The Organization of the Neck I Flashcards Preview

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Flashcards in The Organization of the Neck I Deck (45):
1

surface anatomy:

angle b/n neck & mandible (C3 level): ___ bone

C4, C5 level: ___ cartilage

C6 level: ___ cartilage

palpable in lower neck, superior to the jugular notch: ___

hyoid

thyroid

cricoid

tracheal rings

2

triangles of the neck:

the neck is divided into anterior & posterior triangles by the ___ muscle

___ triangle lies in front of this muscle

___ triangle lies behind this muscle

sternocleidomastoid

anterior

posterior

3

sternocleidomastoid muscle (landmark of neck):

nerve supply (2)

spinal accessory nerve (CN XI)

ventral rami of C2, C3

4

posterior triangle:
boundaries:

___ muscle

___ muscle

middle 1/3 of the ___

sternocleidomastoid

trapezius

clavicle

5

posterior triangle:

the ___ nerves run across the triangle within the investing layer of deep fascia

the muscular floor of the triangle is covered by the ___ layer of deep fascia

supraclavicular

prevertebral

6

posterior triangle:

the inferior belly of the ___ muscle divides the posterior triangle into two triangles: ___ & ___

omohyoid

occipital
subclavian

7

posterior triangle:
occipital triangle:

(small/large) (upper/lower) triangle

named b/c the occipital ___ appears in its apex

the ___ nerve is the most important nerve crossing this triangle

large
upper

artery

accessory

8

posterior triangle:
subclavian triangle:

(small/large) (upper/lower) triangle

the inferior part of the ___ vein crosses this triangle superficially

may include the ___ vein & the 3rd part of the ___ artery

small
lower

external jugular

subclavian
subclavian

9

posterior triangle:

the following muscles make up the ___:

splenius capitus
levator scapulae
scalenus posterior
scalenus medius
scalenus anterior

muscular floor

10

nerves in the posterior triangle (5)

accessory nerve (CN XI)

dorsal scapular nerve

cutaneous branches of the cervical plexus

phrenic nerve (C4, C4, C5)

roots of the brachial plexus

11

nerves in the posterior triangle:
accessory nerve (CN XI):

exits the cranial cavity through the ___

runs downward & laterally to reach the superior border of the ___ muscle

passes either ___ to the SCM or ___ it & supplies it

continues downward & laterally across the posterior triangle within the ___ fascia & disappears beneath the ___ muscle & innervates it

note: the superficial location of the accessory nerve in the posterior triangle makes it susceptible to ___

jugular foramen

sternocleidomastoid

deep
through

investing
trapezius

injury

12

nerves in the posterior triangle:
dorsal scapular nerve:

branch of the ___ arising from ventral ramus of ___

pierces the ___ & descends deep to the ___

brachial plexus
C5

scalenus medius
levator scapulae

13

nerves in the posterior triangle:
cutaneous branches of the cervical plexus:

emerge from behind the ___ border of the SCM

nerve branches (4)

posterior

lesser occipital nerve (C2)
greater auricular nerve (C2 & C3)
transverse cervical nerve (C2 & C3)
supraclavicular nerves (C3 & C4)

14

nerves in the posterior triangle:
cutaneous branches of the cervical plexus:
lesser occipital nerve (C2):

ascends along the ___ border of the SCM

distributed to the skin of the ___ & ___ behind the ear

posterior

neck
scalp

15

nerves in the posterior triangle:
cutaneous branches of the cervical plexus:
great auricular nerve (C2 & C3):

runs upward ___ the SCM toward the inferior pole of the ___ gland

usually accompanied by the ___ vein

supplies:
- much of the external ___
- the skin over the ___ gland & its sheath
- an area of skin extending form the angle of the ___ to the ___

across
parotid

external jugular

- ear
- parotid
- mandible, mastoid process

16

nerves in the posterior triangle:
cutaneous branches of the cervical plexus:
transverse cervical nerve (C2 & C3):

curves around the ___ border of the SCM near its ___

supplies most of the skin of the ___ region

posterior
midpoint

anterior cervical

17

nerves in the posterior triangle:
cutaneous branches of the cervical plexus:
supraclavicular nerves (C3 & C4):

emerge from a common trunk at the ___ border of the SCM

descends under the ___ & divides into several branches

the branches distribute as far inferiorly as the ___ & ___ & as far laterally & posteriorly as the skin over the ___

they also supply the ___ joint

posterior

platysma

sternal angle
2nd rib
spine of the scapula

sternoclavicular

18

nerves in the posterior triangle:
phrenic nerve (C3, C4, C5):

courses inferiorly on the anterior surface of the ___ muscle

the ___ & ___ arteries cross the nerve superficially

referred pain from the diaphragm involves the distribution area of the ___ nerves

scalenus anterior

transverse cervical
suprascapular

supraclavicular

19

nerves in the posterior triangle:
roots of the brachial plexus:

appear b/n the ___ & ___ muscles

anterior scalene
middle scalene

20

arteries in the posterior triangle:

the third part of the ___ artery

branches of the ___ (from the first part of the ___ artery):
- ___ artery
- ___ artery

