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Stress, whether physiological, biological or psychological, is an organism's response to a stressor such as an environmental condition. [1] When stressed by stimuli that alter an organism's environment, multiple systems respond across the body. [ 2 ]
Real or perceived threat in the environment elicits stress response in animals, which disrupts internal homeostasis. [2] Physiological changes cause behavioural responses in animals, including: impairment of response inhibition and lack of motivation, [3] as well as changes in social, sexual, [4] [5] aggression [6] and nurture [7] [8] behaviour ...
This physiological stress response involves high levels of sympathetic nervous system activation, often referred to as the "fight or flight" response. The response Archived 2012-10-10 at the Wayback Machine involves pupil dilation, release of endorphins , increased heart and respiration rates, cessation of digestive processes, secretion of ...
Traumatic events or any type of shock to the body can cause an acute stress response disorder (ASD). The extent to which one experiences ASD depends on the extent of the shock. If the shock was pushed past a certain extreme after a particular period in time ASD can develop into what is commonly known as Post-traumatic stress disorder (PTSD). [11]
If the brain persistently interprets or even anticipates stress, then it may cause epigenetic changes to permanently adapt to a chronic state of arousal that results in physiological changes such as thickened blood vessels to support the increased cardiac output and down-regulation of stress hormone receptors.
Allostatic load is the accumulation of stressors and maladaptive responses that may result in an extreme state, where the stress response does not terminate. [ 26 ] The long-term impact of childhood adversity (e.g., abuse, neglect) has been shown to have lasting effects, including the increased risk for allostatic load in adulthood. [ 27 ]
Holiday Stress and Anxiety: 6 Ways to Cope. The holiday season is often called the most wonderful time of the year — but for many, it can actually be the most stressful time of year.
Chronic stress is the physiological or psychological response induced by a long-term internal or external stressor. [1] The stressor, either physically present or recollected, will produce the same effect and trigger a chronic stress response. [ 1 ]