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34 Cards in this Set

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  • Back
infra-hyoid muscles
"strap" muscles, located inferior to the hyoid bone
the infra-hyoid muscles
sterno-hyoid, omo-hyoid, thyro-hyoid, sterno-thyroid
sterno-hyoid muscle origin, insertion
sternum, hyoid bone
omo-hyoid muscle origin, insertion
scapula of shoulder, hyoid bone, has superior and inferior muscle bellies that are connected by a tendon
thyro-hyoid muscle, origin, insertion
thyroid cartilage, hyoid bone
sterno-thyroid muscle, origin, insertion
sternum, thyroid cartilage
location of superior belly of omo-hyoid muscle
anterior triangle
location of inferior belly of omo-hyoid muscle
posterior triangle
planes of the infra-hyoid muscles
sterno-hyoid and omo-hyoid are on same plane, thyro-hyoid and sterno-thyroid are on a deeper plane
sterno-hyoid action
depresses hyoid after elevation during swallowing
omohyoid action
depresses, retracts, and steadies hyoid
sternothyroid
depresses hyoid and larynx
thyrohyoid
depresses hyoid and elevates larynx
ansa cervicalis
C1-C3, motor nerve loop, gives motor innervation to all infrahyoid muscles, except for thyrohyoid muscle
innervation of thyrohyoid muscle
direct continuation of ventral ramus of C1 spinal nerve after it gave off superior root of ansa cervicalis
geniohyoid muscle
part of suprahyoid muscles, innervated by ventral ramus of C1 spinal nerve
superior root of ansa cervicalis
comes from C1
inferior root of ansa cervicalis
comes from C2 and C3
True or False: Branches of ventral ramus of C1 branch off of hypoglossal nerve
false, they just take a ride on the back of the nerve, but aren't actually branches of it
hypoglossal nerve
cranial nerve XII
branches of ventral ramus of C1
superior root of ansa cervicalis, nerve to thyrohyoid muscle and nerve to geniohyoid muscle
main contents and underlying structures of sternocleidomastoid region
SCM, superior part of external jugular vein, great auricular nerve, transverse cervical nerve
main contents and underlying structures of lesser supraclavicular fossa
inferior part of internal jugular vein
main contents and underlying structures of posterior cervical region
trapezius, cutaneous branches of posterior rami of cervical spinal nerves, suboccipital region or triangle lies deep to superior part of this region
lateral cervical region (posterior triangle of neck) is made up of
occipital triangle and omoclavicular (subclavian) triangle
main contents and underlying structures of occipital triangle
part of external jugular vein, posterior branches of cervical plexuses of nerves, spinal accessory nerve (CN XI), trunks of brachial plexus, transverse cervical artery, cervical lymph node
main contents and underlying structures of omoclavicular triangle
subclavian artery (third part), sometimes part of subclavian vein, suprascapular artery, supraclavicular lymph nodes
anterior cervical region (anterior triangle of neck) is made up of
submandibular triangle, submental triangle, carotid triangle, muscular triangle
main contents and underlying structures of submandibular triangle
submandibular gland almost fills the triangle, submandibular lymph nodes, hypoglossal nerve, mylohyoid nerve, parts of facial artery and nerve
main contents and underlying structures of carotid triangle
carotid sheath containing common carotid artery and branches, internal jugular vein and tributaries, vagus nerve, external carotid artery and some of its branches, hypoglossal nerve and superior root of ansa cervicalis, spinal accessory nerve (CN XI), thyroid gland, larynx, pharynx, deep cervical lymph nodes, branches of cervical plexus
main contents and underlying structures of muscular triangle
sternothyroid and sternohyoid muscles, thyroid and parathyroid glands
external jugular vein is formed by
retromandibular vein and posterior auricular vein, join inferior to ear
retromandibular vein is located
behind angle of mandible
posterior auricular vein is located
behind ear