New theory proposed for hearing microwaves
Harvey J. Hindin · 1974
Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 2,030 studies in Brain & Nervous System
Harvey J. Hindin · 1974
Joines WT, Spiegel RJ · 1974
Researchers modeled the human skull as six concentric layers (skin, fat, bone, dura, cerebrospinal fluid, and brain) and calculated microwave absorption across the 0.1-3 GHz band for skull radii of 7 cm and 10 cm. The inhomogeneous model showed a broad absorption peak near 2.1 GHz with peak values of 1.52 for the 7 cm radius and 3.38 for the 10 cm radius, a peak not present in the homogeneous model.
Jin H. Kinoshita · 1974
E. Stanton Maxey, M.D. · 1974
John Schrot, T. Daryl Hawkins · 1974
At each exposure duration, mortality increased with higher incident energy density, and the energy density required to kill 50% of rats rose from 1.18 to 1.67 W-min/cm² as duration increased from 30 to 240 seconds. The corresponding lethal power density fell from 2.36 to 0.42 W/cm², an 85% decrease across the duration range. Heavier rats weighing 195 to 210 g were more vulnerable than lighter rats weighing 180 to 194 g.
Hindin HJ, Frey AH · 1974
S. Lang · 1974
Researchers measured electrostatic charges from mice and rats and found an average field strength of 200 V/m. Total population activity depended on animal density in cages, explained by thigmotaxis. Higher density increased touch frequency and rubbing, raising field strength until animals reduced activity to match a nominal value.
B. Appleton · 1974
Biomicroscopically detectable lens signs considered precursors of cataract occurred equally in both groups. A registry of seven acute high-level microwave exposures found no superficial burns or eye damage, with ocular status consistent with age. The authors concluded that lens damage probably has not occurred from cumulative low-level exposure and probably could not occur from acute exposure without severe facial burns. A separate study of 19 diathermy workers showed no difference in ocular examinations compared to controls.
DAVID McK. RIOCH, M.D. · 1974
Joseph Bastian · 1974
Arthur W. Guy, James C. Lin, C.K. Chou · 1974
Researchers conducted in vivo and in vitro studies of nervous tissues exposed to microwave radiation. Continuous-wave microwaves affected conduction and transmission latencies and amplitudes of evoked potentials in the central nervous system of anesthetized cats, isolated cat nerves, and rabbit ganglia similarly to localized conduction heat. Temperature rises were always associated with any observable changes in the nervous tissues exposed to continuous-wave irradiation. The threshold for latency changes occurred between 2.5 and 5.0 W/kg of absorbed power density, about one-quarter to one-half of the normal metabolic rate of brain tissue.
A.Portela et al. · 1974
L. T. Rutledge, C. Wright, J. Duncan · 1974
H. H. Seliger et al. · 1974
The transients were confirmed to be thermal in origin by temperature dependence. Similar transients were observed in biological tissues. At human hearing threshold, the transients produce about 90 db in the audible band, above the expected bone-conduction threshold.
Eldon Byrd · 1974
The author states that the paper will explore recent findings concerning possible external and internal electrical influences on psychodynamic development and states. Rhythms are described as the central theme, with their initiation, maintenance, and correlation at the core of normal and pathological psychodynamic states. Severe brain damage eliminates adrenal steroid hormone circadian rhythm. The deaf can respond to pulse-modulated electronic transmitters, implying a possible cellular response integrated by an organ or the brain.
Arthur W. Guy, James C. Lin, Piro O. Kramar, Ashley F. Emery · 1974
Absorbed power peaked in the vitreous body at 0.92 mW/cm² per 1 mW/cm² incident power. Eye temperatures reached plateaus after 15-20 minutes, with 100 mW/cm² staying below 41°C while 200 and 300 mW/cm² exceeded 41°C. Eighty-one rabbits were used to determine the cataractogenic threshold for 2450 MHz radiation.
King, Hunt, Phillips · 1974
K. Foster · 1974
The transients were confirmed as thermal by their disappearance at 4°C where water's expansion coefficient vanishes. At the human hearing threshold, microwave pulses produced 90 dB pressure transients, above the 80 dB bone-conduction threshold for noise bursts.
Eugene M. Taylor, Bonnie T. Ashleman · 1974
JAMES P. MILLER · 1974
William M. Houk, Sol M. Michaelson · 1974
J.H. Gold, J.C. Schuder · 1973
M. L. Singewald et al. · 1973
W. B. STAVINOHA, S. T. WEINTRAUB, A. T. MODAK · 1973
Uniform cholinesterase inactivation was achieved in rat brain within 4 s and in mouse brain within 2 s. In rats, whole-brain acetylcholine was 25-4 + 1-5 nmol/g after irradiation compared to 13:8 + 1-7 nmol/g after standard sacrifice. In mice, whole-brain acetylcholine was 25:5 + 2:6 nmol/g after irradiation compared to 13-7 + 1:7 nmol/g after standard sacrifice.
Ronald J. Spiegel, William T. Jones · 1973
The paper introduces a semiclassical theory that treats the electromagnetic field classically and the membrane dipoles quantum mechanically using the density matrix approach. The model assumes a double-dipole layer membrane where nerve excitation occurs when enough outer dipoles flip orientation to reduce the potential barrier.