posterior cervical triangle Flashcards
fascial spaces
carotid sheath
pretracheal space
retropharyngeal space
prevertebral or “danger” space
carotid sheath between ____ and ____
SCM; prevertebral muscles
infections in carotid sheath can spread from ____ to _____
skull; middle mediastinum
pretracheal space between _____ and ____
trachea; infrahyoids
pretracheal space extends from ____ to _____
thyroid cartilage; anterior mediastinum
retropharyngeal space between ____ and _____
buccopharyngeal; alar fascia
retropharyngeal space extends from ____ down into _____
skull base; superior mediastinum
prevertebral or danger space between ____ and _____ fascia
alar; prevertebral
infections in danger space can spread from ____ to ____ which is at vertebral level ____
skull; posterior mediastinum; T12
retropharyngeal space only extends to about ____ vertebral level
T4/T5
contents of posterior cervical triangle
platysma m. external jugular vein cutaneous nn. motor nn. transverse cervical a. and suprascapular a. deep mm.
cutaneous nerves of posterior triangle
lesser occipital (C2-C3) great auricular (C2-C3) transverse cervical (C2-C3) supraclavicular (C3-C4
lesser occipital n. runs on the ____ of _____
posterior border; SCM
motor nerves of the posterior triangle
accessory n. (CN XI)
phrenic n. (C3,C4,C5)
accessory n. supplies:
SCM and trapezius mm.
trapezius m. also receives proprioceptive fibers from ___
C3-C4
phrenic n. descends vertically along ____ and is crossed anteriorly by ____ and ____
anterior scalene m.; transverse cervical a. and suprascapular a.
Phrenic n. enters thorax between ___ and _____
subclavian a. and v.
the EJV is formed by the ____ and ____ and then drains into the ____
posterior division of the retromandibular v.
posterior auricular v.
subclavian v.
transverse cervical a. and suprascapular a. are branches off the _____
thyrocervical trunk
transverse cervical and suprascapular aa. pin down ____ on top of _____
phrenic n. ; anterior scalene m.
deep mm. of posterior triangle
splenius capitis m.
levator scapulae m.
anterior/middle/posterior scalene mm.
inferior belly of omohyoid m.
A and Inn of splenius capitis m.
A: extends and laterally rotates head and neck
Inn: dorsal rami of spinal nn.
A and Inn of levator scapulae m.
A: elevates scapula
Inn: dorsal scapular n. (C5)
A and Inn of scalene mm.
A; tilt neck laterally
Inn: ventral rami of C3-C8 nn.
interscalene triangle formed by:
anterior/middle scalenes and 1st rib
____ and ____ pass through interscalene triangle
brachial plexus; subclavian a.
____ passes anterior to anterior scalene m.
subclavian v.
superficial fascia is comprised of _____ and ____
loose connective tissue; fat
deep fascia is comprised of _____ and is devoid of ___
dense, organized connective tissue; fat
lesser occipital n. crosses over portion of _____ and supplies:
occipital a. ; skin of the scalp at the apex of the triangle
great auricular n. runs with ____ superiorly toward the ear and supplies:
EJV; lobe and skin posterior to the auricle; also supplies angle of mandible to mastoid process
transverse cervical n. supplies:
skin of anterior cervical triangle and lateral neck
supraclavicular nerves run superficial to ____ and deep to ____ and supply:
clavicle; platysma ; skin of clavicular region
in the lower part of the posterior triangle, EJV pierces the ____ to end in the ____
investing layer of cervical fascia; subclavian v.
suprascapular a. goes deep to ____
suprascapular ligament
origin and insertion of levator scapulae
O: transverse processes of C1-C4 vertebrae
I: superomedial border of scapula
interscalene triangle formed by:
anterior scalene, middle scalene and 1st rib
____ and ____ pass through interscalene triangle
brachial plexus; subclavian a.
____ passes anterior to anterior scalene m.
subclavian v.
