Anatomy

1. Head and
neck arteries
Part -1

2. Head and neck arteries
Two aterial systems supply head and neck
1.carotid system
Supply
Upper neck and
head
2.Subclavian
system
 Supply
Lower neck
 Deep neck
 Inside of cranium
 Shoulder
 Upper limb
 thorax

3. Subclavian artery

5. 1.carotid system
 Begins with two common carotid arteries
(left and right)
 Having different origin
 Right common carotid artery arise from
branchiocephalic artery behind
sternoclavicular joint
 left common carotid artery arise from arch of
aorta in superior mediastinum

6.  Common carotid artery runs upward through the neck
within carotid sheath (closely related to internal jugular
vein and vagus nerve)

7.  Under cover of anterior border of sternocleidomastoid
muscle
from sternoclavicular joint to the upper margins of thyroid
cartillage

9.  In carotid tringle ( at upper margins of thyroid cartillage) it
devides into external and internal carotid a.

10. Carotid Sinus
 At the point of devision,
The terminal part of c.c.a or the beginning of
internal c.a or The terminal part of c.c.a plus the
beginning/origin of internal c.a shows dilation
 This dilated area called as carotid sinus

11. Carotid Sinus
 Wall of the sinus is thin because of
Relatively thin tunica media
 Thick tunica adventitia (tunica externa)
contains numerous neve endings derived
from glossophyrngeal nerve

13. Function of Carotid Sinus
 Serve as baroreceptor (reflex
pressoreceptor)

14. Carotid body
 Small area
 Lies posterior to the point of bifurcation of
common carotid a.
Or in the angle of bifurcation
 Innervated by glossophyrngeal nerve
(and possibly supplemented by vagus nerve)
 Function=serve as chemoreceptor

15. External carotid artery
 Supplies
1. Structures in neck
2. Face
3. Scalp
4. Tongue and maxilla

16. External carotid artery
 It begins at the upper border of thyroid
cartillage
 Terminates in the substance of parotid gland
Posterior to the mandible by deviding into
maxillary and superficial temporal arteries

18. superior lyrngeal artery
Superior thyroid artery curves downward to the
upper pole of thyroid cartillage and gives off
superior lyrngeal a.
 Pierce thyrohyoid membrane

19.  Superior thyroid artery descends in company
with external lyrngeal artery
 external lyrngeal artery supplies circothyroid
muscle

20. Superior thyroid artery
 Supplies lyrnx and thyroid gland

21. Ascending phyrngeal artery
 Supplies
 The phyrngeal walls

22. Lingual artery
 Supplies
 The Tongue

23. Facial artery
 Supplies
 Tonsils
 Muscle and skin of face
 Submandibular gland

24. Occipital artery
 supplies
 Back of scalp
posterior auricular artery
supplies
Auricles
And scalp

25. Superficial temporal artery
 Supplies Scalp in company with
auriculotemporal nerve( branch of mandibular
devision of trigemminal nerve)

26. Superficial
temporal artery
 Small terminal branch of
external carotid artery
 Ascends over zygomatic
arch

27. Superficial tempora artery can be
palpated just in front of auricle
/ear

28. Maxillary artery
 Supplies
1. The Upper and the lower jaw
2. The Muscles of mastication
3. The Nose
4. The Palate
5. The Meninges inside the skull

29. Maxillary artery
 Larger terminal branch
of external carotid artery
 Runs forward
 Deep to the neck of
mandible(0spe)
 It proceeds across the
infratemporal fossa
 Enters the
pterygopalatine fossa

30. Middle meningeal artery
 Branch of maxillary
artery
 Enters the skull
through foramen
spinosum.runs
laterally and devides
into anterior and
posterior branches