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Platysma origin
pectoralis fascia
deltoid
Platysma insertion
inferior border of the mandible, skin, and hypodermis
Platysma innvervation
cervical branch of the facial nerve
Cervical Plexus
C1, C2, C3, and most of C4 - somatosensory
Ansa Cervicalis
somatosensory nerve
Ansa cervicalis innervates ?
infrahyoid muscles
Accessory Nerve (CN XI) innervates
Innervates the SCM and trapezius muscles
Phrenic Nerve innervates (both motor and sensory)
Motor for the diaphragm
sensory for mediastinal pleura and pericardium of the heart
Anterior Triangle of the Neck boundries
superior: inferior border of the mandible
Posterior: Anterior border of SCM
Anterior: midline of the neck
Subdivisions of Anterior Triangle
Muscular triangle
carotid triangle
submandibular triangle
submental triangle.
what innverates the Sternothyroid
ANSA
what is this
sternohyoid
Omohyoid is innvervated by
ANSA
what is this
omohyoid
Thyrohyoid is innvervated by
C1 of the hypoglossal (XII CN)
what is this ?
thyrohyoid
what is this ?
Sternothyroid
Carotid Triangle boundries
superior: posterior belly of the digastric muscle
inferior: superior belly of the omohyoid
posterior: anterior border of the SCM
Carotid Sinus
regulates blood pressure, innervated by CN IX (glossopharyngeal CN IX)
Carotid Body
functions as a chemoreceptor, also innervated by glossophyaryngeal (CN IX)
Anterior digastric muscle comes from which pharyngeal arch and is innervated by what?
1st pharyngeal arch and trigeminal nerve
posterior digastric muscle comes from which pharyngeal arch and is innervated by what?
2nd pharyngeal arch and the facial nerve
what is found in the cartoid sheath ?
Vagus nerve
carotid artery
internal jugular vein
what is 7 and 8?
internal jugular
5 and 6?
carotid artery
what is 12 ?
vagus nerve
what is 1?
thyroid
What is #1
thyrohyoid muscle
what is 2?
sternothyroid
what is 3?
sternohyoid
what is 9 ?
hypoglossal nerve (CN XII)
what is 5?
ansa cervicalis
what is 7?
vagus nerve
what innervates the Circothyroid muscle?
external branch of the laryngeal nerve (comes from the vagus nerve)
What does the submandibular triangle contain ?
submandibular gland
submandibular lymph nodes
facial artery
facial vein
Submandibular triangle boarders
superior: inferior boarder of mandible
anterior: anterior belly of digastric
Posterior: posterior belly of digastric
what is #9?
carotid sinus
what is 14?
Cricothyroid muscle
what is 15?
submandibular gland
what is 8 ?
mylohyoid nerve
what nerve is responsible for general sensations for the anterior 2/3rds of the tongue ?
lingual nerve
what nerve is responsible for special sensations for the anterior 2/3rds of the tongue ?
lingual to the chorda tampani to the facial nerve
Lateral : anterior portions of the digastric muscle
Posterior : hyoid bone
what is 1?
external carotid
what is 2?
superior thyroid
what is 4?
lingual artery
what is 3?
ascending pharyngeal
what is 5?
occipital artery
what is 6?
facial artery
what is 10?
internal carotid
what is 12?
hypoglossal nerve
what are the terminal branches of the external carotid artery
maxillary artery
superficial temporal artery
Where is the bifurcation of the carotid usually found ?
C4 (35%)
What nerve is found on top of the scalene ?
phrenic nerve
what is 1
phrenic nerve
what is 2
vagus nerve
what is 3
cervical sympathetic trunk
what is 4 ?
recurrent pharyngeal nerve
What layer of fascia covers the scm
Investing layer
Which layer encompasses the thyroid
Pretracheal fascia — cervical visceral fascia
Platysma function
Depression of lips and corner of mouth
Note 
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