cervical triangles Flashcards
what are the superficial structures of the neck
skin, superficial fascia, platysma, cutaneous nerves, superficial veins, superficial lymph nodes
what is function of platysma
facial expressions
what is the supply of the platysma nerve
facial
origin of platysma
deep fascia covering the pectoralis major and deltoid muscles
insertion of platysma
lower margin of the body of mandible blending with the muscle at the angle of the mouth
nerve supply of platysma
cervical branch of facial nerve
action of platysma
depresses the mandible and draws the lower lip and angle of the mouth (make frown)
greater occipital is from where
dorsal rami of c2
what muscles does the greater occipital separate
semispinalis capitus and spinalis capitis
the lesser occipital is from what
ventral rami c2
what are the branches of cervical plexus
lesser occipital, great auricular, transverse cervical , supraclivuclar
what is the great auricular from
ventral rami c2,c3
what I s the transverse cervical from
ventral rami c2,3
what is the supraclavicular from
c3,4 ventral rami
what nerve runs on the posterior border of the scm
lesser occipital nerve c2
what nerve from the cervical plexus also accompanies the external jugular vein
great auricular
what nerve crosses across the scm
transverse cervical
external jugular vein drains most of the () and ().
scalp and side of the face
The external jug v begins at the angle of () with the union of the () vein and () vein
angle of mandible, union of posterior auricular vein and posterior division of retromandibular vein
where does th e ext jug v end at
subclavian vein
what is the only vein oto drain into the subclavian
the external jug v
the external jug vein is external to the ()
scm
what do you see with congested heart failure, stenosis, valsalva meanuver
the ext jug vein sticking out
where does the superficial temporal veina nd common facial vein? (or ext jug v) unite
angle of mandible
the anterior jugular vein arises near the () from small veins underneath the chin
hyoid bone
the ant jug vein terminates into the () or ()
EJV or subclavian v
where is the jugular venous arch
above the suprasternal notch, the left and right ant jug vein unite
what presents problems with emergency tracheostomy
jugular venous arch being cut
what venous structure is not present in everyone
jugular venous arch
what separates the two triangles of the neck
anterior and posterior
origin of scm
manubrium and medial third of clavicle
insertion of scm
mastoid process of temporal bone
nerve supply of scm
spinal part of accessory nerve
c2,3
action of scm
bilaterally: extend head at atlanto occipital jt, flex neck at cerv vert
unilat: laterlaly bends the neck ipsilaterally, and rotates head contralaterally
what is torticollis/wryneck
shortening of scm (congenital) or spasmodic contraction of scm
whow do baby get torticollis
when baby pulled out (fibrosis make it permanent)
what is the borders of the post triangle
ant: scm
post: trapezius muscle
inf: middle third of clavicle
what divides the posterior triangle of neck
inferior belly of omohyoid muscle
where is the occipital triangle
b/w scm, trap, and inferior belly of omohyoid
where is the supraclaviular triangle located
smaller triangle b/w inferior part of scm, inferior belly of omohyoid and middle third of clavicle
what can you feel in an occipital triangle
lymph nodes
what is another name for the supraclavicular tirangle
subclavian triangle cause it contains the subclavian artery and vein
what are the contents of the posterior triangle a (4), veins (3) nerves (3)
arteries: subclavian, superficial transverse cervical, suprascapular, occipital artery
veins: external jugular, its tributaries, subclavian vein
nerve: brachial plexus, spinal accessory, branches of cervical plexus
occipital artery is a branch of the
external carotid/jugular a
