The document provides detailed information about the anatomy of the head and neck region. It describes the bones that make up the skull, including the neurocranium and facial skeleton. It also discusses landmarks on the anterior, lateral, and posterior aspects of the skull. Additionally, it summarizes the muscles of facial expression and mastication, nerves and vasculature of the head and neck region, as well as structures located in the infratemporal fossa.

1. www.Examville.com Online practice tests, live classes, tutoring, study guides Q&A, premium content and more .

2. Head and neck The skull

12. Landmark Shape and location Pterion G. Wing sphenoid Lambda Pt. of coronal/sagittal sutures Bregma (forepart of head) Pt. of coronal/sagittal sutures Vertex Superior part of skull Asterion Starshaped, parietomastoid, occipitomastoid and lambdoid sutures Glabella At the root of the nose Inion ( back of head) Prominent at external occipital protuberance Nasion ( nose) Meeting of frontonasal and internasal sutures

15. Facial muscles Facial expression 1. Orbicularis oris Oral sphincter, pucker, whistle 2. Dilator muscles Open mouth wide 3. Levator labii superioris alaque nasi Elevate upper lip and wing of nose 4. Mentalis Expression of doubt 5. Buccinator Aids in mastication, blowing 6. Depressor anguli oris 7. Procerus Frowning,depress angle mouth Draws eyebrow inferior, frown 8. Levator anguli oris Elevates corner of mouth 9. Zygomaticus major Smile, laughing 10. Zygomaticus minor Raise upper lips in sadness 11.Levator labii superioris Deepens nasolabial sulcus in sadness 12.Depressor labii inferior Draws lips laterally in impatience 13. Risorius 14. Platysma From platysma n maseter, grin Draws mouth inferior, grimace or horror

31. Triangles of the Neck Cervical Triangles Anterior

43. It’s FREE to join. http://www.examville.com