spasmodic

Relating to, affected by, or having the character of a spasm; convulsive.

Happening intermittently; fitful.

Given to sudden outbursts of energy or feeling; excitable.

Pertaining to, of the nature of, or characterized by spasm; affected by spasm or spasms; convulsive.

Attended by or manifesting procedure by fits and starts; jerky; overstrained; high-strung; rhapsodical.