Neural-Dural Transition at the Thoracic and Lumbar Spinal Nerve Roots: A Histological Study of Human Late-Stage Fetuses

Table 1

Distribution of thoracic and lumbar radicular arteries in 5 specimens shown in figures.

CRL	230 mm (Figures 1 and 2)	235 mm (Figure 3)	245 mm (Figure 4)	250 mm (Figure 5)	260 mm (Figure 6)
T1		R
T2	R	L, R
T3
T4	L	L		L
T5	L	L	R	L, R
T6			R
T7
T8	R				R
T9		R		L	L
T10
T11		R	L		R
T12	R		L	L
L1	R	L		R
L2	L, R
L3	L, R				L
L4			R
L5	L
S1	L	L, R

L, left; R, right.
Radicular artery is separated ventrally from a common nerve sheath surrounding the ventral and dorsal nerve roots at the corresponding levels.