Neither. The terms voluntary and involuntary apply to muscles, and the backbone isn't a muscle.
The muscles that control its movement are voluntary as you can consciously control them.
involuntary
Involuntary is not under your control while voluntary is.
voluntary
voluntary
both voluntary and involuntary why voluntary? because we can flap our eye lids as per our wish. why involuntary? because if anything is coming straight to our eye our eyes automatically get closed.
voluntary, a typical person can move it at will.
neck muscle is voluntary muscle i think this is correct
Voluntary .. you make the choice to for example get a soda can .. blinking, breathing are involuntary you don't have to think about it
Involuntary.
The medulla is involuntary
involuntary
involuntary