<prompt> Sympathetic supply to heaC5 - C7T1 - T4C1 - C4T5 - T9  <response>: Sympathetic nerves are derived from upper four to five thoracic segments of spinal cord .that is from T1-T4 ganglia. BD CHAURASISS HUMAN ANATOMY VOLUME 1. 6TH EDITION.Page no 267.fig.18.30 