The low, throaty voice drew his head around in an almost involuntary action.

An involuntary action is one which occurs without the conscious choice of an organism.

Verbs which involve involuntary action or states are conjugated with the patient series.

To close and open, or "wink", both eyes is usually an involuntary action known as a "blink".

"I am not quite clear on the proper etiquette for such involuntary actions," he professed.

The hiccup is an involuntary action involving a reflex arc.

The involuntary action caused his heart to visibly pound in his chest.

Urge incontinence is caused by involuntary actions of the bladder muscles.

The swallowing was an automatic, involuntary action and not a sign of awareness on any level whatsoever.