Involuntary:Done other than in accordance with the conscious will of the individual. The opposite ofvoluntary.
The terms "voluntary" and "involuntary" apply to the human nervous system and its control over muscles. The nervous system is divided into two parts --somaticand autonomic. The somatic nervous system operates muscles that are under voluntary control. The autonomic (automatic orvisceral)神经系统调节各个器官功能on and is involuntary. Opening the mouth is voluntary while blushing is involuntary.
