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The effect upon the organism of the representation of injury or of the perception of danger through the distance receptors is designated FEAR. Fear is as widely distributed in nature as is its cause, that is, fear is as widely distributed as injury.

When the latter strike the second fork the impact of the molecules of air of which the sound waves are formed will set its prongs to vibrating and it will, in turn, emit sound waves of the same length and this is called sympathetic resonance, or as we would say in wireless the forks are in tune. Sound Wave and Electric Wave Tuned Senders and Receptors.

In like manner, the deeper portions of the spinal region have been sheltered from trauma and they, too, show but little power of causing a discharge of nervous energy on receiving trauma. The various tissues and organs of the body are differently endowed with injury receptors the nociceptors of Sherrington.

He would be as completely exhausted as though he had experienced a major surgical operation or had run a Marathon race. A close analogy to the reflex process in the fighting of animals is shown in the role played by the sexual receptors in conjugation.

The benefits of pain are especially manifested in the urgent muscular actions by means of which the body moves away from physical injury; obstructions of the hollow viscera are overcome; rest is compelled in the acute infections the infected points are held rigidly quiet, the muscles of the abdomen are fixed, and harmful peristalsis is arrested in peritonitis; while there is absolutely no pain in the diseases or injuries which affect those regions of the body in which in the course of evolution no pain receptors were placed, or in those diseases in which muscular inhibition or contraction is of no help.

If so, she surmised, Hilda's mood was a combination of hormonal imbalances and withdrawal symptoms from dopamine not arriving in the pleasure receptors of her brain in quantities commensurate with that earlier experience. Hilda feigned a more pleasant smile despite herself. "Engaged as we are in contemplative leisure."

Power flowed smoothly and unfailingly into the cosmic receptors, and the products of conversion were discharged with equal smoothness and regularity from the forty-five gigantic driving projectors. The tractor beam held its heavy burden easily and the generators functioned perfectly. And finally a planet began to loom up in the stern lookout plates.

All ideas that went contrary to his expectations were dust that her mind needed to sweep away. Marriage was reality. It was the psychological and physiological completeness of two people, and as such there was a necessity for compromise no differently than the appetites of the body being catered to by the brain that developed pleasure receptors to tolerate this incompatible coexistence.

The wounding stone made an impression upon the nerve receptors in the foot similar to the innumerable injuries which gave origin to this nerve mechanism itself during the boy's vast phylogenetic or ancestral experience. The stone supplied the phylogenetic association, and the appropriate discharge of nervous energy automatically followed.

In response to an adequate stimulus, the nervous system is integrated for a specific purpose by the stimulated receptor, and but one stimulus at a time has possession of the final common path the nerve mechanisms for action. The most numerous receptors are those for harmful contact; these are the nociceptors.