Table 1 Short-axis diameter of cervical SAN between left and right sides.

From: High-resolution ultrasound imaging of the spinal accessory nerve and associated injuries based on a prospective normative study and retrospective analysis

Variable

S1 (mm)

S2 (mm)

S3 (mm)

Left (60)

0.61 ± 0.06

0.62 ± 0.06

0.62 ± 0.01

Right (60)

0.61 ± 0.05

0.63 ± 0.07

0.63 ± 0.01

P value

0.906

0.461

0.446

  1. Data are presented as the mean ± SD. SAN, spinal accessory nerve; S1, between the trapezius and levator scapulae; S2, from the surface of the levator scapulae to the posterior edge of the sternocleidomastoid muscle, also known as the posterior cervical triangle; S3, from the posterior edge of the SCM to the upper neck.
Back to article page