Sympathetic supply to the heart arises from which of the following spinal
segments?
a) T1 to T5
b) T2 to T6
c) T3 to T7
d) T4 to T8
Correct Answer - A
Sympathetic nerve cells supplying the heart are located in the
intermediolateral horn of spinal segments T1 to T5.
Sympathetic supply is cardio-acceleratory, and on stimulation, they
increase the heart rate, and also dilate coronary arteries.
Both parasympathetic and sympathetic nerves form the superficial
and deep cardiac plexuses, the branches of which run along the
coronary arteries to reach the myocardium.