FIG. 5. Microwave power distribution in a forehead model neglecting resonance effects and considering only first reflections (from Nieset et al. (5), modified). | REFLECTED ABSORBED 1.5|--- FREQUENCIES FREQUENCIES | * * | * * * = 10% OF INCIDENT CENTIMETERS |Cortical * POWER |Tissue * | * @ = 20% OF INCIDENT 1.0|--- * POWER | * | * * |Bone | * * | 0.5|--- * @ @ @ * |Muscle * @ @ |Fat @ @ * |Skin @ @ @ 0|-----------|-----------|-----------|-----------|--- 0 100 1000 10000 100000 FREQUENCY (mc) FIG. 6. Area most sensitive to electromagnetic energy (shaded portion). * * * * * * * * * * * * :::::: * * * ::::::::: * * O * :::::::: * * * * * * * * * * * *** ** * * * * * * * * * * * * * * * * * * * * * * -38-