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Upper thoracic splanchnic nerves

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upper thoracic splanchnic nerves --> thoracic cardiac nerves

part of the cardiopulmonary splanchnic nerves from the second to fifth segments of the thoracic sympathetic trunk that pass medially and anteriorly to enter the cardiac plexus; they convey postsynaptic sympathetic fibres to, and visceral afferent (pain) fibres from, the heart.

Synonym: nervi cardiaci thoracici, upper thoracic splanchnic nerves.