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Unit 16: Anterior Triangle and Submandibular Region
Terms in this set (62)
median line, superior belly of the omohyoid, anterior borders of the SCM
What are the borders of the muscular triangle in the neck?
What nerve innervates the sternohyoid, omohyoid, and sternothyroid?
VPR of C1 via hypoglossal nerve
What nerve innervates the thyrohyoid muscle?
What is the only strap muscle that elevates the thyroid cartilage?
What muscle inserts on the oblique line of the thyroid cartilage?
At what vertebral level is the hyoid bone located?
What bone does the hyoid articulate with?
What is the scientific name for the Adam's apple?
superior belly of omohyoid, posterior belly of digastric, anterior border of SCM
What are the boundaries of the carotid triangle?
blood pressure via baroreceptrs
What does the carotid sinus detect?
CN IX and X
What innervates the carotid body?
blood chemistry and oxygen content
What does the carotid body detect?
superior thyroid (superior laryngeal)
What are the branches of the external carotid artery?
Which artery runs deep to the hyoglossus muscle?
external branch of the superior laryngeal nerve
What nerve runs with the superior thyroid artery?
superior laryngeal artery
What artery runs with the internal branch of the superior laryngeal nerve?
maxillary artery and superficial temporal artery
ECA enters parotid gland to divide into the terminal branches
What are the terminal branches of the external carotid artery and within what structure do they divide?
between the ear and mastoid process
Between what two structures does the posterior auricular artery ascend?
What ventral primary rami form the ansa cervicalis?
What ventral primary rami for the cervical plexus?
superior belly of omohyoid, upper sternohyoid, upper sternothyroid
What nerves make up the descendens hypoglossi (superior root)? What muscles does it innervate?
inferior belly of omohyoid, lower sternohyoid, lower sternothyroid
What nerves make up the descendens cervicalis (inferior root)? What muscles does it innervate?
paroxysmal supraventricular tachycardia
What does carotid massage diagnose/treat?
greater occipital nerve
What nerve does the occipital artery travel with?
What nerve does the superficial temporal artery travel with?
two anterior bellies of the digastric muscle, the hyoid bone
What are the borders of the submental triangle?
the inferior alveolar nerve, artery, and vein
What structures run through the mandibular foramen?
posterior belly of the digastric muscle
What suprahyoid muscles does the facial nerve innervate?
lowers the mandible (opens mouth)
What is the action of the digastric muscles if the hyoid is fixed?
raises the hyoid
What is the action of the digastric muscles if the mandible is fixed?
mastoid notch of mastoid process
What is the origin of the posterior belly of the digastric muscle?
hyoid bone, median raphe
Where does the mylohyoid insert?
C1 via hypoglossal nerve
What innervates the geniohyoid muscle?
anterior belly of digastric muscle
What muscles does the nerve to the mylohyoid muscle innervate?
1. hypoglossal nerve
2. lingual nerve
3. deep part of and duct of submandibular gland
What structures run between the mylohyoid muscle and the hyoglossus muscle?
What structure runs deep to the hyoglossus muscle?
What does the submandibular duct open into the oral cavity as?
chorda tympani nerve - branch of the facial nerve
What is the innervation of the glands?
continuation of angular vein, which is formed by supratrochlear and supraorbital veins
What forms the facial vein?
deep facial vein
What vein connects the facial vein to the pterygoid plexus of veins?
anterior branch of retromandibular vein and facial vein
What forms the common facial vein?
Where does the external jugular drain into?
superficial temporal vein and maxillary vein
What forms the retromandibular vein?
formation of a blood clot within the cavernous sinus usually from a spreading infection
What is a cavernous sinus thrombosis?
What two muscles are supplied by C1 by way of the hypoglossal nerve?
CN IX, X, XI
What cranial nerve does the internal jugular vein travel with through the jugular foramen?
inferior petrosal sinus
What two veins form the internal jugular vein?
Which foramen does the mandibular branch of the trigeminal nerve (V3) pass through?
Which nerve passes through the stylomastoid foramen?
What does the cervical branch of the facial nerve innervate?
superior laryngeal artery
internal branch of the superior laryngeal nerves
sensory to the laryngeal mucosa above the true vocal cords
What structures pierce the thyrohyoid membrane? What does they supply?
inferior cervical ganglion and first thoracic ganglion
What ganglia form the stellate ganglion?
At what vertebral level is the superior cervical ganglion?
At what vertebral level is the middle cervical ganglion?
superior - C1-4
middle - C5-6
inferior - C7-8
What grey communicating rami make up the superior, middle and inferior cervical ganglion?
6th tracheal ring
What are the superior and inferior borders of the thyroid lateral lobes?
superior and inferior thyroid arteries
What is the blood supply to the thyroid gland?
thyrocervical trunk off the subclavian artery
Where does the inferior thyroid artery branch off from?
internal jugular vein
Where do the superior and middle thyroid veins drain?
left brachiocephalic vein
Where does the inferior thyroid vein drain?
thyroglossal duct cyst
What is the most common cause of midline neck masses?
the recurrent laryngeal nerves - important clinically
What nerves share a close relationship with the parathyroid glands?
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