Which discipline of neuroscience studies nervous system disorders?
Neurology (from , "string, nerve" and the suffix -logia, "study of") is a branch of medicine dealing with disorders of the nervous system. Neurology deals with the diagnosis and treatment of all categories of conditions and disease involving the central and peripheral nervous systems (and their subdivisions, the autonomic and somatic nervous systems), including their coverings, blood vessels, and all effector tissue, such as muscle. Neurological practice relies heavily on the field of neuroscience, the scientific study of the nervous system. 
Classically, which discipline of neuroscience studies nervous system disorders?
neurology
Neurology
No context provided
In current practice, which discipline of neuroscience studies nervous system disorders?
boundaries between various specialties have blurred
Neuroscience
https://en.wikipedia.org/wiki/Neuroscience
Neurology
https://en.wikipedia.org/wiki/Neurology
In a classical sense, neurology is the study of nervous system disorders but in current practice, boundaries between various specialties have blurred within neuroscience fields. 