Blood Supply - Ch. 27 (copy)

What is the main supply of blood to the brain?

Common carotid artery

What components make up the Major Neurovascular Bundle?

• Vagus nerve

• Internal jugular veins

• Common carotid arteries

The jugular vein __________ with pressure.

Collapses

How many superior branches are there off the external carotids?

2

How many inferior branches are there off the subclavian origin?

2

Where do the superior thyroid arteries originate from?

External carotids

Where do the inferior thyroid arteries originate from?

Subclavian vein origin

Where does the superior thyroid branch of the external carotids course?

Superficially over the anterior border of the upper pole

The superior branch of the external carotid artery divides into?

• Anterior branch - curves toward the isthmus to anastomose with the contralateral artery

• Posterior branch - runs down the back of the lobe to anastomose with an extending branch of the inferior thyroid artery

What does the inferior thyroid artery supply?

Lower half of the thyroid gland

Which artery is the largest branch of the thyrocervical branch?

Inferior thyroid artery

What does anastomosing mean?

Cross-connection between adjacent channels, tubes, fibers, or other parts of a network

Where does the inferior thyroid artery course?

• Ascends to the inferior pole of the gland and divides into several branches

  • Anastomosing posteriorly with the superior thyroid branches

Where do the superior thyroid veins arise from?

• Above the anterolateral surface of the gland

• Cross the CCA

• Empty into the IJVs above the thyroid cartilage

Where does the inferior thyroid veins arise from?

• The venous plexus of the thyroid gland

• Communicate with the superior and middle thyroid veins

• Empty into the L & R innominate veins

Where does the middle thyroid veins arise from?

• The venous plexus on the lateral surface of the gland

• Empty into the lower end of the internal jugular vein

Where are the thyroid vessels best seen?

At the upper and lower poles of the glands

The IJV passes deep to the ____________________ / _________________ muscles

Sternocleidomastoid / Strap muscles

The IJV & CCA is found within the _____________

Carotid Sheath

The IJV is found ___________ to the CCA.

Laterally

The CCA is found _________ to the IJV.

Medially

The CCA is found _________ & ________________ to the thyroid gland.

Lateral & slightly posterior

The CCA bifurcates into the __________ & _____________ Arteries.

External and Internal

The Internal Carotid Artery is a __________ of the CCA.

Continuation

The internal carotid artery supplies the ….

Brain

The Internal Carotid Artery is found ____________ to the External Carotid Artery

Posterior

The External Carotid Artery is found ____________ to the Internal Carotid Artery

Anterior

External Carotid Artery is a branch of the _________ artery.

Common

The external carotid artery supplies the ….

Face and external to the skull