Exam 5 Upper Extremity 51X Flashcards
Name the muscles that are Scapulohumeral Muscles, the intrinsic shoulder muscles?
Deltoid Supraspinatus Infraspinatus Teres Minor Teres Major Subscapularis
Which Scapulohumeral muscle is a multipennate muscle?
Deltoid Muscle
What are the names of the four muscles that make up the rotator cuff (Their tendons form a single tendon unit to form a “cuff” over the head of the Humerus)?
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
What are the functions of the rotator cuff?
- Help lift and rotate arm
- Stabilize Humeral head within glenoid cavity
Which of the Rotator cuff muscles are not a rotator?
Supraspinatus
What does the Coracoacromial ligament, ligament that connects to the Acromion and Coracoid process, prevent from happening?
Superior displacement of Humeral head from glenoid cavity
What separates the tendon from the coracoacromial ligament, acromion, and deltoid muscle?
Subacromial bursa
A patient who has painful abduction of the arm during the arc of 50-130 degrees may be suffering from what?
Subacromial bursitis
-Painful arc syndrome
What provides a passageway for vessels and nerves to reach the upper extremities from the trunk?
Axilla
What the is pyramidal space that lies inferior to the glenohumeral joint and superior to the axillary fascia at the junction of the arm and thorax called?
Axilla
The axilla has an apex, base, and four walls, what does the apex of the axilla allow?
Cervicoaxillary canal: between first rib, clavicle, and superior edge of subsacapularis allows passage of arteries, veins, lymphatics, and nerves to reach the arm
What artery begins at the lateral border of the 1st rib and is a continuation of the subclavian artery?
Axillary Artery
What will the Axillary become when it passes the inferior border of the teres major?
Brachial Artery
The axillary artery, axillary vein, and cords and branches of the brachial plexus associate proximally within a fascial sleeve called?
Axillary Sheath
What divides the Axillary artery into its 3 parts?
Tendon of Pectoralis minor
What is the name of the arterial branch that arises from the 1st part of the axillary artery?
Superior Thoracic Artery
How many branches come off the 2nd part of the Axillary Artery and give the name(s)?
Thoracoacromial Artery
Lateral Thoracic Artery
What are the names of the three branches that arise from the 3rd part of the Axillary Artery?
- Anterior Circumflex Humeral Artery
- Posterior Circumflex Humeral Artery
- Subscapular Artery
What forms the Axillary vein and where does it lie?
- Brachial vein and Basilic vein at inferior border of the teres major.
- Lies medial side of axillary artery
The Musculocutaneous nerve Provides what innervation?
- Flexor muscles of the arm
- Cutaneous: Lateral antebrachial cutaneous nerve
What are the names of the Radial Cutaneous nerve Branches?
- Inferior Lateral Brachial Cutaneous Nerve
- Posterior Brachial Cutaneous Nerve
- Posterior Antebrachial Cutaneous Nerve
What nerve wraps around the surgical neck of the Humerus and what accompanies this nerve?
Axillary Nerve
-Posterior Circumflex Humeral Artery
Which nerve wraps around the shaft of the Humerus and what accompanies this nerve?
Radial Nerve
-Deep Brachial Artery
The Quadrangular Space is a four-sided posterior axilla space formed by what?
- Superiorly: Inferior Border of Teres minor
- Inferiorly: Superior Border of Teres major
- Medially: Long Head of Triceps
- Laterally? Surgical neck of humerus
The Quadrangular Space transmits (contains) what?
- Axillary nerve
- Posterior Circuflex Humeral Artery
- Posterior Circumflex Humeral Vein
Which forearm muscles are innervated by the median nerve?
- Flexor carpi radialis
- Palmaris longus
- Flexor digitorum superficialis
- Flexor pollicis longus
- Flexor digitorum profundus (also ulnar nerve)
Which muscles make up the Thenar muscles and which nerve innervates them??
Abductor pollicis brevis
Opponens pollicis
Flexor pollicis brevis (also ulnar nerve)
Which forearm muscles are innervated by the ulnar nerve?
Flexor carpi ulnaris
Flexor digitorum profundus (also median)
Which intrinsic hand muscles are innervated by the ulnar nerve?
Adductor pollicis Flexor pollicis brevis and lumbricals (also median) and Hypothenar compartment muscles -Abductor digiti minimi -Flexor digiti minimi brevis -Oppenens digiti minimi
What muscles are contained in the Anterior and Posterior compartments of the arm?
Anterior Compartment -Biceps brachii -Brachialis -Coracobrachilais Posterior Compartment -Triceps brachii -Anconeus
Which nerve innervates all muscle of the Anterior Compartment of the arm?
Musculocutaneous Nerve
Name the membranous band from the biceps tendon that crosses the cubital fossa to merge w/ the deep fascia of the flexor muscles of the medial forearm? What is its purpose?
Bicipital Aponeurosis
-To protect structures in the cubital fossa
Which muscle is synergistic to the Biceps brachii in the action of flexion of the forearm?
Brachialis
When is the Bicep most efficient in producing flexion?
- Elbow flexed close to 90 degrees
- Forearm is supinated
Which muscle is always a flexor of the forearm regardless of pronation or supination?
Brachialis muscle
Which muscle of the arm has no action on the forearm?
Coracobrachialis
