The Collaborative International Dictionary of English v.0.48:

Neurologic \Neu`ro*log"ic\, Neurological \Neu`ro*log"ic*al\, a.
   Of or pertaining to neurology.
   [1913 Webster]

WordNet (r) 3.0 (2006):

neurological
    adj 1: of or relating to or used in or practicing neurology;
           "neurological evidence" [syn: neurological,
           neurologic]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "neurological":
   allopathic, chiropodic, chiropractic, clinical, dental, exodontic,
   homeopathic, hydropathic, iatric, medical, naturopathic, nerval,
   nervous, neural, obstetric, orthodontic, orthopedic, osteopathic,
   pediatric, periodontic, prosthodontic, surgical