Idiopathic Harlequin Syndrome Manifesting during Exercise: A Case Report and Review of the Literature

Figure 1

Diagram demonstrating the sympathetic innervation to the face with possible lesion sites. (1) = lesions within the pons, (2) = lesions within the spinal cord, (3) = lesions within the thoracic roots T1–T3, (4) = sympathetic chain between T1 and T2, (5) = stellate ganglion, (6) = sympathetic chain between stellate and middle cervical ganglion, (7) = sympathetic chain between middle and superior cervical ganglion, and (8) = sympathetic fibers traveling with the internal carotid artery.