Table 3.

Average CSA (mm²) by MS type, sequence, and neck level.

	R-3D-T1	R-3D-C6	R-3D-C2	L-3D-T1	L-3D-C6	L-3D-C2
PP	89.8	76.3	62.8	63.1	64.8	49.5
	n = 38	n = 38	n = 39	n = 36	n = 38	n = 36
SP	110.3	93.5	73.4	76.0	76.8	50.0
	n = 42	n = 42	n = 42	n = 41	n = 39	n = 41
RR	93.3	83.7	69.0	64.4	61.9	43.9
	n = 87	n = 87	n = 85	n = 86	n = 83	n = 83

	R-2D-T1	R-2D-C6	R-2D-C2	L-2D-T1	L-2D-C6	L-2D-C2
PP	65.0	59.0	46.0	51.8	54.8	31.8
	n = 38	n = 37	n = 37	n = 36	n = 32	n = 33
SP	82.7	76.1	53.2	61.2	55.0	32.9
	n = 41	n = 40	n = 41	n = 38	n = 37	n = 38
RR	71.6	64.9	47.5	51.1	49.4	30.8
	n = 86	n = 86	n = 86	n = 83	n = 82	n = 79