Anterior and posterior triangles of the neck Flashcards
What are the borders of the posterior triangle
sternocleidomastoid, trapezius, middle third of clavicle
what muscles are found in the floor posterior triangle of the neck
semispinalis capitis, splenius capitis, levator scapulae, and scalene muscles (deep to prevertebral fascia)
also inferior belly of omohyoid
what structures make up the roof of the posterior triangle
skin, superficial fascia and investing layer of deep cervical fascia
what nerve can be found in the posterior triangle
accessory nerve
what branches of the cervical plexus occur in the posterior triangle
lesser occipital (C2) great auricular (C3) transverse cervical (C2,3) supraclavicular (C3,4)
name the strap muscles
sternohyoid, sternothyroid, thyrohyoid, omohyoid
what artery is deep to omohyoid
subclavian
what are the branches of the thyrocervical trunk of the subclavian artery
inferior thyroid artery, suprascapular artery and transverse cervical artery
what fascia does the external jugular vein pierce en route to the subclavian vein
investing fascia
where are the anterior jugular veins
run vertically in the neck near the midline in the superficial fascia
what muscles does the hyoid bone attach to
strap muscles
what structures does the stylohyoid ligament attach to
styloid process and the lesser cornu of the hyoid bone
what muscles can be found deep to sternohyoid and sup belly of omohyoid
thyrohyoid and sternothyroid
what muscle joins the cricoid and thyroid cartilages together
cricothyroid
what tracheal rings are covered by the thyroid gland
2-4
what muscles form the floor of the mouth
mylohyoid and ant belly of digastric
where is the facial artery
lateral to digastric and passing over the lower margin of the mandible
what structures can be found deep to mylohyoid
hypoglossal nerve and geniohyoid
what is the function of ansa cervicalis
innervates the sternothyroid muscle, sternohyoid muscle, and the omohyoid muscle (infrahyoid muscles)
where is the carotid sinus found
upper border of thyroid cartilage (c3/4)
what does the external carotid artery terminate as
the superficial temporal and maxillary artery
what does the maxillary artery supply
deep structures of the face
what is the superior laryngeal artery a branch of
superior thyroid artery
name some branches of the external carotid
superior thyroid artery, lingual, facial, occipital, post auricular, maxillary, sup temporal
what artery can be found in the infratemporal fossa
maxillary artery
what is the middle meningeal artery a branch of (supplies the dura mater)
maxillary artery
which cervical vertebrae transmit the vertebral artery
C1-6
which cervical vertebrae have bifid spinous processes
c3-6
what are the unique features of the atlas
absence of a body
groove on the posterior arch made by the vertebral artery
concave superior facets that articulate with the occipital condyles
almost transverse articular facets that articulate with C2
what features are unique to C2
dens and articular facet
how many cervical spinal nerves are there
8 (only 7 vertebrae)
