand stimulation
KW - Somatosensory evoked fields
KW - Somatosensory evoked potentials
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U2 - 10.1016/0168-5597(95)00275-8
DO - 10.1016/0168-5597(95)00275-8
M3 - Article
C2 - 8681864
AN - SCOPUS:0030001242
SN - 0168-5597
VL - 100
SP - 229
EP - 239
JO - Electroencephalography and Clinical Neurophysiology - Evoked Potentials
JF - Electroencephalography and Clinical Neurophysiology - Evoked Potentials
IS - 3
ER -