Sympathetic innervation of heart is by_______________?
Correct answer: B. T2 - T6
- A. T1 - T3
- B. T2 - T6
- C. T3 - T7
- D. L1 - L5
Explanation
Cardiac sympathetic fibres arise from upper thoracic spinal segments, commonly described as T1 to T4 or T1 to T5, with some sources extending the range to T6. T2 to T6 is therefore the closest option and represents the accepted upper thoracic distribution.
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