Energy Transfer Required For Remote Neural Effects
The work of Courtney et al. supports the role of a ballistic pressure wave in incapacitation and injury. The work of Suneson et al. and Courtney et al. suggest that remote neural effects can occur with levels of energy transfer possible with handguns, about 500 ft·lbf (680 J). Using sensitive biochemical techniques, the work of Wang et al. suggests even lower impact energy thresholds for remote neural injury to the brain. In analysis of experiments of dogs shot in the thigh they report highly significant (p < 0.01), easily detectable neural effects in the hypothalamus and hippocampus with energy transfer levels close to 550 ft·lbf (750 J). Wang et al. reports less significant (p < 0.05) remote effects in the hypothalamus with energy transfer just under 100 ft·lbf (140 J).
Even though Wang et al. document remote neural damage for low levels of energy transfer, roughly 100 ft·lbf (140 J), these levels of neural damage are probably too small to contribute to rapid incapacitation. Courtney and Courtney believe that remote neural effects only begin to make significant contributions to rapid incapacitation for ballistic pressure wave levels above 500 psi (3,400 kPa) (corresponds to transferring roughly 300 ft·lbf (410 J) in 12 inches (30 cm) of penetration) and become easily observable above 1,000 psi (6,900 kPa) (corresponds to transferring roughly 600 ft·lbf (810 J) in 12 inches (0.30 m) of penetration). Incapacitating effects in this range of energy transfer are consistent with observations of remote spinal injuries, observations of suppressed EEGs and apnea in pigs and with observations of incapacitating effects of ballistic pressure waves without a wound channel.
Read more about this topic: Hydrostatic Shock
Famous quotes containing the words energy, transfer, required, remote and/or effects:
“There are no accidents, only nature throwing her weight around. Even the bomb merely releases energy that nature has put there. Nuclear war would be just a spark in the grandeur of space. Nor can radiation “alter” nature: she will absorb it all. After the bomb, nature will pick up the cards we have spilled, shuffle them, and begin her game again.”
—Camille Paglia (b. 1947)
“If it had not been for storytelling, the black family would not have survived. It was the responsibility of the Uncle Remus types to transfer philosophies, attitudes, values, and advice, by way of storytelling using creatures in the woods as symbols.”
—Jackie Torrence (b. 1944)
“She, as a veil down to the slender waist,
Her unadorned golden tresses wore
Dishevelled, but in wanton ringlets waved
As the vine curls her tendrils, which implied
Subjection, but required with gentle sway,
And by her yielded, by him best received,
Yielded with coy submission, modest pride,
And sweet, reluctant, amorous delay.
Nor those mysterious parts were then concealed:
Then was not guilty shame: dishonest Shame
Of Nature’s works, Honour dishonourable.”
—John Milton (1608–1674)
“All our civilization had meant nothing. The same culture that had nurtured the kindly enlightened people among whom I had been brought up, carried around with it war. Why should I not have known this? I did know it, but I did not believe it. I believed it as we believe we are going to die. Something that is to happen in some remote time.”
—Mary Heaton Vorse (1874–1966)
“I am fearful that the paper system ... will ruin the state. Its demoralizing effects are already seen and spoken of everywhere ... I therefore protest against receiving any of that trash.”
—Andrew Jackson (1767–1845)