subclavian

thyrocervical trunk (subclavian)
- transverse cervical
- suprascapular

21

veins in the posterior triangle (2)

external jugular

subclavian

22

veins in the posterior triangle:
external jugular vein:

begins on the ___ surface of the SCM at about the level of the ___

formed by the union of the ___ vein & posterior division of the ___ vein

closely paralleled by the ___ nerve

at the base of the neck, it pierces the investing layer of ___ fascia & ends in the ___ vein

superficial
angle of the mandible

posterior auricular
retromandibular

great auricular

deep
subclavian

23

veins in the posterior triangle:
subclavian vein

curves through the ___ part of the posterior triangle

it passes anterior to the ___ muscle & ___ nerve

inferior

anterior scalene
phrenic

24

anterior triangle:
boundaries:

midline of the ___ (anterior)

___ muscle (posterior)

body of ___ (superior)

neck

sternocleidomastoid

mandible

25

anterior triangle:

subdivided into smaller triangles by the ___ & ___ muscles

digastric

omohyoid

26

anterior triangle:
digastric muscle:
bellies (2)

anterior
posterior

27

anterior triangle:
digastric muscle:
nerve supply:

anterior belly: ___

posterior belly: ___

mandibular division of the trigeminal nerve (CN V)

facial nerve

28

anterior triangle:
digastric muscle:
action:

elevates the ___ or depresses the ___

hyroid
mandible

29

anterior triangle:
omohyoid muscle:

bellies (2)

nerve supply

action: depresses & fixes the ___

superior
inferior

ansa cervicalis

hyoid bone

30

subdivisions of the anterior triangle:
submental triangle contents:

___ lymph nodes
___ vein

submental
anterior jugular

31

subdivisions of the anterior triangle:
digastric (submandibular) triangle contents:

___ gland
___ lymph nodes
___ artery & vein
___ nerve
___ nerve

submandibular
submandibular
facial
hypoglossal
mylohyoid

32

subdivisions of the anterior triangle:
carotid triangle contents:

___ artery
___ & ___ arteries
___ vein
branches of the ___ artery
___ nerve & ___ branches (CN ___)
___ nerve (CN ___)
___ nerve (CN ___)
___
___ lymph nodes

common carotid
internal & external carotid
internal jugular
external carotid
vagus, laryngeal, X
accessory, XI
hypoglossal, XII
ansa cervicalis
deep cervical

33

subdivisions of the anterior triangle:
muscular triangle contents:

___ muscle
___ muscle
___ muscle
___ & ___
___ & ___ glands

sternohyroid
sternothyroid
cricothyroid
larynx & trachea
thyroid & parathyroid

34

hyoid muscles:

primarily concerned w/ steadying & moving the ___ & ___

___ muscles - elevate the hyoid muscles

___ muscles - compress the hyoid muscles

hyoid
larynx

suprahyoid
infrahyoid

35

hyoid muscles:
suprahyoid muscles (4)

mylohyoid
stylohyoid
geniohyoid
digastric

36

hyoid muscles:
suprahyoid muscles:
digastric:

nerves:
- anterior belly: ___
- posterior belly: ___

action: elevates ___ or depresses ___

- CN V3
- CN VII

hyoid
mandible

37

hyoid muscles:
suprahyoid muscles:
mylohyoid:

forms the floor of the ___

nerves: ___ nerve from the inferior alveolar branch of the ___ nerve (CN ___)

action: raises the ___, floor of ___, & the ___ during swallowing or depresses the mandible

mouth

mylohyoid
mandibular (VIII)

hyoid
mouth
tongue

38

hyoid muscles:
suprahyoid muscles:
geniohyoid:

deep to the ___

nerves: ___ via the ___ nerve

action: raises the ___ or depresses the ___

mylohyoid

C1
hypoglossal

hyoid
mandible

39

hyoid muscles:
suprahyoid muscles:
stylohyoid:

closely applied to the posterior belly of the ___

nerves: ___

action: raises the ___ & pulls it posteriorly

digastric

CN VII

hyoid

40

hyoid muscles:

infrahyoid muscles (4)

first three = "___ muscles"

sternohyoid
omohyoid
sternothyroid
thyrohyoid

strap

41

hyoid muscles:
infrahyoid muscles:
sternohyoid:

nerves: ___

action: depresses the ___ bone after elevation during swallowing

ansa cervicalis

hyoid

42

hyoid muscles:
infrahyoid muscles:
omohyoid:

nerves: ___

action: depresses & fixes the ___ bone

ansa cervicalis

hyoid

43

hyoid muscles:
infrahyoid muscles:
sternothyroid:

nerves: ___

action: draws ___ (___ cartilage) & ___ downward

ansa cervicalis

larynx
thyroid
hyoid

44

hyoid muscles:
infrahyoid muscles:
thyrohyoid:

origin: ___ line of ___ cartilage

innervation: body & greater horn of the ___ bone

oblique
thyroid

hyoid

45

sternocleidomastoid muscle:
action:

flex head at ___ joint & flex ___

one muscle alone tilts toward shoulder on ___ side

rotates head to ___ side

atlantooccipital
cervical column

same

opposite

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