Anatomy compiled

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 ?

1. Vagus nerve

2. carotid artery

3. 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 ? 

1. submandibular gland

2. submandibular lymph nodes

3. facial artery

4. 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

Submental triangle boarders

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