cervical triangle Flashcards
what are the 3 regions of the post cervical triangle
lat + ant cervical triangle seperated by the SCM region
Ant, Post and Inf borders of ccervical tri
Ant- post border of SCM
post- ant border of trapezius
inf-middle 1/3 of clavical
where is the nerve point
post 1/3 and middle 1/3 of SCM
-a bunch of cut. nerves of the cervical plexus emerge here and innervate the skin
what travels thru the occipital triangle
cervical n.
spinal accessory n.
Occipital A+V
what travels thru the omoclavicular tr
Brachial n plexus
Subclavian A + V
the brachial plexus travels between what 2 scalenes
Ant and middle scalene
what is the deepest fascia in the neck and what does it envelop
Deep fascia prevertebral- all deep muscles (ant + middle scalene and brachial plexus)
what lvls give you the cervical n plexus
C1-4 APR
what are the cutaneous n of the cervical n plexus (4)
lesser occipital (c2,3)- behind ear great auricular (c2,3)= under ear and back half of it Transverse cervical (c2,3)- front of neck supraclavicular (c3-5)- shoulder region
what are the motor nerves of cervical plexus (1)
phrenic n c3,4 from cervcal and c5 from brachial
what is the first nerve to appear at the nervepoint and parth of it
deep to SCM
Spinal Accessory N
the external jugular vein is a continuation of what vein
post auricular v
path of external jugular
joins retromandibular v and travels along roof of post cert triangle across subclavian vein and drain into brachiocephalic v the vena cava
muscular floor of post cervical triangle
ant scalene, middle scalene, post scalene, lev snap, splenius cap
what does the subclavian a come from on L and R
left- from aortic arch directly
right- from brachiocephalic trunk
where do you palpate the subclavian a
supracalvicular foss (oomoclavicular triangle)
on what side of the ant scalene muscle will you find the phrenic nerve
laterally (crosses lat to med when entering thoracic cavity)
dorsal scap nerve is deep to what scalene
middle
path of long thoracic nerve (lvls)
c5-8
-deep to mid scalene
location of spinal accessory, dorsal scap, long thorcic, suprasca and phrenic n in relation to scalenes/lev
spinal access- behind levator
dorsal scap, long snap- behind middle
suprascap- ant to middle
phrenic- ant to ant
lesion of the spinal accessory nerve by the surgical procedures in post cer triangle leads to
unilat paralysis of traps and SCM
how do u do a phrenic nerve block
anesthetic is injected around where the nerve lies on ant scalene
for anesthesia where is the main injection site
sup to midpoint of the clavical
what does a injury to upper trunk of the brachial plexus + suprascap nerve result in and how does it happen
- fracture of middle 1/3 of clav
- leads to waiters tip pos (upper limb extended and medially rotated)
what does prominence of external jugular vein idication of
obstruction of venous blood flow in SVN, heart failure or enlarged supraclacular lymph nodes
