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Flashcards in neck: anterior triangle Deck (62)
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1

superficial neck: between what bones? superficial to what fascias?

Between mandible/occipital bone & clavicles
Superficial to prevertebral & visceral pretracheal fasciae
Four regions based on 2 muscles
Sternocleidomastoid
Posterior
Lateral (posterior triangle)
Anterior (anterior triangle)

2

superficial neck: divided into ___ regions based on __ muscles?

4 regions based on 2 muscles

3

superficial neck: what are the 4 regions that it is subdivided into? what are the two muscles that create these divisions?

Sternocleidomastoid
Posterior
Lateral (posterior triangle)
Anterior (anterior triangle)

-sternocleidomastoid and trapezius

4

anterior triangle: what make up the borders? - anterior, posterior, superior and floor

Anterior-midline of neck
Posterior-anterior border of SCM
Superior-inferior border of mandible
Floor-pharynx, larynx, & thyroid

5

the anterior triangle is subdivided by what two muscles into how many smaller triangles?

Subdivided by omohyoid & digastric into 4 smaller triangles

6

what are the 4 small triangles that the anterior neck is divided into?

Submental (unpaired)
Submandibular (paired)
Carotid (paired)
Muscular (paired)

7

which is the only unpaired triangle in anterior triangle?

submental

8

what are the borders of the submental triangle? (lateral, base, apex, floor)

Lateral-anterior bellies of digastric muscles
Base-body of hyoid bone
Apex-symphysis of mandible
Floor-mylohyoid muscles

9

what are the contents of the submental triangle?

submental lymph nodes

10

what are the borders of the submandibular triangle? (anterior/posterior, superior, floor)

Anterior/posterior-anterior & posterior bellies of digastric
Superior-inferior border of mandible
Floor-mylohyoid & hyoglossus muscles, middle pharyngeal constrictor

11

what are the contents of the submandibular triangle?

"Hypo SNiFS"
Hypoglossal nerve (CN XII)
Submandibular gland
Nerve to mylohyoid (branch of trigeminal, CN V)
Facial artery-deep to submandibular gland (vein superficial)
Stylohyoid muscle

12

what are the borders of the carotid triangle? (anterior, posterior, superior)

Anterior-superior belly of omohyoid
Posterior-anterior border of SCM
Superior-posterior belly of digastric

13

what are the contents of the carotid triangle?

"3 Carotid, Bloody Receptive VAJ"
Carotid Arteries: Common, external, & internal
Carotid sinus-dilation of proximal ICA
Carotid body
BaroReceptor & ChemoReceptor
Vagus nerve (CN X)- deep between artery and vein
Ansa cervicalis loop- motor to 3/4 infrahyoid muscles
Jugular Vein (internal)

14

what are the borders of the muscular triangle? (medial, superolateral, inferolateral)

Medial-midline of neck
Superolateral-superior belly of omohyoid
Inferolateral-anterior border of SCM

15

what are the contents of the muscular triangles?

infrahyoid muscles
viscera of neck

16

where are the suprahyoid muscles located? what do they do/form?

Superior to hyoid
Attach hyoid to cranium, elevate hyoid & larynx
Form floor of mouth & support tongue

17

what are the 4 suprahyoid muscles? what are they named for?

-mylohyoid
-geniohyoid
-stylohyoid
-digastric
"top down" names: from superior attachment- down

18

what are the 4 infrahyoid muscles? what are they named for?

-sternohyoid
-sternothyroid
-omohyoid
-thyrohyoid
"bottom up" names: from inferior attachment - up

19

what do the infrahyoid muscles do?

“Strap muscles”
Attach hyoid to manubrium, clavicle, & scapula,
Depress hyoid & larynx

20

mylohyoid: O, I, In

O-inner mandibular body
I-body of hyoid, midline
Nerve to mylohyoid (branch of CN V)

21

geniohyoid: O,I,In

O-inner mandibular apex
I-body of hyoid
Ventral ramus of C1

22

what muscle is deep to mylohyoid?

geniohyoid

23

stylohyoid: O,I,In

O-styloid process
I-body of hyoid
(Wraps around posterior digastric)
Stylohyoid branch of CN VII

24

what muscle wraps around posterior digastric?

stylohyoid

25

the digastric muscle has anterior/posterior bellies joined by what?

joined by intermediate tendon
Separate embryo origins

26

digastric muscle: O,I, In

O-inferior mandibular apex (anterior); mastoid process (posterior)
I-sling at body of hyoid, allows intermediate tendon to slide
Anterior-nerve to mylohyoid (branch of CN V)
Posterior-digastric branch of CN VII

27

sternohyoid: O,I,In

O-manubrium
I-body of hyoid
Ansa cervicalis

28

what are the "bellies" of the omohyoid and what are they joined by?

Superior/inferior bellies, joined by intermediate tendon

29

omohyoid: O,I, In

O-body of hyoid (superior); superior border of scapula (inferior)
I-sling arising from clavicle, allows intermediate tendon to slide
Ansa cervicalis

30

what are the infrahyoid muscles divided into? what is in each group?

superficial: sternohyoid & omohyoid
Deep: sternoTHYROID, THYROhyoid