Clinical Orthopedic

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

The axillary artery starts at the outer border of the ______.

first rib

The second part of the axillary artery is located behind the ______.

Pectoralis minor

The three cords of the brachial plexus enter the axilla above the ______ part of the axillary artery.

first

The cords of the brachial plexus are for the most part located in the ______.

<p>axilla</p> Signup and view all the answers

The cords surround the ______ part of the axillary artery, according to their names.

<p>second</p> Signup and view all the answers

The brachial plexus cords are closely associated with the axillary ______.

<p>artery</p> Signup and view all the answers

The ______ cords give off their branches around the third part of the axillary artery.

<p>brachial</p> Signup and view all the answers

The axillary artery ends at the lower border of the teres ______.

<p>major</p> Signup and view all the answers

The three cords of the brachial plexus ______ the second part of the axillary artery.

<p>embrace</p> Signup and view all the answers

The cords of the brachial plexus give off branches around the ______ part of the axillary artery.

<p>third</p> Signup and view all the answers

Which muscles are innervated by the nerve that arises from the lateral cord and also contains fibers from C5, C6, and C7?

<p>Coracobrachialis and biceps brachii (A)</p> Signup and view all the answers

Which of the following nerves provides cutaneous innervation to the medial side of the forearm?

<p>Medial cutaneous nerve of the forearm (C)</p> Signup and view all the answers

In the majority of cases, which nerve receives a communicating branch from the lateral cord?

<p>Ulnar nerve (C)</p> Signup and view all the answers

Which cord of the brachial plexus gives rise to the upper and lower subscapular nerves?

<p>Posterior cord (B)</p> Signup and view all the answers

Which of the following nerves that originate from the brachial plexus innervates the teres major muscle?

<p>Lower subscapular nerve (B)</p> Signup and view all the answers

A patient presents with weakness in adduction, internal rotation, and extension of the arm. Damage to which nerve is most likely?

<p>Lower subscapular nerve (D)</p> Signup and view all the answers

A patient has lost sensation on the medial side of their forearm, which nerve is most likely damaged?

<p>Medial cutaneous nerve of the forearm (A)</p> Signup and view all the answers

What spinal nerve roots primarily contribute to the formation of the lateral cord of the brachial plexus?

<p>C5, C6, and C7 (B)</p> Signup and view all the answers

What muscles are innervated by the nerves originating from the posterior cord?

<p>Subscapularis and teres major (D)</p> Signup and view all the answers

If the lateral cord is damaged, predict which motion would be most affected due to the innervation of the related musculature:

<p>Forearm supination (C)</p> Signup and view all the answers

The lateral cord (C5, 6, 7) gives off the lateral ______ nerve which supplies the pectoralis major.

<p>pectoral</p> Signup and view all the answers

The lateral cord (C5, 6, 7) gives off the ______ nerve which supplies coracobrachialis and biceps.

<p>musculocutaneous</p> Signup and view all the answers

The lateral cord (C5, 6, 7) gives off the lateral root of the ______ nerve.

<p>median</p> Signup and view all the answers

The medial cord (C8, T1) gives off the medial ______ nerve which supplies pectoralis major.

<p>pectoral</p> Signup and view all the answers

The medial cord (C8, T1) gives off the medial ______ nerve of the arm which supplies the skin over the front and the medial side of the arm.

<p>cutaneous</p> Signup and view all the answers

The medial cord (C8, T1) gives off the medial ______ nerve of the forearm which supplies the skin over the lower part of the arm and the medial side of the forearm.

<p>cutaneous</p> Signup and view all the answers

The medial cord (C8, T1) gives off the medial root of the ______ nerve.

<p>median</p> Signup and view all the answers

The medial cord (C8, T1) gives off the ______ nerve, and in 90% of cases, this nerve receives a branch (C6, 7) from the lateral cord.

<p>ulnar</p> Signup and view all the answers

The posterior cord (C5, 6, 7, 8, T1) gives off the upper ______ nerve (C5, 6), which partly supplies subscapularis.

<p>subscapular</p> Signup and view all the answers

The posterior cord (C5, 6, 7, 8, T1) gives off the lower ______ nerve (C5, 6), which supplies subscapularis and teres major.

<p>subscapular</p> Signup and view all the answers

A patient has difficulty with adduction, extension, and internal rotation of the arm. Which nerve is MOST likely affected?

