Carotid Triangle: Common Carotid Artery

Question 1

Origin

Answer 1

Right: in neck
From brachiocephalic artery behind right sternoclavicular joint
Left: in thorax
From aortic arch behind manubrium sterni

Question 2

Course

Answer 2

Ascends in carotid sheath medial to IJV and vagus nerve

Question 3

Termination

Answer 3

At upper border thyroid cartilage (disc between C3 and C4) by dividing into ICA and ECA

Question 4

Surface anatomy of carotids

Answer 4

1. Line from sternoclavicular joint to point midway between mandible angle and mastoid process
2. This line represents CCA and ICA point in this line corresponding to thyroid cartilage upper border is junction between them

Question 5

Relations: anterior

Answer 5

Muscles:
1. Infrahyoid
2. Sternomastoid
Gland:
1. Thyroid lobe

Question 6

Relations: posterior

Answer 6

Muscles:
1. Cervical vertebrae muscle
2. Prevertebral muscles
Arteries:
1. Inferior thyroid artery
2. Vertebral artery
Nerves:
1. Sympathetic trunk
2. Right recurrent laryngeal nerve

Question 7

Relations: medial

Answer 7

Above:
1. Larynx
2. Pharynx
Below:
1. Trachea
2. Esophagus
With laryngeal nerve in between

Question 8

Relations: lateral

Answer 8

IJV