highly strung

He inherited in exaggerated degree his mother's highly strung nervous nature.

His early disposition was joyous, but with the feverish joy of a highly-strung, nervous organization.

Though giants are often phlegmatic, his big frame embedded highly-strung nerves.

He found that my pulse was high, my eyes dilated, my nerves highly strung, but no alarming symptoms.

They touched the most tender chords in the man's highly-strung gentle nature.