β Scribed by Yee Ping Yip; Christine Capriotti; Joseph W. Y
No coin nor oath required. For personal study only.
The effects of MR exposure on the rate and specificlty of sympathetic preganglionic axonal outgrowth were examined in the chick embryo. Embryos were exposed to a static magnetic field of 1.5 T for 6 hours, 64 MHt RF field pulses, and a Switched magnetic field gradient of amplitude 0.6 G/cm for 4 hours. No significant difference in axonal outgrowth wm observed between MRβexposed and control embryos. In addition. the distributionr of several major extracellular matrix (ECM) molecules, lpmlnln, fibronectin, and collagen N, were examined. Immunoetaining patterns of these ECM molecules duxing axonal outgrowth showed no difference between MRβexpored and control embryos. Our results suggert that the MR erporure conditions used in this study do not affect axonal outgrowth in the sympathetic nervous system of the chick.
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## Abstract The potential teratogenicity of magnetic resonance (MR) field exposure on the early development of the chick embryo was examined. Eggs at four developmental stages within the first 42 hours of incubation were exposed to a static magnetic field of 1.5 T for 6 hours and to 64βMHz radioβfr