Search results
Results from the WOW.Com Content Network
You probably know that your nervous system is the intricate network of the brain, spine, and nerves that control your thoughts, emotions, and bodily functions like breathing, sleep, and movement.
Acute stress can also affect a person's neural correlates which interfere with the memory formation. During a stressful time, a person's attention and emotional state may be affected, which could hinder the ability to focus while processing an image. Stress can also enhance the neural state of memory formation. [clarification needed] [29]
Anxiety is an emotion characterised by an unpleasant state of inner turmoil and includes feelings of dread over anticipated events. [1] [2] [3] Anxiety is different from fear in that fear is defined as the emotional response to a present threat, whereas anxiety is the anticipation of a future one. [4]
In humans and most mammals, the autonomic nervous system and hypothalamic-pituitary-adrenal (HPA) axis are the two major systems that respond to stress. [3] Two well-known hormones that humans produce during stressful situations are adrenaline and cortisol .
Stress and trauma can affect expression of transcription factors, which in turn alter DNA methylation patterns. For example, transcription factor nerve growth-induced protein A (NGFI-A, also called NAB1) is up-regulated in response to high maternal care in rodents, and down-regulated in response to low maternal care (a form of early life stress).
Adrenergic agents affect the levels of norepinephrine and epinephrine in the nervous system. NE is a neurotransmitter associated with the regulation of various cognitive functions including stress responses, arousal, vigilance, and anxiety.
Chronic stress also causes greater response to fear of the unlearned in the nervous system, and fear conditioning. [16] In the immune system, the increase in levels of chronic stress results in the elevation of inflammation. The increase in inflammation levels is caused by the ongoing activation of the sympathetic nervous system. [5]
Anxiety disorders — characterized by uneasiness, worry, and fear — can cause various symptoms that affect how you think and behave. This can include changes in appetite (aka your body’s ...