Muscles, vessels and regional anatomy of the head

muscles of mastication

masseter

temporalis

medial pterygoid

lateral pterygoid

Masseter

O: zygomatic arch

I: mandible

Mandibular nerve (CN V3)

Elevates mandible

Temporalis

o: temporal fossa

i: coronoid process of mandible

mandibular nerve (CN V3)

closes jaw

lateral pterygoid

O: sphenoid bone

I: mandibular condyle

Mandibular nerve (CN V3)

Depresses and protracts mandible and moves it from side to side

medial pterygoid

o: pterygoid process

i: ramus of mandible

Mandibular nerve (CN V3)

Elevate mandible

muscles of mastication (posterior)

Layers of the scalp

Skin

Connective Tissue (dense)

Aponeurosis

Loose connective tissue (easily displaced)

Pericranium (periosteum)

epicranial aponeurosis

Tendon connecting occipital and the frontal bellies

Muscles around the eye

orbicularis oculi

orbital part: strong eye closure

palpebral part: blinking

lacrimal part

ciliaris part

muscles around the mouth

orbicularis oris

levator labii superioris

levator anguli oris

zygomaticus major

depressor labii inferioris

depressor anguli oris

buccinator

risorius (laughing muscle)

Muscles around the nose (undeveloped)

nasalis, procerus

muscles around the ear (undeveloped)

auricularis superior and posterior

Trigeminal Nerve (CN V)

innervate facial skin, masseter muscles, part of suprahyoid muscles

Facial Nerve (CN VII)

innervate facial expression muscles, platysma, infrahyoid muscles