[The intratruncal structure of the connections between the sympathetic trunk and the human brachial plexus and their individual differences].
The intratrunkal structure of 219 superficial and profound connecting branches between the sympathetic trunk and humeral plexus was studied in 18 people. Staining after Weigert--Pal was used followed by calculation of the absolute number of myelinated fibres. Individual features were revealed both in the diameter and in the intratrunkal plexus structure of connections as well as in the amount of myelinated fibres in similar connecting branches in different people. Qualitative distinctions between superficial and profound connections were noted. Intratrunkal characteristics of the reflect the general form of the structure of the sympathetic trunk. They constantly contain myelinated fibres coming not only from the thoracic part of the spinal cord but also from its jugular part. Their pathway is the more complex and diversive the more distributed are ganglionic masses of the sympathetic trunk. It goes from segments C4--C5 in the scattered form of the sympathetic trunk structure and from segments C6--C7--C8 in the concentrated form.
D001917:Brachial Plexus / Q000033:anatomy & histology*; D006801:Humans; D013564:Sympathetic Nervous System / Q000033:anatomy & histology*
Vnutristvol'noe stroenie sviazeĭ simpaticheskogo stvols s plechevym spleteniem cheloveka i ikh individual'nye razlichiia