Sentences with phrase «by painful stimuli»

Nociceptive pain is caused by a painful stimulus on special nerve endings called nociceptors.

Not exact matches

Both of the painful procedures, but not the other stimuli, elicited an identically large response, detectable by an electrode placed at the top of the head approximately half a second later.

«Even the most intensely painful stimuli evoke no vocal or other response, not even a groan, withdrawal of a limb or quickening of respiration,» by the committee's standard.

Substance P works in the peripheral system by modulating the action of certain proteins that control the ability of pain - sensing neurons to respond to «painful» stimuli.

In tests of pain processing by the central nervous system, physically active older adults have lower pain perception and are better able to block responses to painful stimuli, according to the new research by Kelly M. Naugle, PhD, and colleagues of Indiana University - Purdue University Indianapolis.

The scientists discovered that a class of mechanoreceptors in the skin that detect painful mechanical stimuli are part of a feedback circuit in which excitatory neurons that produce the hormone somatostatin are inhibited by neurons that synthesize dynorphin (a natural analgesic molecule that produces effects similar to opiates).

Now scientists led by physiologist Lynne Sneddon have found 58 receptors on the face and head of a trout that respond to painful mechanical, chemical, or thermal stimuli.

The release of catecholamines in response to a painful stimulus results in tachycardia, hypertension, and an increase in oxygen consumption by the myocardium.