22 Questions
Which muscle is located in the posterior triangle of the neck?
Omohyoid
Which muscle is located in the posterior triangle of the neck?
Omohyoid muscle
Which veins are located in the posterior triangle of the neck?
External jugular vein, subclavian vein, transverse cervical vein, and suprascapular vein
Which veins are located in the posterior triangle?
External jugular vein, subclavian vein, transverse cervical vein, and suprascapular vein
Where can the subclavian artery be found in the posterior triangle?
Between the scalene muscles
Where can the subclavian artery be found in the posterior triangle?
Under the scalene muscles
What is the potential medical emergency associated with damage to the external jugular vein?
Air entering the vein and stopping blood flow
What can happen if the external jugular vein is damaged?
Air can enter the vein and stop blood flow, leading to a medical emergency
What muscle does the accessory nerve innervate?
Sternocleidomastoid
Which nerve innervates the sternocleidomastoid muscle and crosses the posterior triangle in an inferoposterior direction?
Accessory nerve
Which nerve is included in the cervical plexus that forms within the muscles of the floor of the posterior triangle?
Phrenic nerve
Where does the cervical plexus form?
Within the muscles of the floor of the posterior triangle
What does the cervical plexus provide cutaneous innervation to?
Parts of the neck and scalp
What does the cervical plexus provide innervation to?
Parts of the neck and scalp
Which nerve is included in the cervical plexus?
Phrenic nerve
Which plexus crosses the floor of the posterior triangle?
Brachial plexus
What crosses the floor of the posterior triangle besides the cervical plexus?
The brachial plexus
Which of the following is not located in the posterior triangle?
Carotid artery
Which direction does the accessory nerve cross the posterior triangle?
Inferoposterior
What can happen if the phrenic nerve is damaged?
Breathing can be affected
What is the name of the vein that can be damaged in the posterior triangle?
External jugular vein
Which vein can cause a medical emergency if air enters it?
External jugular vein
Study Notes
- The posterior triangle of the neck contains various muscles, including the omohyoid muscle.
- The external jugular vein, subclavian vein, transverse cervical vein, and suprascapular vein are located in the posterior triangle.
- The subclavian artery can be found in the posterior triangle as it emerges between the scalene muscles.
- Damage to the external jugular vein can lead to a medical emergency due to air entering the vein and stopping blood flow.
- The accessory nerve innervates the sternocleidomastoid and crosses the posterior triangle in an inferoposterior direction.
- The cervical plexus forms within the muscles of the floor of the posterior triangle and includes the phrenic nerve.
- Other branches of the cervical plexus provide cutaneous innervation to parts of the neck and scalp.
- The trunks of the brachial plexus also cross the floor of the posterior triangle.
Test your knowledge of the anatomy of the posterior triangle of the neck with this quiz! From muscles to veins to nerves, this area contains important structures that are essential for proper function of the upper body. This quiz will cover various aspects of the posterior triangle, including its contents and associated clinical considerations. Sharpen your understanding of this complex anatomical region and its significance in the human body.
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