Hepatitis B: Symptoms. In many cases there are no symptoms in the early stages of hepatitis B infection. Many children and some adults do not develop any symptoms until complications, such as cirrhosis develop. Symptoms of hepatitis B can include flu-like symptoms, fever, headache, nausea, muscle aches and weakness.
The autonomic nervous system (ANS) is a very complex, multifaceted neural network that maintains internal physiologic homeostasis. This network includes cardiovascular, thermoregulatory, GI, genitourinary (GU), and ophthalmologic (pupillary) systems (see the following image).
Stress and heart rate variability. The autonomic nervous system (ANS) is the part of the. peripheral nervous system that serves as a control. mechanism to maintain the body under stable conditions. (homeostasis). The ANS contains two main branches, the. sympathetic nervous system (SNS) and the parasympathetic.