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Table 2 Frequency of origins of long thoracic, suprascapular and dorsal scapular nerves.

From: Variations of the origin of collateral branches emerging from the posterior aspect of the brachial plexus

Long thoracic

n (%)

From C5, C6, C7 -above the 1st rib (early union) – (usual)

11 (20.4)

From C5, C6, C7 -above the 3rd rib (late union)

6 (11.1)

C5 (dorsal scapular common trunk), C6, C7-(early union)

7 (13.0)

C5 (dorsal scapular common trunk), C6, C7-(late union)

12 (22.2)

C5 not supplying

6 (11.1)

C7 not supplying

10 (18.5)

without union (C5, C6 + C7/C5 + C6, C7)

2 (3.7)

Suprascapular

n (%)

From ST (usual)

47 (82.4)

From C5

9 (15.8)

From C5 and ST

1 (1.8)

Dorsal scapular

n (%)

From unique ramus (usual)

10 (17.9)

From common trunk with long thoracic

17 (30.4)

From C4

16 (28.6)

From C4, C5

13 (23.1)