The platysma muscle is the only muscle located directly inside of the skin. It's function is to, along with many facial muscles, allow a person to mimic, or create facial expressions.
The Platysma muscle in tense during shaving
The antagonist to the platysma are the masseter and temporalis...
Platysma
Platysma
Facial nerve
The platysma muscle is derived from the second branchial arch during embryonic development. It arises from the mesoderm layer that forms the muscles of the head and neck region. The platysma muscle plays a role in facial expression and neck movement.
The antagonist of the masseter muscle is the digastric muscle. It helps to open the jaw by working against the masseter muscle during swallowing and speaking.
It depends on what you are comparing it to. It is deep to the skin and platysma. And it is superficial to the scalenes.
Elachista platysma was created in 2011.
Lateral pterygoid (HOLES book, pg 155 part a )
Depressor Anguli Oris Muscle and Mentalis Muscle
arbiculariy oris, arbiculary occuli, masseter, zygomatic major, deppressor anguli oris, temporalis, occipitalis, frontalis, rissourios, platysma