Paralysis

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As fear Rigid one calls a special, by threats - or stressful situations triggered state in humans or animals . In the English-language specialist literature, paralysis is usually referred to as defensive immobility or freezing-like behavior .

In dangerous and stressful situations, the adrenal medulla releases the stress hormone adrenaline . The adrenaline increases the heartbeat ( tachycardia ), with which the muscles are better supplied with more oxygen in order to prepare the body for a fight or a flight ( fight-or-flight ). A number of unneeded organs and parts of the brain are shut down in their function. But if there is no reaction in the form of fight or flight, then after up to 15 seconds a paralysis of fear can occur, in which the threatened living being can neither flee nor fight. It literally freezes with fear. The heartbeat falls (fear bradycardia), the muscles stiffen and control over the body functions decreases significantly. Rigid anxiety and anxiety bradycardia are triggered by nerve impulses. They are intended to ensure survival in dangerous situations.

Individual evidence

  1. E. Lengauer paralyzed fear is evolutionary. In: innovations-report.de of June 21, 2005

literature

  • MG Pereira et al .: Sustained and Transient Modulation of Performance Induced by Emotional Picture Viewing. In: Emotion 6/2006, pp. 622-34. PMID 17144753
  • TM Azevedo et al: A freezing-like posture to pictures of mutilation. In: Psychophysiology 42/2005, pp. 255-60. PMID 15943678
  • LD Facchinetti ua: Postural modulation induced by pictures depicting prosocial or dangerous contexts. In: Neurosci Lett 410/2006 pp. 52-6. PMID 17056179
  • AV Kalueff et al: Anxiety and otovestibular disorders: Linking behavioral phenotypes in men and mice. In: Behavioral Brain Research 186/2008, pp. 1-11. PMID 17822783
  • F. Calvo F, NC Coimbra: Interactions between opioid-peptides-containing pathways and GABA (A) -receptors-mediated systems modulate panic-like-induced behaviors elicited by electric and chemical stimulation of the inferior colliculus. In: Brain Res. 1104/2006, pp. 92-102. PMID 16797498
  • A. Mackay-Sim, DG Laing: Rats' responses to blood and body odors of stressed and non-stressed conspecifics. In: Physiol Behav 27/1981, pp. 503-10.

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