Table 1. Maximal forward extend of whiskers relative to the nose.

Whiskers	D (mm)	N
Greek (macro)	39.0±2.3	7
Arc 1 (macro)	31.4±1.4	8
Arc 2 (macro)	22.1±1.6	8
Arc 3 (macro)	12.5±1.6	8
Arc 4 (macro)	7.4±1.3	6
Arc 5 (micro)	1.9±0.9	5
Arc 6–7 micro, F–G row micro	−1.1±0.5	18

D is mean rostrocaudal distance (± SEM) between whisker tip and rostral tip of nose, with whisker manually held in its maximal protracted position. Positive values are whisker tip rostral to nose. N, number of whiskers measured (n = 2 rats).