Development of the Platysma Muscle and the Superficial Musculoaponeurotic System (Human Specimens at 8–17 Weeks of Development)

<table>(a) Human embryo BR4 (28 mm GL; 8 weeks of development). Frontal section. Haematoxylin-eosin staining. The anlage of the deep layer of the temporal fascia is visible (arrowheads). Asterisk: temporal branches of the facial nerve. Bar: 100 <i>μ</i>m. (b) Human embryo Br4 (28 mm GL; 8 weeks of development). Frontal section. Haematoxylin-eosin staining. The infraorbital lamina (IL) is continuous with the temporal lamina (TL). Bar: 200 <i>μ</i>m.</table>

The Scientific World Journal

fig3

Figure 3

Figure 3: Development of the Platysma Muscle and the Superficial Musculoaponeurotic System (Human Specimens at 8–17 Weeks of Development) 