Search results
Results from the WOW.Com Content Network
Fear is an unpleasant emotion that arises in response to perceived dangers or threats.Fear causes physiological and psychological changes. It may produce behavioral reactions such as mounting an aggressive response or fleeing the threat, commonly known as the fight-or-flight response.
The experience of pain is individualistic and can be suppressed by stress or exacerbated by anticipation. Simple activation of a nociceptor does not always lead to perceived pain, because the latter also depends on the frequency of the action potentials, integration of pre- and postsynaptic signals, and influences from higher or central processes.
These can be released in response to a number of things, including increased blood pressure, pain and danger. It has been found that endogenous opioids are at least partially responsible for phenomena like " Runner's high ", hypoalgesia in the fight-or-flight response, and even for the analgesic effects of acupuncture therapy. [ 2 ]
Marginal nucleus of the spinal cord are the only unsuppressible pain signals. The parabrachial area integrates taste and pain info, then relays it. Parabrachial checks if the pain is being received in normal temperatures and if the gustatory system is active; if both are so the pain is assumed to be due to poison.
Fear is an emotional response to a current perceived danger. This differs from anxiety which is a response in preparation of a future threat. Fear and anxiety often can overlap but this distinction can help identify subtle differences between disorders, as well as differentiate between a response that would be expected given a person's ...
Anger, when viewed as a protective response or instinct to a perceived threat, is considered as positive. The negative expression of this state is known as aggression commits antisocial personality disorder [19] and Intermittent explosive disorder. Acting on this misplaced state is rage due to possible potential errors in perception and judgment.
If a stimulus is perceived as a threat, a more intense and prolonged discharge of the locus ceruleus activates the sympathetic division of the autonomic nervous system. [11] The activation of the sympathetic nervous system leads to the release of norepinephrine from nerve endings acting on the heart, blood vessels, respiratory centers, and ...
Insensitivity to pain means that the painful stimulus is not even perceived: a patient cannot describe the intensity or type of pain. Indifference to pain means that the patient can perceive the stimulus, but lacks an appropriate response: they do not flinch or withdraw when exposed to pain.