spasmodically

spasmodically
    adv 1: with spasms; "the mouth was slightly open, and jerked
           violently and spasmodically at one corner" [syn:
           {spasmodically}, {jerkily}]
    2: in spurts and fits; "I began to write intermittently and
       spasmodically"
    

Spasmodical \Spas*mod"ic*al\, a.
   Same as {Spasmodic}, a. -- {Spas*mod"ic*al*ly}, adv.
   [1913 Webster]
    

66 Moby Thesaurus words for "spasmodically":
      at haphazard, at intervals, at irregular intervals, at random,
      brokenly, by catches, by chance, by fits, by jerks, by snatches,
      capriciously, carelessly, chaotically, desultorily, disconnectedly,
      discontinuously, eccentrically, erratically, every which way,
      fitfully, flutteringly, haltingly, haphazardly, helter-skelter,
      higgledy-piggledy, hit or miss, impulsively, in snatches, in spots,
      inconsistently, inconstantly, indiscriminately, intermittently,
      irregularly, jerkily, lurchingly, nonuniformly, off and on,
      patchily, promiscuously, quakingly, quaveringly, quiveringly,
      randomly, roughly, saltatorily, shakily, shudderingly, sloppily,
      sporadically, spottily, tremblingly, tremulously, uncertainly,
      unequally, unevenly, unmethodically, unpredictably, unrhythmically,
      unsteadily, unsystematically, ununiformly, variably, waveringly,
      whimsically, wobblingly