MICROANATOMY

Detailed explanation-1: -Your sympathetic nervous system is best known for its role in responding to dangerous or stressful situations. In these situations, your sympathetic nervous system activates to speed up your heart rate, deliver more blood to areas of your body that need more oxygen or other responses to help your get out of danger.

Detailed explanation-2: -If you’re suffering from chronic stress, your body spends too much time in “fight or flight” mode, carried out by the sympathetic nervous system, and not enough time in “rest and digest” mode, facilitated by the parasympathetic nervous system.

Detailed explanation-3: -The origin of the sympathetic nervous system is found within the thoracic and lumbar segments of the spinal cord also known as the thoracolumbar division (T1 to L2, 3).

Detailed explanation-4: -The increase in sympathetic nerve activity in humans during mental stress is thought to reflect the balance between two opposing forces: (1) central nervous system arousal, which is sympathoexcitatory, and (2) arterial baroreflex activation, which is sympathoinhibitory.