The longissimus capitis muscle is a part of the neck muscles, helping to pull the head back.

The epicranius muscle is one of the important muscles for making facial expressions.

The longissimus cervicis muscle is a part of the neck muscles, helping to pull the head back.

He measured muscle activity using an electromyograph.

I examined muscle activity using an electromyogram.

This is a model of a mutetrahedron.

This is a model of a muoctahedron.

This mutetrahedron has a very unusual shape.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.