Podcast
Questions and Answers
What is the origin of the right subclavian artery?
What is the origin of the right subclavian artery?
Which of the following arteries is not a branch of the 1st part of the subclavian artery?
Which of the following arteries is not a branch of the 1st part of the subclavian artery?
What is the continuation of the subclavian artery at the outer border of the first rib?
What is the continuation of the subclavian artery at the outer border of the first rib?
How many parts is the subclavian artery divided into by the scalenus anterior muscle?
How many parts is the subclavian artery divided into by the scalenus anterior muscle?
Signup and view all the answers
Which artery is responsible for the blood supply to the brain?
Which artery is responsible for the blood supply to the brain?
Signup and view all the answers
What is the course of the subclavian artery in the root of the neck?
What is the course of the subclavian artery in the root of the neck?
Signup and view all the answers
What is the position of the descending thoracic aorta in the mediastinum?
What is the position of the descending thoracic aorta in the mediastinum?
Signup and view all the answers
Which part of the aorta gives rise to the coronary arteries?
Which part of the aorta gives rise to the coronary arteries?
Signup and view all the answers
What is the level at which the descending thoracic aorta ends?
What is the level at which the descending thoracic aorta ends?
Signup and view all the answers
Which of the following arteries is NOT a branch of the arch of aorta?
Which of the following arteries is NOT a branch of the arch of aorta?
Signup and view all the answers
What is the point of origin of the vertebral arteries?
What is the point of origin of the vertebral arteries?
Signup and view all the answers
What is the continuation of the descending thoracic aorta below the level of T12?
What is the continuation of the descending thoracic aorta below the level of T12?
Signup and view all the answers
Through which opening of the diaphragm does the descending thoracic aorta pass to become the abdominal aorta?
Through which opening of the diaphragm does the descending thoracic aorta pass to become the abdominal aorta?
Signup and view all the answers
What is the name of the artery that supplies the muscles of the back of the neck?
What is the name of the artery that supplies the muscles of the back of the neck?
Signup and view all the answers
What is the destination of the vertebral arteries?
What is the destination of the vertebral arteries?
Signup and view all the answers
What is the origin of the costocervical trunk?
What is the origin of the costocervical trunk?
Signup and view all the answers
What is the function of the vertebral arteries?
What is the function of the vertebral arteries?
Signup and view all the answers
What is the origin of the internal thoracic artery?
What is the origin of the internal thoracic artery?
Signup and view all the answers
Study Notes
Subclavian Artery
- Origin: right side - branch of brachiocephalic artery; left side - branch of arch of aorta in the superior mediastinum
- Course: C-shaped course in root of neck, arches from behind sternoclavicular joint to outer border of 1st rib
- Ending: at outer border of first rib, where it continues as axillary artery
Parts of Subclavian Artery
- Divided into 3 parts by the scalenus anterior muscle:
- 1st part: medial to the muscle
- 2nd part: behind the muscle
- 3rd part: lateral to the muscle
Branches of Subclavian Artery
- From 1st part:
- Vertebral artery
- Thyrocervical trunk
- Internal thoracic artery
- From 2nd part:
- Costocervical trunk
- From 3rd part:
- Usually gives descending scapular artery, which replaces deep branch of transverse cervical artery
Main Arterial Supply of The Thorax
- Descending thoracic aorta
- Subclavian artery
- Internal thoracic artery
Aorta
- Parts of aorta (ascending, arch, and descending aorta) are present in mediastinum
- Descending thoracic aorta ends at level of T12, passing through aortic opening of the diaphragm to become abdominal aorta
Parts of Aorta
- Ascending aorta: in middle mediastinum, gives 2 coronary arteries
- Arch of aorta: in superior mediastinum, gives:
- Brachiocephalic artery
- Left common carotid artery
- Left subclavian artery
- Descending thoracic aorta: in posterior mediastinum, ends at level of T12
- Abdominal aorta: in abdomen, ends as right and left common iliac arteries
Descending Thoracic Aorta
- Position: posterior mediastinum
- Beginning: continuation of arch of aorta at lower border of 4th thoracic vertebra
- Course: descends in front of anterior longitudinal ligament of vertebral column
Vertebral Arteries
- Origin: from 1st part of subclavian arteries
- Course: ascend via transverse foramina of cervical vertebrae from C6 –C1, enter skull via foramen magnum
- Ending: unite to form basilar artery, which lies on anterior surface of pons
- Supplies cervical vertebrae, cerebellum, and spinal cord with blood
Costocervical Trunk
- Short arterial trunk that passes backwards above cervical pleura to neck of 1st rib
- Divides into 2 terminal branches:
- Deep cervical artery
- Superior intercostal artery
Internal Thoracic Artery
- Origin: arises from 1st part of subclavian artery behind sternal end of clavicle
- Branches:
- Musculophrenic artery
- Superior epigastric artery
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the anatomy of subclavian arteries, including their origin, course, and branches. It also explores the vertebral arteries and their role in the circulatory system. Test your knowledge of the human body's vascular system!
