Posterior Triangle Of The Neck

Front 1

What R the boundaries of the posterior triangle of the neck?

Back 1

posterior border of SCM
anterior border of trapezius
middle third of clavical

Front 2

what forms the apex of posterior triangle of neck?

Back 2

apex is formed by the SCM and trap at occipital bone

Front 3

what divides the poterior triangle in two smaller triangles

Back 3

inferior belly of omohyoid muscle

Front 4

what are the two triangles in the posterior triangle?

Back 4

subclavian triangle
occipital triangle

Front 5

what are the two fascial layers of the neck?

Back 5

superficial cervical fascia
deep cervical fascia

Front 6

what does the roof of the posterior triangle include?

Back 6

deep cervical fascia
superficial fascia
platysma muscle
skin

Front 7

what is the innervation to the platysmal muscle

Back 7

cranial nerve VII (specifically the cervical branch)

Front 8

what is the action of the platysmal muscle?

Back 8

facial expression of sadness, pulls corners of mouth down

Front 9

what forms the floor of the posterior triangle

Back 9

deep cervical fascia (carpet)
slenius capitus
levator scap
post, midl and ant scalenes

Front 10

what are the sensory branches of the cervical plexis?

Back 10

lesser occipital
great auricular
transverse cervical
supraclavicular

Front 11

where does the phrenic nerve go? why

Back 11

diaphragm; innervated while still above the heart and took its nerve with it with development.

Front 12

what provides sensory innervation to the skin over the scalpjust behind the ear?

Back 12

lesser occiptal C2

Front 13

what provides sensory innervation to the skin inferior to auricle(ear)?

Back 13

great arucular C2, C3

Front 14

what provides sensory innervation to the skin over the antererior cervical triangle?

Back 14

transverse cervical C2, C3

Front 15

what supplies sensory innervation to the skin over the clavicle and superior wall of the chest?

Back 15

all three branches (medial, intermediate, & lateral) of the supraclavicular C3 C4

Front 16

what are the branches of the ansa cervicalis?

Back 16

omohyoid, sternohyoid, sternothyroid, omohyoid, thyrohyoid, geniorhyoid

Front 17

where would a cervical plexus block be inserted?

Back 17

junction of superior 1/3 and middle 1/3 of SCM.

Front 18

what roots make up the phrenic nerve?

Back 18

C3 C4 C5

Front 19

what are the motor nerves of the cervical plexis

Back 19

ansa cervicalis and its branches & phrenic nerve

Front 20

what muscles does the ansa cervicalis supply?

Back 20

sternohyoid, sternothyroid, and omohyoid

Front 21

what provides motor nerve supply to the trap and SCM?

Back 21

cranial nerve XI

Front 22

what are the fibers that give MOTOR nerve supply to the thyrohyoid and geniohyoid only

Back 22

C1 fibers via the hypoglossal (CN 12)

Front 23

in to what does the external jugular drain

Back 23

subclavian vein

Front 24

what two arteries sit on top of the anterior scalene

Back 24

transverse cervical artery and suprascapular arter

Front 25

the INTERNAL jugular and the subclavian join to form what major vein?

Back 25

brachiocephalic

Front 26

where does a supraclavicular brachial plexus block go/

Back 26

superior to the midpoint of the clacical.

Front 27

what is the Origin / Insertion to the splenius Capitus (which forms some of the floor of the posterior triangle)

Back 27

O: spinous process of T6-T1
I: Occipital bone and Mastoid process

Front 28

what is the Origin / Insertion of the levator scapulae which forms part of the floor of the posterior triangle?

Back 28

O: transverse process of C4-C2
I: angle of the scapula

Front 29

what is the Origin / Insertion of the scalenes --which form part of the floor of the posterior triangle?

Back 29

all three originate from the transverse process of C4-C6.
Post: inserts on the 2nd rib
Middle: inserts on the 1st rib
Ant: inserts on the 1sth rib

Front 30

what is the level of origin of the cervical plexus

Back 30

ventral rami of C2, C3, and C4 with contribution fromm C1 and C5

Front 31

are the motor branches of the cervical plexus contained in the posterior triangle?

Back 31

no. they are contained in the ANTERIOR triangle.

Front 32

what arteries are contained in the cervical posterior triangle?

Back 32

the 3rd part of the sublclavian artery
the transverse cervical artery
the suprscapular artery
the occipital artery

Front 33

what nerves are contained in the posterior cervical triangle?

Back 33

the sensory branches of the cervical plexus
the medial, lateral, & posterior trunks of the brachial plexus
spinal accessory n (CN 11)

Front 34

what lymph nodes are contained in the posterior triangle of the neck?

Back 34

the superficial group of cervical nodes located along the external jugular vein.

Front 35

what veins are located in the posterior cervical triangle?

Back 35

the external jugular (which runs across the SCM)
and the subclavian vein

Front 36

what levels contribute to the ANSA CERVICALUS?

Back 36

C1 C2 & C3

Front 37

what levels contribute to the SENSORY branches of the cervical plexus?

Back 37

C2 C3 & C4