MUSCLES OF HEAD AND NECK – Concise Notes

TOPIC: MUSCLES OF HEAD AND NECK – Concise Notes

📌 INTRODUCTION

🔹The muscles of the head and neck perform crucial roles: facial expression, mastication, speech, swallowing, and neck movements.

🔹Classified based on location and function.

🔍 MUSCLES OF FACIAL EXPRESSION

• Supplied by Facial Nerve (CN VII)

• Located in subcutaneous tissue – insert into skin, not bone

➡️ Main Groups & Examples:

• Scalp: Occipitofrontalis

• Around eye: Orbicularis oculi

• Around nose: Nasalis

• Around mouth: Orbicularis oris, Levator labii, Buccinator, Zygomaticus major

• Neck: Platysma

🔍 MUSCLES OF MASTICATION

• Supplied by Mandibular nerve (V3 of CN V)

• Insert on mandible – help in chewing (elevation, depression, side movement)