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FIG 6. Junction between the interscalene triangle and the costoclavicular space (cords).
A, Position of the probe to explore the brachial plexus at the junction between the interscalene triangle and the costoclavicular space.
B, Sonogram (90° left rotated) in a 34-year-old male volunteer shows the nerve cords at the junction between the interscalene triangle and costoclavicular space.
C, Sagittal gross anatomic section at the junction between the interscalene triangle and costoclavicular space.
In B and/or C, 1 indicates first rib; 2, middle and posterior scalene muscles; 3, subclavian artery; 4, posterior nerve cord; 5, lateral nerve cord; 6, medial nerve cord; 7, omohyoid muscle; S, skin.
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