Triangles of the Neck (1) Flashcards
(50 cards)
midline elevation created by the thyroid cartilage
laryngeal prominence
depression on superior border of laryngeal prominence
thyroid notch
groove located upon superior border of manubrium between two clavicular heads
suprasternal (jugular) notch
depression located lateral to clavicular origin of SCM muscle, posterior to middle third of clavicle, and anteromedial to clavicular insertion of trapezius
(serves as a pressure point to decrease bleeding of the upper extremity)
supraclavicular fossa
unpaired bone which lies superior to the laryngeal prominence
hyoid bone
- body
- greater horns
- lesser horns
signet ring-shaped cartilage which is located inferior to the thyroid cartilage
cricoid cartilage
- lamina (faces posteriorly - thick)
- arch (anteriorly - thin)
serves as partial attachment of the sternocleidomastoid muscle
mastoid process
superficial muscle originating from clavipectoral fascial, coursing superiorly over neck
platysma muscle
consists of carotid artery and vein, and vagus nerve
carotid sheath
“sleeve” binding all structures in the neck; splits to encompass SCM and trapezius
investing layer of dense connective tissue
covering supra and infrahyoid muscles (strap muscles)
infrahyoid fascia
viscera covered with a layer of fascia including the thyroid and parathyroid glands, trachea, and esophagus
pretracheal fascia
covering vertebral musculature
prevertebral (deep cervical) fascia
anterior, posterior, inferior, roof, and floor of
POSTERIOR TRIANGLE
anterior - SCM posterior - trapezius inferior - clavicle roof - skin, superficial fascia and platysma floor - prevertebral fascia
closest to the skin and can sometimes be seen as a rope like bulge on the side of neck; height is greater than 3 to 4 cm = could be possible “back up”
external jugular vein
drains into the subclavian vein
external jugular vein
joins the subclavian vein to form the brachiocephalic vein
internal jugular vein
right and left brachiocephalic veins join to form
superior vena cava
superior vena cava empties into the ____ atrium of the heart
right
splits into anterior and posterior branches;
anterior branch joins facial vein to form common facial vein
retromandibular vein
drains into the external jugular vein
posterior retromandibular vein
drains into the external jugular vein
anterior jugular veins
origin, insertion, innervation, action of SCM
origin -
: sternal head - anterior surface of manubrium
: clavicular head - superior surface of medial 1/3 clavicle
insertion - lateral surface of mastoid process, lateral half superior nuchal line
innervation - spinal root of accessory n. (CN 11)
action - laterally flexes neck and rotates head to opposite side; flex the neck so chin is thrust forward
origin, insertion, innervation, action of TRAPZIUS
origin - medial third of superior nuchal line, EOP, nuchal ligament, SP of C7-T12, lumbar and sacral spinous processes
insertion - lateral third of clavicle, acromion, and spine of scapular
innervation - spinal root of accessory (CN 11); C2-C3
action - elevate, retract, depress scapula