<p>Thoracodorsal nerve (B)</p> Signup and view all the answers

Which nerve originating from the brachial plexus is responsible for innervating the latissimus dorsi muscle?

<p>Thoracodorsal nerve (A)</p> Signup and view all the answers

Damage to which nerve would MOST directly impact the ability to perform powerful downward strokes, such as chopping wood?

<p>Thoracodorsal nerve (D)</p> Signup and view all the answers

Which of the following nerves receives contributions from all of the following spinal nerve roots: C5, C6, C7, C8, and T1?

<p>Radial nerve (C)</p> Signup and view all the answers

Compared to the axillary nerve, what additional spinal nerve roots contribute to the radial nerve?

<p>C8 and T1 (C)</p> Signup and view all the answers

Assuming no other nerve damage occurred, what combination of arm motions would be MOST weakened following damage to the nerve originating from spinal nerve roots C6, C7, and C8?

<p>Adduction, extension, and internal rotation (C)</p> Signup and view all the answers

A patient has full function of all muscles of the arm except for the latissimus dorsi. Which nerve is MOST likely injured?

<p>Thoracodorsal nerve (C)</p> Signup and view all the answers

Which nerve listed arises from the brachial plexus with the LEAST number of spinal nerve roots represented?

<p>Axillary nerve (B)</p> Signup and view all the answers

A surgeon is performing a procedure in the axilla and needs to identify the nerve responsible for latissimus dorsi innervation. Which of the following is the MOST appropriate target?

<p>The nerve exiting the posterior cord with spinal roots C6, C7, and C8 (D)</p> Signup and view all the answers

If a patient can abduct their arm from 0-15 degrees but loses the ability to do so past 15 degrees, which nerve is MOST likely intact?

<p>The axillary nerve (D)</p> Signup and view all the answers

Flashcards

Axillary artery

The cords of the brachial plexus are closely associated with this artery in the axilla.

Boundaries of the Axillary Artery

Artery that starts at the outer border of the first rib and ends at the lower border of teres major.

Second Part of the Axillary Artery

The part of the axillary artery located behind the pectoralis minor muscle.

Lateral pectoral nerve

A branch of the lateral cord (C5, C6, C7) that supplies the pectoralis major muscle.

Signup and view all the flashcards

Musculocutaneous nerve

A branch of the lateral cord (C5, C6, C7) that supplies the coracobrachialis and biceps brachii muscles.

Signup and view all the flashcards

Lateral root of median nerve

A branch of the lateral cord (C5, C6, C7) and contributes to the formation of the median nerve.

Signup and view all the flashcards

Medial pectoral nerve

A branch of the medial cord (C8, T1) that supplies the pectoralis major muscle.

Signup and view all the flashcards

Medial cutaneous nerve of the arm

A branch of the medial cord (C8, T1) that provides sensation to the skin on the medial side of the arm.

Signup and view all the flashcards

Medial cutaneous nerve of the forearm

A branch of the medial cord (C8, T1) that provides sensation to the skin on the medial side of the forearm.

Signup and view all the flashcards

Medial root of the median nerve

A branch from the medial cord (C8, T1) that contributes to forming this nerve.

Signup and view all the flashcards

Ulnar nerve

Arises from the medial cord (C8, T1), but commonly receives a branch (C6, C7) from the lateral cord.

Signup and view all the flashcards

Upper subscapular nerve

A branch of the posterior cord (C5, C6) and supplies the subscapularis muscle.

Signup and view all the flashcards

Lower subscapular nerve

A branch of the posterior cord (C5, C6) that supplies the subscapularis and teres major muscles.

Signup and view all the flashcards

Thoracodorsal Nerve

Nerve originating from C6, C7, and C8, responsible for innervating the latissimus dorsi muscle.

Signup and view all the flashcards

Radial Nerve

Spinal nerve roots C5, C6, C7, C8, and T1, with a role in motor control and sensation in the arm and hand.

Signup and view all the flashcards

Axillary Nerve

Nerve emerging from spinal nerve roots C5 and C6, serving muscles and skin around the shoulder.

Signup and view all the flashcards

Capital of France (example flashcard)

Paris

Signup and view all the flashcards

Study Notes

  • The thoracodorsal nerve (C6, 7, 8) supplies the latissimus dorsi muscle
  • The radial nerve originates from C5, 6, 7, 8, and T1
  • The axillary nerve originates from C5 and C6

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Use Quizgecko on...
Browser
Browser