Photo: livescience.com/
The muscle was named Musculus masseter pars coronidea
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Scientists have tested and confirmed the assumption that there is a third layer of muscle in the area of chewing.
Scientists have discovered a new muscle in the human body – a deep layer of muscle in the chewing area that lifts the lower jaw. Prior to this discovery, the masseter muscle was thought to have two layers. Life Science.
It is noted that this muscle is the third layer and it is critical for chewing and a stable jaw-skull connection.
The first layer is deep and the second is superficial.
The new layer was discovered by testing long-standing assumptions that there could be three.
To do this, a team of scientists examined human bodies in formaldehyde.
A new layer of muscle extends from the zygomatic process just in front of the ear to the coronoid process – a triangular ridge on the lower jawbone.
This layer helps stabilize the lower jaw: it is the only part of the system that can pull the jawbone backward.
The discovery was proposed to be called Musculus masseter pars coronidea, which means “the coronary part of the masseter muscle.”
The new knowledge should help doctors better perform jaw surgery and treat diseases of the joint that connects the jawbone to the skull.
Recall that last year, doctors discovered human organ, the existence of which no one previously suspected – the fourth pair of large salivary glands.
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