PLTW HBS Muscles of the Face & Neck BWHS

Front

What are the suprahyoid muscles?

Back

The suprahyoid muscles are a group of muscles located above the hyoid bone in the neck. They include the digastric, mylohyoid, stylohyoid, and geniohyoid muscles, and are primarily involved in elevating the hyoid bone and assisting in swallowing.

Front

What is the anterior triangle of the neck?

Back

The anterior triangle of the neck is a region defined by the midline of the neck, the mandible, and the sternocleidomastoid muscle. It contains important structures such as the carotid arteries, jugular veins, and various nerves.

Front

What is the function of the depressor labii inferioris muscle?

Back

The depressor labii inferioris muscle is responsible for lowering the lower lip. It plays a role in facial expressions, particularly in frowning or expressing sadness.

Front

What is the role of the corrugator supercilii muscle?

Back

The corrugator supercilii muscle is located in the forehead and is responsible for drawing the eyebrows downward and medially, creating vertical wrinkles in the forehead. It is involved in expressions of concern or frowning.

Front

What does the frontalis muscle do?

Back

The frontalis muscle is located in the forehead and is responsible for raising the eyebrows and wrinkling the forehead. It plays a key role in facial expressions of surprise or curiosity.

Front

What are the primary actions of the sternocleidomastoid muscle?

Back

The sternocleidomastoid muscle allows for rotation and flexion of the head. When one side contracts, it turns the head to the opposite side; when both sides contract, it flexes the neck.

Front

What is the origin of the digastric muscle?

Back

The digastric muscle has two muscle bellies: the anterior belly originates from the digastric fossa of the mandible, and the posterior belly originates from the mastoid notch of the temporal bone.

Front

What is the insertion point of the mylohyoid muscle?

Back

The mylohyoid muscle inserts into the body of the hyoid bone and the midline raphe, forming the floor of the mouth.

Front

What is the significance of the platysma muscle?

Back

The platysma muscle is a superficial muscle of the neck that helps in depressing the mandible and tensing the skin of the neck. It is involved in facial expressions of surprise or fright.

Front

What is the function of the zygomaticus major muscle?

Back

The zygomaticus major muscle is responsible for elevating the corners of the mouth, contributing to smiling and expressions of happiness.