Is a neck muscle a involuntary or involuntary?

You don't have to "voluntarily" think about doing them; breathing is involuntary, otherwise everyone would pass when they went to sleep.

The cardiac and smooth muscles are involuntary. The cardiac is found only in the heart and the smooth muscles are found mostly inside the walls of organs.

Involuntary muscle (Involuntary muscles, smooth, uninucleated, non-branching muscles that are not directly controllable at will)

The heart. Even if all nervous connections are severed, the heart will beat until the tissues die from lack of oxygen. The skeletal muscles are also involuntary. :)

Heart, brain, stomach, digestion these are some of the organs but they all have muscle around it but the brain has some muscle.