There are millions of sensory receptors present in the nervous system that detects the changes and are known as the stimuli that occur inside or outside the human body. The nervous system monitors things such as the temperature, sound and light from the external environment. It also detects certain changes inside the body of the organisms such as the change in PH, carbon or pressure. The nervous system converts the sensory input into electrical signals that are known as the nerve impulse which are then transmitted to the brain. These signals are then brought together for creating sensations that produce thoughts, help make decisions and add to the memory of the individual.
The modern era of the emotional research suggests that emotions are not merely feelings or mental state, but they are also accompanied by complex behavioral and psychological changes that are considered to be integral part of emotions. Anxiety and fear may result in expression of a wide range of defensive or adaptive behaviors that are a source of escaping from motivational conflict or danger. These behaviors usually depend on the repertoire and the context of the species. The nervous system uses the active coping strategies while escaping and dealing with possible threats. The autonomic changes associated that are associated with the active coping strategies can be predominantly mediated by sympathetic activations such as tachycardia or hypertension. The passive coping strategies such as freezing or immobilization are usually elicited when the nervous system sense that a threat is inescapable. This is usually characterized as autonomic inhibition and results in an increased neuroendocrine response (Steimer, 2002).
Hormones can strongly affect the behavior of the human beings. For example fear and anxiety is caused by hormonal imbalance which may then lead to suffering, pain and in extreme cases to suicide. The drug ...Show more