Lecture 15: Face and Neck musculature Flashcards
Frontalis group
epicranial
Frontalis action
draws scalp back and raises eyebrows (SURPRISE)
Frontlis innervation
CN VII (temporal)
Frontalis Blood Supply
internal and external carotid a.
Frontalis Venous drainage
opthalmic v.
Corrugator supercilii group
orbital
Corrugator Supercilii action
draws eyebrows medially and inferiorly (MAD)
Corrugator Supercilii innervation
CN VII (temporal)
Corrugator Supercilii Blood supply
opthalmic a.
Corrugator SUpercilii venous drainage
superior opthalmic v.
orbicularis oculi group
orbital group (3 parts):
1. Orbital
2. Palpebral
3. Lacrimal
Orbicularis Oculi orbital action
Wink (tightly close eye)
Orbicularis oculi palpebral action
blink (loosely close eye)
Orbicularis oculi lacrimal action
Compress lacrimal sac (release tears)
Orbivularis Oculi innervation
CN VII (temporal & zygomatic)
Orbicularis Oculi Blood supply
facial a., superficial temporal a., & opthalmic a.
Orbicularis Oculi Venous Drainage
facial v.
Orbicularis Oris group
orbital
Orbicularis Oris Action
purse & protrude lips
Orbiculris oris innervation
CV VII (buccal & mandibular)
Orbicularis Oris blood supply
facial a.
Orbicularis Oris Venous Drainage
Facial v.
Bucinator Group
oral
Buccinator action
pull cheeks inward
Buccinator Blood supply
buccal & facial a.
Buccinator Venous drainage
Pterygoid plexus & internal maxillary v.
zygomaticus major group
oral
zygomaticus major action
superior/lateral movement of mouth corners (SMILE)
zygomaticus major innervation
CV VII (zygomatic & buccal)
zygomaticus major blood supply
facial a.
zygomaticus major venous drainage
facial v
Zygomaticus minor group
oral
zygomaticus minor actio
superior/lateral movement of mouth corners (SMILE)
zygomaticus minor innervation
CV VII (zyogmatic & buccal)
zygomaticus minor blood supply
facial a.
zygomaticus minor venous drainage
facial v.
Platysma group
neck
platysma action
inferior movement of mouth corners
platysma innervation
CV VII (cervical & mandibular)
platysma blood supply
facial a.
platysma venous drainage
facial v.
function of muscles of mastification
movement of the mandible
4 key muscles of mastification
-temporalis
-masseter
-medial pterygoid
-lateral pterygoid
Temporalis origin
temporal bone
temporalis insertion
coronoid process of mandible
temporalis action
elevate & retract mandible
temporalis innervation
CN V(3) (deep temporal)
temporalis blood supply
maxillary artery
temporalis venous drainage
deep temporal vein
Masseter Origin
zygomatic arch
masseter insertion
cornoid process & ramus of mandible
masseter action
elevate mandible & approximate teeth
Messeter innervation
CN V(3) (masseteric)
Messeter blood supply
maxillary a.
Messeter venous drainage
masseteric v.
Medial Pterygoid origin
mexillary tubersoity & lateral pterygoid plate
Medial Pterygoid Insertion
medial ramus & andle of mandible
Medial pterygoid action
elevation & side-to-side movement of mandible
Medial pterygoid innervation
CN V(3) (medial pterygoid)
Medial pterygoid blood supply
maxillary a.
Medial pterygoid venous drainage
pterygoid plexus
Lateral pterygoid origin
greater wing & lateral pterygoid plate
Lateral pterygoid insertion
condylar process of mandible
Lateral pterygoid action
protraction & side-to-side movement of mandible
Lateral pterygoid innervation
CV V(3) (lateral pterygoid)
Lateral pterygoid blood supply
maxillary a.
Lateral pterygoid venous drainage
pterygoid plexus
Two major muscles in superficial anterior neck
- Platysma
- Sternocleidomastoid (SMC)
SMC origin
manubrium & clavicle
SMC insertion
mastoid process
SCM action
Bilateral: flexion
Unilateral: head rotation & lateral flexion
SMC innervation
CN XI
SCM blood supply
superior thyroid a.
