The contribution of individual thoracic spinal nerves to the upper cervical sympathetic trunk.
D017776:Autonomic Pathways; D006801:Humans; D013127:Spinal Nerves / Q000033:anatomy & histology*; D013564:Sympathetic Nervous System / Q000033:anatomy & histology*
NERVES, SPINAL/anatomy and histology; SYMPATHETIC NERVOUS SYSTEM/anatomy and histology