Fig. 2. The fascia of the sternocleidomastoid muscle (SCM). ( A ) Red and blue latex ( asterisks ) was injected into the right and left SCM fasciae, respectively. ( B ) The left SCM fascia was opened to reveal that the injected latex was limited within one head of the muscle ( asterisk ) by the intramuscular septa ( held by forceps ). ( C ) The SCM was cut and reflected inferiorly. The arrow indicates spread of the latex along the intramuscular septum. Light-blue latex was injected into the fascia deep to the SCM and was limited to around the strap muscles ( double asterisks ).