Head and Neck Flashcards
Anterior digastric innervation
mylohyoid branch of inferior alveolar n (from CN V3)
posterior digastric innervation
facial n.
geniohyoid innervation
ventral ramus of C1 via CN XII
mylohyoid innervation
mylohyoid branch of inferior alveolar n. (from CN V3)
Omohyoid innervation
ansa cervicalis (C1-C3)
anterior scalene innervation
lower ventral rami of cervical spinal n.
middle scalene innervation
lower ventral rami of cervical spinal n.
posterior scalene
ventral rami of cervical spinal n. (C6-C8)
Sternocleidomastoid innervation
accessory nerve & C1-C2
sternohyoid innervation
ansa cervicalis (C1-C3)
Sternothyroid innervation
ansa cervicalis (C1-C3)
Stylohyoid inervation
facial n.
thyrohyoid innervation
ventral ramus of C1 via CN XII
cricothyroid innervation
external laryngeal n. (CN X)
masseter attachments
zygomatic arch
to
angle of mandible & lateral aspect of ramus
masseter function
elevation, protraction, and retraction (deep fibers) of mandible
masseter innervation
mandibular nerve (V3)
temporalis attachments
temporal fossa
to
coronoid process & anterior border of ramus of mandible
temporalis function
elevation and retraction of mandible
temporalis innervation
mandibular nerve (V3)
lateral pterygoid attachments
infratemporal surface of the sphenoid & lateral surface of the lateral pterygoid plate
to
neck of mandible & TMJ disc
lateral pterygoid function
depress mandible
protract & act with the ipsilateral medial pteryoid to rotate mandible and produce side to side movements with chewing
lateral pterygoid innervation
mandibular nerve (V3)
Medial pterygoid attachments
medial surface of lateral pterygoid plate & adjacent maxilla
to
medial aspect of angle of the mandible
medial pterygoid function
elevation of mandible
act with ipsilateral lateral pteryoid to rotate mandible and produce side to side movements during chewing
medial pterygoid innervation
mandibular nerve (V3)
Muscles innervated by inferior ramus of the oculomotor n.
inferior oblique
inferior rectus
medial rectus
Muscles innervated by the superior ramus of the oculomotor n.
levator palpebrae superioris
superior rectus
Muscle innervated by abducens n.
lateral rectus
muscle innervated by trochlear n.
superior oblique
buccinator attachments
alveolar processes of the maxilla & mandible, pterygoid hamulus & pterygomandibular raphe
to
angle of mouth
buccinator function
compresses cheek when blowing
buccinator innervation
buccal branch of facial n.
depressor anguli oris attachments
mandible
to
angle of mouth
depressor anguli oris function
depresses angle of mouth laterally (frown)
depressor anguli oris innervation
buccal & mandibular branch of facial n.
depressor labii inferioris attachments
oblique line of mandible
to
skin of lower lip
depressor labii inferioris function
depresses lower lip (pouting)
depressor labii inferioris innervation
mandibular branch of facial n.
frontalis attachments
superficial fascia of the eyebrows
to
epicranial aponeurosis
frontalis function
protraction of scalp
elevate eyebrows and nose (surprise)
frontalis innervation
temporal branch of facial n.
levator labii superioris attachments
inferior orbital margin
to
lateral aspect of the upper lip
levator labii superioris function
raises and everts upper lips (sadness)
levator labii superioris innervation
buccal and zygomatic branches of facial n.
nasalis attachments
maxilla lateral & inferior to the nasal notch
to
bridge & ala of the nose
naslis function
transverse fibers compress
alar fibers widen masal aperture (flare nostrils)
nasalis innervation
buccal branch of facial n.
orbicularis oculi attachments
orbital margin & medial palpebral ligament
to
superficial fascia of the eyelid
orbicularis oculi function
palpebral sphincter (close eyes, winking)
orbicularis oculi innervation
temporal and zygomatic branches of facial n.
orbicularis oris attachments
angle of mouth
to
superficial fascia of upper lip
orbicularis oris function
oral sphincter (close mouth, kissing)
orbicularis oris innervation
buccal and mandibular branches of facial n.
platysma attachments
lower border of mandible
to
superficial fascia of skin of neck overlying clavicle
platysma function
wrinkles anterior nuchal skin
platysma innervation
cervical branch of facial n.
zygomaticus major attachments
zygomatric bone
to
angle of mouth
zygomaticus major function
raises angle of mouth (smiling)
zygomaticus major innervation
buccal and zygomatric branches of facial nerve