pathophys of upper extremity Flashcards
What is contained in the anterior compartment of the upper arm
Flexor
Musculocutaneous nerve
bicep brachii (flexion, supination)
Brachialis
What are the compartments of the upper arm separated by
fascia
What is contained in the posterior compartment of the upper arm
Extensor
Contains radial nerve
tricep
What symptoms are associated with brachial plexopathy
Weakness
pain
sensory
*all in the upper arm
What are some causes of brachial plexopathy
Trauma
TOS
Tumor invasion
Post operative complication (sternotomy)
Radiation
Where are upper brachial plexus lesions seen
C5, C6
What causes an upper brachial plexus lesion
head being pulled to one side with shoulder depression
-trauma
-difficult delivery
*traction or tearing of the nerve fibers
What is the result of an upper brachial plexus injury
Paralysis of
-supraspinatus
-infraspinatus
-biceps
-brachialis
-coracobrachialis
-deltoid
Where are lower brachial plexus lesions seen
C8, T1
What is the cause of a lower brachial plexus injury
Falling and catching yourself causing a tearing of the nerve
Which nerves are involved with a lower brachial plexus injury
Median and ulnar nerve -> affects functionality of the hand
What are the different types of brachial plexopathy
Avulsion
stretch
rupture
What is important about the surgical neck of the humerus
Where the joint capsule attaches
vascular supply for the humeral head
Where does the subscapularis insert
Lesser tuberosity
What is the major complication that can arise from a fracture of the surgical neck of the humerus
AVN of humeral head
Which arteries could be injured with a supracondylar fracture of the distal humerus
radial, ulnar, or brachial artery
What stabilizes the shoulder
Labrum
Rotator cuff
Glenohumeral ligaments
If there is an injury to the radial artery with a shoulder dislocation, what effects might a patient experience
Weakness and difficulty with extension of the wrist and fingers
What is the purpose of the labrum
Fibrocartilaginous joint that deepens the glenoid fossa and aids in stability