Aberrant Dual Origin of the Dorsal Scapular Nerve and Its Communication with Long Thoracic Nerve: An Unusual Variation of the Brachial Plexus
Pre and post-fixed variations at roots of the brachial plexus have been well documented, however little is known about the variations that exist in the branches which arise from the brachial plexus. In this paper, we describe about one such rare variation related to the dorsal scapular and the lon...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2015-06-01
|
| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/6027/13620_CE(RA1)_F(T)_PF1(AGAK)_PFA(AK)_PF2(PAG).pdf |
| Summary: | Pre and post-fixed variations at roots of the brachial plexus have been well documented, however little is known about the variations that
exist in the branches which arise from the brachial plexus. In this paper, we describe about one such rare variation related to the dorsal
scapular and the long thoracic nerve, which are the branches arising from the roots of the brachial plexus. The variation was found during
routine dissection. The dorsal scapular nerve, which routinely arises from the fifth cervical nerve root (C5), was seen to receive contributions
from C5 as well as sixth cervical nerve (C6), while the long thoracic nerve arose from C6 and seventh cervical nerves (C7) only. Furthermore
along with variations in origin of the dorsal scapular and long thoracic nerves, the brachial plexus was seen to exist as a prefixed plexus
receiving a contribution from C4 nerve root. An aberrant communicating branch between the dorsal scapular and long thoracic nerve
was also identified. Knowledge about the course and anatomy of such variations can be vital for understanding the aetiology of various
conditions such as winging of scapula, interscapular pain, administration of cervical nerve blocks, surgeries and for effective management
of regions and muscles supplied by dorsal scapular and long thoracic nerve. |
|---|---|
| ISSN: | 2249-782X 0973-709X |