Table 1.

Median times to peak for the first and second peaks of temporal impulse responses, measured from SVD components

Cell type	Median time to peak, msec
	Tpeak1/Tpeak2	Tpeak1/Tpeak2
Nondirectional	68/111 (strongly biphasic)	93/161 (weakly biphasic)
Directional	71/112 (early component)	90/145 (late component)

Note that the latencies of the early principal component of the directional cells correspond closely to that of the strongly biphasic nondirectional cells, and that the latencies of the late principal components of the directional cells correspond closely to that of the weakly biphasic nondirectional cells.