What is the control center of the parasympathetic nervous system? What is the center of control for the sympathetic nervous system?
Both sympathetic and parasympathetic comes under Autonomous Nervous System and their control center is Hypothalamus- part of fore brain.
Autonomous nervous system(ANS) is a part of peripheral motor nerves. ANS controls activities of internal organs which are important to maintain homeostasis, through visceral reflexes, not under conscious control.
Hypothalamus of fore brain mainly control the ANS. There are antagonistic effects of sympathetic and parasympathetic on the same organ. For example heart rate is increased during excitement by sympathetic but lowered during sleep by parasympathetic.