title: Magnetoencephalographic recordings of visual evoked brain activity in the human fetus.
abstract: We investigated the feasibility of recording visual evoked brain activity in the human fetus by use of non-invasive magnetoencephalography (MEG). Each recording lasted 6 min and consisted of a sequence of 180 flashes with 33 ms duration delivered 2 s apart over the maternal abdomen. Four of ten fetuses included showed a response; the ranges of amplitude and latency of peak response were 15-30 x 10(-15) Tesla and 180-390 ms, respectively. Six fetuses showed no discernible response. With improvement, this method could aid in the testing of fetal neurological status throughout pregnancy.
authors.affiliation: Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, 4301 W Markham, Slot 518, Little Rock, AR 72205, USA.
authors.forename: Hari
authors.initials: H
authors.lastname: Eswaran
authors.forename: James
authors.initials: J
authors.lastname: Wilson
authors.forename: Hubert
authors.initials: H
authors.lastname: Preissl
authors.forename: Stephen
authors.initials: S
authors.lastname: Robinson
authors.forename: Jiri
authors.initials: J
authors.lastname: Vrba
authors.forename: Pam
authors.initials: P
authors.lastname: Murphy
authors.forename: Douglas
authors.initials: D
authors.lastname: Rose
authors.forename: Curtis
authors.initials: C
authors.lastname: Lowery
mesh_terms: D001921:Brain / Q000502:physiology*; D005314:Embryonic and Fetal Development / Q000502:physiology*; D005074:Evoked Potentials, Visual / Q000502:physiology*; D006801:Humans; D015225:Magnetoencephalography