The worst of all were the mood swings he seemed to suffer without discernible cause.

They live to almost 50 months, and sometimes die of no discernible cause.

At times they clutched their bodies, for no immediately discernible cause but with obvious anxiety.

In some patients, no discernible cause was ever found.

This was an immediate, positive trepidation without discernible cause, an invisible someone shouting "boo!"

She had been suffering from psychotic berserker fits that had no discernible cause.

Worse still, there was no discernible cause.

The disorder is usually characterized by the mysterious spread of a variety of symptoms without a discernible cause.

He found that he was breathing quickly, but there was no discernible cause.

It was the ancient Greeks who first identified hysteria as the manifestation of physical symptoms with no discernible organic cause.