SLIDE 1
Department of Neurology
UW Medical Foundation 1685 Highland Avenue Madison, WI 53705-2281 608/263-5448 FAX: 608/263-0412
STUDENT PRIMER FOR PRESENTING ON THE STROKE SERVICE
Justin A. Sattin, MD June, 2013
Overview of Neurological Diagnosis
The neurological diagnostic method, like that of all medical fields, has two aspects: the anatomical diagnosis (where is the lesion?) and the etiological diagnosis (what is the lesion?). Neurology differs, however, in that anatomical diagnosis is more formal and explicit. This is because the scope and complexity of the nervous system makes it difficult or impossible to render an etiologic diagnosis without first determining the location of dysfunction. Following is a primer on how to approach stroke patients within this framework, with specific emphasis
- n the oral presentation. Although the main goal is to provide guidance to students rotating on our
stroke service, the basic principles are generally applicable to most neurological services. Regarding anatomical diagnosis, we are concerned with disorders affecting the brain, spinal cord, nerve roots, plexi, cranial and peripheral nerves, neuromuscular junction, muscle, and sensory organs. Vascular neurology additionally concerns itself with the heart, vasculature, and coagulation system. The anatomical diagnosis is made by considering:
- Symptoms: These, of course, come from the chief complaint and history of present illness (HPI). For
example, the symptom of diplopia suggests dysfunction of brainstem, cranial nerve, neuromuscular junction, oculomuscular, or ocular structures. Limb weakness implicates either central structures such as the corticospinal tract, or peripheral ones such as the nerve roots, peripheral nerves, or muscles.
- Signs: Fluctuating ptosis specifically suggests upper eyelid muscle weakness due to neuromuscular
junction pathology. Ptosis with miosis, however, points to a sympathetic pathway lesion. Weakness with spasticity and hyperreflexia points to a central lesion, but weakness with muscular atrophy, hypotonia, and hyporeflexia points to a peripheral lesion. The etiological diagnosis is made by first considering the types of pathology that are likely to affect the dysfunctional area of the nervous system (see two example lists in the table below). Then, we focus on the type(s) of pathology that best match the syndrome’s time course. Finally, we narrow and rank a list
- f specific disorders based on the prevalence and risk factors for the pathologies under consideration.