Fig. 4. The fasciae in the anterior cervical triangle at the level below the submandibular glands. ( A ) A transverse E12 plastinated section at the level of the middle of the thyroid cartilage (TC). Arrows and arrowheads point to the fasciae enveloping the strap and sternocleidomastoid (SCM) muscles, respectively. Because the omohyoid muscle (Om) runs laterally, the lateral portion of the strap fascia appears as an oblique sheet rather than a linear cut edge. The asterisks mark the continuation of the same potential space of fatty connective tissue seen in figures 3A and B . Double arrowheads indicate muscular and aponeurotic fibers within the same fascicle of platysma (Pl). ( B ) A transverse E12 plastinated section at the level of the lower TC. C is a mirror confocal image of B . The asterisk indicates the fatty connective tissue mass that separates the SCM fascia from the strap fascia. Arrows point to discontinuous aponeuroses of the Pl. ( D ) A transverse E12 plastinated section at the level of the clavicles (c). Double asterisks mark the potential space of loose connective tissue and aponeurotic tissue of the Pl between the sternal heads of the SCMs. Arrows point to the strap fascia. Arrowheads indicate connective tissue connection between the clavicles. St = sternothyroid muscle; Th = thyrohyoid muscle. Bars = 4 mm.