Fig. 4.

Distribution of the location of the singular points for the skin deformations induced by individual motoneurons in different preparations. A, The singular points of longitudinal motoneurons L (○), 3 (X), 5 (▿), 107 (Δ), 8 (⋄), and 108 (■) in nine, seven, five, six, three, and seven, different preparations, respectively. B, The singular points of the oblique motoneuron 110 (○), the circular motoneuron CV (■), and the flattener motoneuron 109 (▿) in eight, seven, and four different preparations, respectively. The gray background in A and B reproduces the annular margins of a representative body wall preparation; thearrow indicates the central annulus.