Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
50 Cards in this Set
- Front
- Back
What muscle divides the anterior and posterior triangles when looking at the neck from the side?
|
sternomastoid m
|
|
What is the base of the posterior cervical triangle?
|
clavicle
|
|
What is the posterior boundary of the posterior cervical triangle
|
trapezius
|
|
What is the anterior boundary of the posterior cervical triangle?
|
sternomastoid
|
|
What is the roof of the posterior cervical triangle?
|
skin
superficial fascia investing fascia |
|
What muscles is contained within the superficial fascia?
|
platysma
|
|
What nerve is embedded within the investing fascia?
|
accessory nerve (CN XI)
|
|
What comprises the floor of the posterior cervical triangle?
|
5 muscles
splenius capitis, levator scapulae, posterior scalene, middle scalene, anterior scalene |
|
What are the 5 muscles that comprise the floor of the posterior cervical triangle?
|
splenius capitis
levator scapulae posterior scalene middle scalene anterior scalene |
|
Origin of sternomastoid
|
manubrium & medial 1/3 of the clavicle
|
|
What is the manubrium?
|
upper part of sternum
|
|
What is the insertion of the sternomastoid
|
mastoid process
lateral 1/2 of the superior nuchal line of skull |
|
What is the action when one sternomastoid m contracts?
|
rotates and draws the head to the shoulder
|
|
What is the action when both sternomastoid mm contracts?
|
flex the cervical column
|
|
Innervation of the sternomastoid
|
spinal accessory nerve (CN XI)
|
|
What are the two roots of the spinal accessory nerve?
|
cranial & spinal
|
|
What does the cranial root of CN XI contribute?
|
accessory to the vagus nerve (CN X) because it provides part of the motor component
|
|
Where does the fibers from the spinal root come from?
|
ventral primary ramus of C2
ventral rami of C3 & C4 |
|
Where do the fibers from ventral primary ramus of C2 supply?
|
sternomastoid
|
|
Where do the fibers from ventral rami of C3 & C4 supply?
|
trapezius
|
|
What two subdivisions within the posterior cervical triangle are defined by the omohyoid muscle?
|
occipital triangle
supraclavicular triangle |
|
Where is the position of the occipital triangle compared to the omohyoid muscle?
|
superior
|
|
Where is the position of the supraclavicular triangle compared to the omohyoid muscle?
|
inferior
|
|
Origin of omohyoid m
|
medial lip of suprascapular notch
|
|
Insertion of omohyoid m
|
lower border of the body of the hyoid
|
|
Actions of omohyoid
|
steadies the hyoid
depresses & retracts the hyoid & larynx |
|
Innervation of omohyoid
|
ansa cervicalis (C2 & C3)
|
|
Where does the external jugular vein lie compared with sternomastoid
|
superficial
|
|
What is the external jugular vein a tributary of?
|
subclavian v
|
|
What v are tributaries of the external jugular v
|
retromandibular
posterior auricular transverse cervical suprascapular anterior jugular v |
|
Where does the axillary v become the subclavian v?
|
lateral border of 1st rib
|
|
What v is formed by the union of the subclavian & internal jugular v
|
brachiocephalic
|
|
What is the right subclavian artery a branch of?
|
brachiocephalic trunk
|
|
What is the left subclavian artery a direct branch of?
|
aortic arch
|
|
Both subclavian arteries pass posterior to what m
|
anterior scalene
|
|
How many parts of the subclavian a is there?
|
3
|
|
Where does the first part of the subclavian artery lie?
|
medial to anterior scalene
|
|
What are the branches of the 1st subclavian part?
|
vertebral and internal thoracic arteries
thyrocervical and costocervical trunks |
|
Where does the 2nd subclavian part lie?
|
passes posterior to anterior scalene
|
|
Where is the 3rd subclavian part positioned?
|
upper surface of the first rib, producing a groove on this bone
|
|
What branch of the external carotid artery runs deep to sternomastoid?
|
occipital artery
|
|
Where does the occipital artery pass?
|
crosses the upper portion of the posterior cervical triangle on way to scalp in occipital region
|
|
Where does the brachial plexus emerge?
|
between anterior and middle scalene muscles
|
|
What cutaneous branch of the cervical plexus ascends to the scalp posterior to the external ear>?
|
lesser occipital nerve (C2 & C3)
|
|
What cutaneous branch of the cervical plexus passes anterior to the sternomastoid to supply the external ear?
|
great auricular nerve (C2 & C3)
|
|
Besides innervating the auricle of the ear, what other branches does the great auricular nerve give?
|
skin of mastoid, parotid, masseteric regions
|
|
What cutaneous branch of the cervical plexus travels anteriorly to innervate the skin of the anterior cervical triangle?
|
transverse cervical nerve (C2 & C3)
|
|
What cutaneous branches of the cervical plexus desend in the neck to cross the clavicle and be distributed to the skin of the supraclavicular triangle, pectoral, deltoid & acromial regions?
|
supraclavicular nerves (C3 & C4)
***3 branches |
|
Several lymph nodes within the posterior cervical triangle drain what?
|
occipital scalp and back of neck
|
|
Where does the lymph eventually drain to?
|
jugular lymph trunk
|