2 - Aldridge - Arm + Scapular Region Flashcards
Clinical presentation of damage to humerus (fracture) at midshaft?
What does it not affect?
Wrist Drop
Not significantly affect extension of arm at elbow joint
Cubital Fossa
Borders
Contents
Borders:
Horizontal - Medial / Lateral epicondyls of humerus
Lateral - Brachioradialis
Medial - Pronator teres
Contents:
- Biceps Brachii Tendon
- Brachial Artery
- Median Nerve
(TAN)
Site for stethoscope for blood pressure assessment
Venipuncture location?
What “protects” the arteries beneath?
Median Cubital Vein at Cubital Fossa
Bicipital Aponeurosis
Rotator Cuff muscles
Infraspinatus (greater tubercle)
Supraspinatus (greater tubercle)
Teres Minor (greater tuberlce)
Subscapularis (lesser tubercle)
Muscle that starts abduction?
Supraspinatus
0-15 degrees
Painful Arc Syndrome
Inflammation of subacromial bursa
70-120 degrees
Stages of Abduction of Arm
0-15
Supraspinatus
15-120
Deltoid
>90
Rotation of scapula by Serratus Anterior and Trapezius
Most commonly torn tendon of rotator cuff?
Supraspinatus Tendon
Can’t initiate abduction of arm, possible dislocation of glenohumeral joint
Calcium depositied in degenerative–eventually tear bursa, dumping down into joint cavity
Quadrangle Space
Allows pasage of neurovascular supply from axilla to posterior scapular and arm regions
Contains:
Axillary Nerve
Posterior Circumflex Humeral Artery
Damage to Axillary nerve?
Can be caused by break in head of humerus or dislocation of humerus
Results in weakends abduction of arm (15-120) and loss of cutaneous innervation to upper lateral arm
Triangular Interval
Allows for passage of neurovascular supply from axilla to posterior scapular and arm regions
Contains:
Radial Nerve
Deep Brachial Artery
Damage to radial nerve?
Can be caused by break in mid-shaft of humerus
Results in wrist drop and sensory loss of dorsum of hand
Triangular Space
Passage for Circumflex Scapular Artery
Anastomosis Around Shoulder Joint
Formed from branches of thyrocervical trunk of subclavian, uniting with subscapular branch of the 3rd part of axillary artery
Creates bypass for Axillary Artery
In the event subclavian is tied/torn/blocked, how does blood still reach the upper limb?
Suprascapular and transverse cervical arteries to the subscapular artery to enter axillary artery
What area can ligations of the subclavian/axillary be made?
Anywhere between the thyrocervical trunk and subscapular artery
Suprascapular Nerve
Branch of upper trunk (C5, C6)
Innervates supraspinatus / infraspinatus
