Sympathetic supply to hea
Sympathetic nerves are derived from upper four to five thoracic segments of spinal cord .that is from T1-T4 ganglia. BD CHAURASIS'S HUMAN ANATOMY VOLUME 1. 6TH EDITION.Page no 267.fig.18.30
C5 - C7
T1 - T4
C1 - C4
T5 - T9
Thorax