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).
Although the ANS is also known as the visceral nervous system, the ANS is only connected with the motor side. Most autonomous functions are involuntary but they can often work in conjunction with the somatic nervous system which provides voluntary control.