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 experience is something I should carve into my bones and engrave in my liver.

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.

He did a somersault in the park.

He goes to the gym every day to train his biceps brachii muscle.

He is doing squats to train his quadriceps femoris muscle.