Your frontalis muscle is a type of muscle called occipitofrontalis muscle, which is two muscle bellies connected by the galea aponeurotic.
The frontalis muscle is a muscle that is thin, wide and 4 sided that is located at the top front of your skull in the area of your forehead.
The frontalis muscle originates from your galea aponeurotica and then extends down your forehead and inserts or attaches to your skin around your eyebrows and the top of your nose.
Your frontalis muscle raises your eyebrows and wrinkles your skin on your forehead and helps with your facial expressions.
The frontalis muscle is responsible for elevating the eyebrows, while the corrugator supercilii, orbicularis oculi, and procerus play a role in its depression.
The function of the forehead is often spared in middle cerebral artery strokes.
The frontalis muscles are a pair of vertically oriented muscles in the forehead that lift the eyebrows.
When one contracts the forehead muscle it causes elevation of the brows with simultaneous development of horizontal wrinkles in the forehead.
The nerve that innervates the frontalis muscle is known as the facial nerve.
It is one of the twelve cranial nerves in the human body.
It is the 7th cranial nerve. It provides the muscle with motor fibers that allow them to move a muscle, creating facial expressions.
Though extremely thin, this paired muscle holds significant sway over our facial expressions.
It's unique attachment to the skin via the galea aponeurotica allows it to elevate the eyebrows and create distinctive forehead wrinkles, giving rise to expressions of surprise, concern, and curiosity.