Brachial Plexus Flashcards by Alexander Lee

Label the 5 parts of the brachiel plexus in order

Rami

Trunk

Divisions

Cords

Branches

How well did you know this?

Not at all

Perfectly

The brachial plexus includes what nerve levels?

C5 to T1, but also gets help from C4

How well did you know this?

Not at all

Perfectly

The brachial plexus eventually becomes ___ periphrial nerves

5 periphrial nerves

musculocutaneous, median, ulnar, axillary, and radial nerves

How well did you know this?

Not at all

Perfectly

The parent structure of the Musculocutaneous nerve is the

Lateral Cord of brachial plexus

How well did you know this?

Not at all

Perfectly

The parent structure of the radial nerve is the

Posterior Cord of brachial plexus

How well did you know this?

Not at all

Perfectly

The parent structure of the axillary nerve is the

Posterior Cord of the brachial plexus

How well did you know this?

Not at all

Perfectly

The parent structure of the median nerve is the

Lateral and Medial cords of the brachial plexus

How well did you know this?

Not at all

Perfectly

The parent structure of the ulnar nerve is the

Medial cord of the brachial plexus

How well did you know this?

Not at all

Perfectly

Identify 3 (it’s a peripheral nerve)

Musculocutaneous Nerve

How well did you know this?

Not at all

Perfectly

Identify 4 (it’s a peripheral nerve)

Axillary Nerve

How well did you know this?

Not at all

Perfectly

Identify 6

Long Thoracic Nerve

How well did you know this?

Not at all

Perfectly

Identify 7

Radial Nerve

How well did you know this?

Not at all

Perfectly

Identify 8

Median Nerve

How well did you know this?

Not at all

Perfectly

Identify 9

Ulnar Nerve

How well did you know this?

Not at all

Perfectly

Identify 1

Posterior Cord

How well did you know this?

Not at all

Perfectly

Identify 2

Subclavian artery

How well did you know this?

Not at all

Perfectly

Identify 3

Lateral cord

How well did you know this?

Not at all

Perfectly

Identify 5

Musculocutaneous nerve

How well did you know this?

Not at all

Perfectly

Identify 6

Median Nerve

How well did you know this?

Not at all

Perfectly

The brachial plexus comes out of the neck between what two muscles?

Anterior and middle scalene

How well did you know this?

Not at all

Perfectly

The anterior scalene AND the middle scalene Inferiorly attaches to the

First rib

How well did you know this?

Not at all

Perfectly

The anterior scalene superiorly attaches to the

TP of C3-6

How well did you know this?

Not at all

Perfectly

The anterior scalene is innervated by

Cervical spinal nerve C4 to C6

How well did you know this?

Not at all

Perfectly

The two muscle actions of the anterior scalene and middle scalene are….

Flex the neck laterally

Elevates the first rib during forced inhalation

How well did you know this?

Not at all

Perfectly

The superior attachment of the middle scalene AND the Posterior scalene is...

TP of C5-7

The posterior scalene inferiorly attaches to the _____ and it's muscle actions are _____

second rib. Elevate the second rib with forced inhalation, and flex the neck laterally

The innervation of the posterior scalene is...

Anterior rami of cervical spinal nerves C7 and C8

Quadrangular Space's four borders include the...

the inferior margin of the teres minor the surgical neck of the humerus the superior margin of the teres major the lateral margin of the long head of the triceps brachii.

The contents of the quadrangular space include

axillary nerve and the posterior circumflex humeral artery

The 3 borders of the triangular space are..

the medial margin of the long head of the triceps brachii the superior margin of the teres major the inferior margin of the teres minor

What two structures run through the triangular space

circumflex scapular artery and vein

What are the borders of the triangular interval

the lateral margin of the long head of the triceps brachii the shaft of the humerus the inferior margin of the teres major

What structures run through the Triangular interval

profunda brachii artery and radial nerve

Will compression of a periphrial nerve present in a dermatome pattern?

No, it will only effect the areas supplied by that specific periphrial nerve

What is the ONLY synovial joint between the axial and appendicular skeleton

Sternoclavicular joint

The main blood supply of the upper extremity is the

Brachial artery

What are the 3 muscles of the flexor compartment?

Biceps brachii Coracobrachialis Brachialis

What nerve Usually pierces coracobrachialis?

Musculocutaneous Nerve

The brachial artery is found in the _____ compartment

Flexor compartment

What are the muscle actions of the Biceps Brachii

Supinates forearm Flexes elbow Short head resists dislocation of shoulder

Where does the Biceps Brachii SHORT HEAD proximally attach

coracoid process of scapula

Where does the Biceps Brachii LONG HEAD proximally attach

supraglenoid tubercle of scapula

what is the clinical sign of a Proximal bicep rupture called?

Popeyes sign sidenote: You do not always need surgery for this, depends on your age.

What is the muscle action of the brachialis

Flexes the elbow in all positions

What is the proximal attachment of the Brachialis

Distal half of anterior surface of humerus

What is the DISTAL attachment of the brachialis

Ulnar tuberosity and coronoid process of ulna

What is the innervation of the brachialis

Musculocutaneous nerve C5 C6 AND a small branch from radial nerve C5 and C7

What is this muscle and the structure it attaches to?

Brachialis, Tuberosity of Ulna

The brachioradialis is innervated by the

Radial nerve C5 (C6) C7

The actions of the brachioradialis are...

Flex the elbow in a mid-pronated position (at the Humero-ulnar joint) Assist to pronate and supinate the forearm when the movements are resisted from end range. (at the humero-radial joint)

What is the proximal attachment of the Brachioradialis

The lateral supra-epicondylar ridge of humerus

What is the distal attachment of the brachioradialis

Lateral Surface of distal end of radius (proximal to syloid process)

What nerve provides motor innervation to all muscles of the anterior upper arm, and sensory information to the skin of lateral forearm

Musculocutaneous

What artery and what nerve is found in the extensor compartment of the upper arm?

Deep Brachial Artery, Radial Nerve (C6 to T1)

What 3 nerves make the M in the Brachial Plexus? Name them from Medial to Lateral.

Most Medial: Ulnar Nerve Median Nerve Most Lateral: Musculocutaneous Nerve

What Rami feed into the Lateral Cord of the Brachial Plexus

C5 C6 and C7

What Rami feeds into the Medial cord of the Brachial Plexus

C8 and T1

True or false: The posterior Cord has connection to every Rami in the brachial plexus.

True. It is fed from the poterior cord of every Division.

What nerves arise from the poserior cord of the brachial plexus?

Lower Subscapular Thoracodorsal Upper Subscapular Additionally: Axillary and Radial Nerve

What nerves arise from the medial cord of the brachial plexus? (not branches)

Medial Antebrachial Cutaneous Nerve Medial Brachial Cutaneous Nerve Medial Pectoral Nerve

What nerves arises from the lateral cord of the Brachial Plexus

Lateral Pectoral Nerve Musculocutaneous Nerve And the Median Nerve

What muscle is innervated by the entire Brachial Plexus Rami?

Pectoralis Major

C8 and T1 supply the _____ cord of the brachial plexus

Medial cord And the Posterior Cord

What is the most lateral nerve of the Brachial Plexus

Musculocutaneous nerve

Identify the sternal and the acromial end of the clavicle