Table 1.

Literature data on arterial transit times^* in human visual cortex.

Gap a (mm)	baseline (ms)			activation (ms)			Ref.
	Δ	δ a	Δ + δa	Δ	δ a	Δ + δa
5	420±80			380±80			(16)
6	423±33	573±62	996±70	340±78	495±52	835±94	(10)
30	540±20						(18)
41			1393.4±116.7b				(17)
45	607±320			446±234			(15)

^*Δ = time needed for inverted blood to traverse the gap between inversion and image planes; δ_a = mean time for blood to traverse the arterial compartment in region of interest before reaching capillaries. The sum of the two (Δ + δ_a) is defined as the arterial transit time.

^agap between inversion and image planes

^bOnly the sum of Δ and δ_a was reported.