24 Questions
At what level does the common carotid artery terminate?
Upper border of the thyroid cartilage
Which artery arises from the anterior aspect of the external carotid artery?
Facial artery
Where does the left common carotid artery originate from?
Aortic arch
Where does the right common carotid artery arise from?
Brachiocephalic trunk
What is the termination point of the external carotid artery?
In the substance of the parotid gland, behind the neck of the mandible
What structures does the common carotid artery travel with within the carotid sheath?
Internal jugular vein and vagus nerve
The glossopharyngeal nerve originates in which part of the brain?
Medulla oblongata
Which vein drains into the subclavian vein?
External jugular vein
Which artery supplies the inferior surface of the cerebellum?
Posterior inferior cerebellar artery
Where does the anterior spinal artery descend along?
Anterior aspect of the spinal cord
Where does the glossopharyngeal nerve leave the cranium?
Jugular foramen
Which arteries join to form the basilar artery?
Vertebral arteries
What is the function of the tympanic nerve?
Sensory innervation to the middle ear
Where does the posterior auricular vein and retromandibular vein combine?
Immediately posterior to the angle of mandible
At which level does the sternal angle (Angle of Louis) lie?
Opposite the intervertebral disc between the fourth and fifth thoracic vertebrae
Which rib only articulates with T10 and has one articular facet?
10th rib
Which muscle is considered as the most important muscle of the thoracic wall?
Diaphragm
Which part of the rib articulates with the vertebral bodies?
Head of the rib
At what level does the xiphisternal joint lie?
Opposite the body of the ninth thoracic vertebra
What is the primary component of normal respiration?
External intercostal muscle
Which muscle forms the lateral part of the innermost layer of the thoracic wall?
Innermost intercostal muscle
Which nerve is joined to the brachial plexus?
First intercostal nerve (T1)
Which nerve receives a gray ramus from the corresponding ganglion of the sympathetic trunk?
First intercostal nerve (T1)
What type of branch does the intercostal nerve give to a ganglion of the sympathetic trunk?
White ramus communicants
Study Notes
Common Carotid Artery
- Terminates at the level of the fourth cervical vertebra (C4).
- Travels with the internal jugular vein and vagus nerve within the carotid sheath.
External Carotid Artery
- The superior thyroid artery arises from the anterior aspect of the external carotid artery.
- Terminates by bifurcating into the maxillary and superficial temporal arteries.
Common Carotid Artery Origins
- Left common carotid artery originates from the arch of the aorta.
- Right common carotid artery arises from the brachiocephalic trunk.
Glossopharyngeal Nerve
- Originates in the medulla oblongata of the brain.
- Leaves the cranium through the jugular foramen.
Arteries and Veins
- The basilar artery is formed by the union of the two vertebral arteries.
- The artery that supplies the inferior surface of the cerebellum is the posterior inferior cerebellar artery.
- Subclavian vein is drained by the external jugular vein.
Veins
- The posterior auricular vein and the retromandibular vein combine to form the external jugular vein.
Thoracic Anatomy
- The sternal angle (Angle of Louis) lies at the level of the second rib.
- Rib 10 articulates only with the T10 vertebra and has one articular facet.
- The primary muscle of the thoracic wall is the pectoralis major.
- The part of the rib that articulates with the vertebral bodies is the head of the rib.
- The xiphisternal joint lies at the level of the ninth thoracic vertebra (T9).
- The primary component of normal respiration is the diaphragm.
Intercostal Nerve
- The lateral part of the innermost layer of the thoracic wall is formed by the internal intercostal muscle.
- Intercostal nerve receives a gray ramus from the corresponding ganglion of the sympathetic trunk.
- Intercostal nerve gives a white ramus communicantes to the sympathetic trunk's ganglion.
Brachial Plexus
- The nerve that is joined to the brachial plexus is the long thoracic nerve.
Test your knowledge on the origin, course, and termination of the common carotid artery in the neurovasculature of the head and neck.
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