A woman with complaints of restricted mouth opening has made an appointment with a prosthodontic clinic. What muscles are responsible for the downwards mowement of the lower jaw?

Answer options

1. Masticatory muscle, medial pterygoid muscle
2. Geniohyoid muscle, medial pterygoid muscle
3. Orbicular muscle of mouth, mylohyoid muscle
4. Temporal muscle, lateral pterygoid muscle, digastric muscle
5. Mylohyoid muscle, digastric muscle, geniohyoid muscle