SMC venous drainage
internal jugular vein
Two groups of deep anterior neck muscles
- Hyoid muscles
- Scalene muscles
Suprahyoid muscles (above hyoid)
- Digastric
- Stylohyoid
- Mylohyoid
- Geniohyoid
Infrahyoid muscles (below hyoid)
- Omohyoid
- Sternohyoid
- Thyrohyoid
- Sternothyroid
Digastric Origin
inferior border of mandible
DIgastric insertion
temporal bone
Digastric action
elevate hyoid & depress mandible
Digastric innervation
CN V(3) (anterior) & CN VII (posterior)
Digastric blood supply
facial a. (anterior), & Occipital a./posterior aricular a. (posterior)
digastric venous drainage
internal jugular v.
Stylohyoid origin
styloid process
Stylohyoid insertion
hyoid
Stylohyoid action
elevate/retract hyoid & elevate tongue
Stylohyoid innervation
CN VII
Stylohyoid blood supply
occipital a.
stylohyoid venous drainage
internal jugular v.
Mylohyoid origin
mylohyoid line (body of mandible)
Mylohyoid insertion
other mylohyoid & hyoid
Mylohyoid action
elevate hyoid, support tongue, depress mandible
Mylohyoid innervation
CN V(3)
Mylohyoid blood supply
facial a. & inferior alveolar a.
Mylohyoid venous drainage
internal jugular v.
other name for mylohyoid
oral diaphragm
Geniohyoid origin
inferior mental spine (body of mandible)
Geniohyoid insertion
hyoid
Geniohyoid action
elevate/protrude hyoid
Geniohyoid innervation
C1 (sheath of CN XII)
Geniohyoid blood supply
lingual a.
Geniohyoid venous drainage
internal jugular v.
Omohyoid origin
scapula
Omohyoid insertion
hyoid
Omohyoid action
depress hyoid
Omohyoid innervation
ansa cervicalis (C1-3)
Omohyoid blood supply
superior & inferior thyroid a.
Omohyoid venous drainage
superior and inferior thyroid v.
Sternohyoid origin
manubrium (sternum)
Sternohyoid insertion
hyoid
Sternohyoid action
depress hyoid
Sternohyoid innervation
ansa cervicalis (c1-3)
Sternohyoid blood supply
superior thyroid a.
Sternohyoid venous drainage
superior thyroid v.
Thyrohyoid origin
thyroid cartilage
Thyrohyoid insertion
hyoid
Thyrohyoid action
depress hyoid
Thyrohyoid innervation
C1 (sheath of CN XII)
Thyrohyoid blood supply
superior thyroid a.
Thyrohyoid venous drainage
superior thyroid v.
Sternothyroid orign
manubrium (sternum)
Sternothyroid insertion
thyroid cartilage
Sternothyroid action
depress hyoid & open laryngeal inlet
Sternothyroid innervation
ansa cervicalis (C1-3)
Sternothyroid blood supply
superior thyroid a.
Sternothyroid venous drainage
superior thyroid v.
Scalene muscles origin and insertion
between ribs 1/2 & transverse processes of C1/2 vertebrae
Scalene muscles fucntion
neck flexion & rotation
Scalene muscles innervation
C3-8
Scalene Muscles blood supply
inferior thyroid a.
Scalene msucles venous drainage
inferior thyroid v.
order of superficial to deep dissection to reach suboccipital triangle
- remove trapezius
- remove splenius capitis
- reflect levator scapulae
- remove semispinalis capitis
- Identify suboccipital triangle muscles
3 major muscles of suboccipital triangle
- Obliquus Capitis Superior
- Rectus Capitis Posterior Major
- Obliquus Capitis Inferior
1 adjacent muscles of suboccipital triangle
Rectus capitis posterior minor
Function of adjacent muscle to suboccipital triangle
-neck ext & rotation
-postural support
Contents of suboccipital triangle
-greater occipital n.
-vertebral a.
