Carotid artery and CN in the neck Flashcards
What are the neurovascular bundles of the head and neck and where are they found?
Carotid sheath - anterior triangle
Subclavian - root of neck
Where does the common carotid artery arise?
From the arch of the aorta.
From the brachiocephalic a. on the right and front he arch on the left
What are the contents of the carotid sheath?
Common carotid and its branches (internal and external carotid - and their branches)
Internal jugular vein
X
What are the contents of the subclavian neurovascular bundle?
Subclavian artery and vein.
Brachial plexus
Where does the subclavian a. arise from?
From brachiocephalic a on the right and from the aortic arch on the left
How does X leave the skull?
Jugular fo.
Main branches of X in the neck?
Pharyngeal
Superior laryngeal
Recurrent laryngeal
Function fo X?
Innervate the thorax
How does spinal part of IX enter the skull?
Fo. magnum
How does spinal part of IX leave skull?
Jugular fo.
What is the route of the cranial part of IX?
Joins X
How does XII leave the skull?
Hypoglossal canal
How does XII interact with an artery?
It crosses the lingual artery
What are the 3 parts of the subclavian artery?
Before, beneath and beyond scalenus anterior
What branches arise from the 1st part of the subclavian artery?
Vertebral a., thyrocervical trunk (inferior thyroid), internal thoracic a.
What is the route of the right recurrent laryngeal?
Wraps around the 1st part of subclavian artery
What is the route of the left recurrent laryngeal?
Wraps around the aortic arch
What muscle does the subclavian artery pass superficially?
Scalenus medius
What bundle of nerve passes under scalenus anterior and over scalenus medius?
Brachial plexus
What unites the 2 lobes of the thyroid gland?
The isthmus
What provides the arterial blood supply to the thyroid gland? Of what are these branches?
Superior and inferior thyroid artery. Inferior = subclavian a (thyrocervical trunk).
Superior = external carotid a
What nerve follows the path of inferior thyroid artery?
Recurrent laryngeal n.
What nerve follows the path of superior thyroid artery?
External laryngeal n.
What do the superior and middle thyroid veins drain into?
Internal jugular vein
What does the inferior thyroid vein drain into?
Brachiocephalic vein
What vein unit to form brachiocephalic vein?
Internal jugular and subclavian vein
