jerkily
1. [ adverb ] with spasms
Synonyms: spasmodically
Examples:

"the mouth was slightly open, and jerked violently and spasmodically at one corner"

Related terms: arrhythmic convulsive arrhythmic convulsive
2. [ adverb ] with jerking motions
Examples:

"She rose stiffly, jerkily from the window seat"