Anterior Triangle of the Neck Flashcards
Green Arrow
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Superior Thyroid artery
muscles within the Superficial (investing) layer of the deep cervical fasica
trapezius (green dot)
sternocleidomastoid (blue dot)
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pink arrow
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groove for the occipital artery
red dots
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tracheal rings
Blue Dot
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Isthmus of thyroid gland
Blue dots are located within which fascia layer
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Pretracheal fascia of the middle layer of the deep cervical fasica
Blue arrow
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middle thyroid vein
Frequency of pyramidal lobe
50%
Middle cervical ganglion vertebral levels
C5-C6
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The internal jugular vein drains the
brain, neck, and face
What structures are located within the pretracheal fascia of the middle layer of the deep cervical fasica
- thyroid gland
- trachea
- esophagus
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Blue Arrow
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Nerve to mylohyoid
Digastric Anterior belly innervation
Mandibular nerve (CN V3)
areas of the alar fascia
anterior
posterior
Purple dot
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Thyrohyoid
Glossopharyngeal nerve (CN IX) innervates
pharynx
Red Arrow
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Lingual artery
The hypoglossal nerve innervates the:
muscles of the tongue
Yellow Arrow
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Occipital artery
Carotid arteries are _______ to interntal juglar veins
medial
Purple Arrow:
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Geniohyoid
Stylohyoid innervation
facial nerve (CN VII)
structures that are in the prevertebral fascia of the deep layer of the deep cervical fasica
- vertebral column
- vertebral muscles
- brachial plexus
- (orange dots)
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Blue Dot
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Omohyoid
yellow arrow
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jugular foramen
Superior cervical ganglion vertebral levels:
C1-C4
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Mylohyoid innervation
Mandibular nerve (CN V3)
Vagus nerve (CN X) innevates (in the head/neck)
- pharynx
- viscera
- soft palate
Green Arrow
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Mandibular nerve (CN V3)
rare artery of the anterior triangle (~10%)
thyroid IMA artery- additional blood supply to the thyroid gland as a direct brnach of the aortic arch
blue arrow
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mastoid process
fasica layers of the middle layer of the deep cervical fascia
- muscular fasica
- pretracheal fasica
- buccopharyngeal fascia
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hitchhiking nerves of the hypoglossal nerve (CN XII)
- fibers from C1 anterior ramus
- superior root of the ansa cervicalis
- geniohyoid
- nerve to thyrohyoid
Superior Thyroid artery supplies blood to the
thyroid gland
lymph nodes of the neck
superior and inferior deep cervical lymph nodes
green arrow
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styloid process
Infrahyoid “strap” muscles action
depress/stabilize the hyoid
Blue Arrow
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Ascending pharyngeal artery
Hot pink dots name
Hot pink dots are within which fasica layer
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infrahyoid muscles
musular fascia of the middle layer of the deep cervical fasica
green arrow
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alar fascia
green dot
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thyroid cartilage
Infrahyoid “strap” muscles
- sternohyoid
- omohyoid
- sternothyroid
- thyrohyoid
The cervical sympathetic chain lies ___________ to carotid sheath
posterior and medial
Red Arrow
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pyramidal lobe
orange line fascia
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prevertebral fasica of the deep layer of the deep cervical fasica
Red dot
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Sternothyroid
Yellow Arrow
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Superior thyroid artery
Blue Arrow
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Mylohyoid muscle
red arrow
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mastoid notch
(groove for the digastric)
posterior alar fasica opens
into the mediastinum
“danger space”
Digastric posterior belly innervation
Facial Nerve (CN VII)
Occipital artery supplies blood to the
skin on the posterior surface of the head
Ansa cervicalis innervates
motor to infrahyoid muscles
Red Arrow:
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Digastric muscle
Ansa cervicalis location
superficial to carotid sheath
Infrahyoid “strap” muscles innervation
C1-C4 anterior rami
Diagastric anterior belly origin
Digastric fossa (chin-ish area)
Blue Arrow
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carotid sinus and carotid body
Arteries of the anterior triangle:
- superior thyroid
- ascending pharyngeal
- lingual
- facial
- occipital
Facial Nerve (CN VII) innervates
- stylohyoid
- posterior digastric
- platysma
Inferior cervical ganglion vertebral level
C7-C8
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Purple Arrow
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Inferior thyroid artery
Purple Arrow
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Larynx
Geniohyoid innervation
C1 anterior ramus
blue arrow
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lesser horn of the hyoid bone
red arrow
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greater horn of the hyoid bone
Green Arrow
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Superior thyroid vein
Layers of the deep fascia of the neck
- Superficial layer
- Middle Layer
- Deep layer
Muscle that lies within the superficial fascia of the neck
playsma muscle
(green arrow)
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Digastric posterior belly origin
mastoid notch
Stellate ganglion vertebral level
C7-T1
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Red line surrounds:
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superficial (investing) layer of the deep cervical fasica
Nerve to mylohyoid of the anterior triangle innervates:
mylohyoid
anterior digastric
Red Arrow
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Facial Nerve (CN VII)
Transverse cervical nerve innervates:
sensory to skin of anterior triangle
blue dot
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cricoid cartilage
Green Arrow:
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Stylohyoid
The isthmus of the thyroid is at vertebral level:
C7
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Green Dot:
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Sternohyoid
anterior alar fascia stops at the
superior mediastinum “true retropharyngeal space”
Green Arrow
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Glossopharyngeal nerve (CN IX)
glands on the thyroid
parathyroid glands in two pairs
Superficial fascia of the neck
thin layer subcutaneous tissues
Blue dot
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sternocleidomastoid
blue line
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mylohyoid line
Green dot
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lobes of thyroid gland
Red Arrow
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Vagus Nerve (CN X)
green line
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oblique line of thyroid cartilage
orange circle
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genial tubercles (mental tubercles)
green dot
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body of the hyoid bone
green line fascia layer
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buccopharyngeal fascia of the middle layer of the deep cervical fascia
Nerves of the anterior triangle
- cervical plexus
- transverse cervical nerve
- ansa cervicalis
- hypoglossal nerve + hitchhikers
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Red arrow
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Inferior thyroid vein
origin of the internal jugular vein
jugular foramen
green area
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digastric fossa
Purple Arrow
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Facial artery
Digastric Insertion
Intermediate tendon (near the horn of the hyoid)
retropharyngeal space function
allows pharyns movement during swallowing
the retropharyngeal space is located
between the buccopharyngeal and prevertebral fascia
Green Arrow
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Hypoglossal nerve (CN XII)
Ascending pharyngeal artery supplies blood to the
upper pharynx
structures in the carotid sheath
- carotid arteries
- internal jugular vein
- vagus nerve (CN X)
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green dot
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trapezius