His medication makes him sleep quite a lot, but he is responding to all external stimulation.

From this, he deduced the prominent role that external stimulation played in the thought processes of adults.

There are also various apparatuses, with external or internal stimulation.

When you have vulnerable children, external stimulation with a fiercely aggressive quality has an incendiary effect.

While a person can be awake and conscious, he or she may not show any signs of awareness or recognition to external stimulation.

Within a few days, however, Maitland had come to terms with his blindness, and the constant need for some sort of external stimulation faded.

The word autoeroticism is occasionally used to refer to sexual feeling occurring without external stimulation.

This spell was then broken suddenly by some external stimulation.

Moderate anxiety: This is seen among people who are highly responsive to external stimulation.

A dream has all features of primary consciousness but is produced in the brain without external stimulation.