Upper Extremity, Snell Flashcards
Base of the breast extends from which ribs
2nd to 6th
Base of the breast extends from which lines
Margin of sternum to midaxillary line
Superficial vs deep fascia: Greater part of mammary gland
Superficial
Part of mammary gland that pierces the deep fascia
Axillary tail
Mammary glands are separated from deep fascia by loose areolar tissue called
Retromammary space
Each mammary gland consists of ___ lobes
15-20
Acts as a small reservoir for secreted milk
Lactiferous sinus
Blood supply of breast (2)
1) Lateral thoracic and thoracoacromial from axillary artery
2) Perforating branches of the internal thoracic and intercostal arteries
Breast lymphatics: Lateral quadrants
Anterior axillary or pectoral nodes
Breast lymphatics: Medial quadrants
Internal thoracic nodes
Bones of the shoulder girdle (2)
1) Scapula
2) Clavicle
Most common fractured bone in the body
Clavicle
Clavicular fracture is MOST COMMONLY due to
Fall on the shoulder or outstretched hand
Clavicle: Articulates medially with (2)
1) Sternum
2) First costal cartilage
Clavicle: Articulates laterally with
Scapula
Clavicle: Convex forward
Medial 2/3
Clavicle: Concave forward
Lateral 1/3
Scapula: Articulates with the clavicle
Acromion
Scapula: Articulates with the head of humerus
Glenoid fossa
Scapula: Medial to the base of the coracoid process
Suprascapular notch
Scapula: Concave anterior surface
Subscapular fossa
Humerus: Articulates with glenoid fossa
Head
Humerus: Immediately below the head
Anatomical neck
Humerus: Below the anatomic neck
Greater and lesser tuberosities
Humerus: Greater and lesser tuberosities are separated from each other by
Bicipital groove
Humerus: Distal to the tuberosities
Surgical neck
Humerus: Roughened area approximately halfway down the lateral aspect of shaft
Deltoid tuberosity
Humerus: Behind and below the deltoid tuberosity
Spiral groove for the radial nerve
Humerus: Articulates with head of radius
Capitulum
Humerus: Articulates with ulna
Trochlea
Humerus: Lies above the capitulum and receives the head of the radius in full flexion of elbow joint
Radial fossa
Humerus: Above the trochlea anteriorly, this receives the ulna during full flexion of elbow joint
Coronoid fossa
Humerus: Above the trochlea posteriorly, this receives the ulna when elbow is fully extended
Olecranon fossa
Upper end vs lower end: Head of radius
Upper
Radius: Articulates with the capitulum of humerus
Upper concave surface of head
Radius: Articulates with the radial notch of ulna
Circumference of head
Radius: Below the neck
Bicipital tuberosity
Radius: Inserts at the bicipital tuberosity
Biceps brachii
Radius: Attaches to the sharp interosseous border at the shaft
Interosseous membrane
Lateral vs medial: Styloid process of radius
Lateral
Radius: Articulates with head of ulna
Ulnar notch
Radius: Inferior surface of lower end articulates with (2)
1) Scaphoid
2) Lunate
Radius: Posterior surface of the lower end
Dorsal tubercle
Radius: Dorsal tubercle is grooved on its medial side by the tendon of
ExPoLo
Ulna: Large upper end that forms the prominence of the elbow
Olecranon process
Ulna: Lies on the anterior surface of the olecranon process
Trochlear notch
Ulna: Below the trochlear notch
Coronoid process
Ulna: On the lateral surface of the coronoid process
Radial notch
Upper vs lower end: Head of ulna
Lower
Medial vs lateral: Styloid process of ulna
Medial
Carpal bones: #
8
Carpal bones: Name in order (lat-med; proximal-distal)
Some Lovers Try Positions That They Can’t Handle
1) Scaphoid (navicular)
2) Lunate
3) Triquetral
4) Pisiform
5) Trapezium
6) Trapezoid
7) Capitate
8) Hamate
Concavity vs convexity: Formed by carpal bones on anterior surface
Concavity
Carpal bones: Attached to the lateral and medial edges anteriorly
Flexor retinaculum
Contents of carpal tunnel (2)
1) Median nerve
2) Long flexor tendons of the fingers
Compressed in carpal tunnel syndrome
Median nerve
Flexor muscle that does not pass beneath the flexor retinaculum
Palmaris longus
Metacarpal bones: Form the knuckles
Heads
Metacarpal bones: Heads articulate with
Proximal phalanges
Phalanges: # per finger
3 except thumb (2)
Shoulder joint: Fibrocartilaginous rim that deepens the glenoid cavity
Glenoid labrum
Shoulder joint: Type of joint
Synovial ball-and-socket
Shoulder joint: Capsule strengthened by tendons of
1) Supraspinatus superiorly
2) Infraspinatus and Teres minor posteriorly
3) Subscapularis anteriorly
Shoulder joint: Stabilizers
Rotator cuff muscles
Shoulder joint: Rotator cuff muscles
SITS
1) Supraspinatus
2) Infraspinatus
3) Teres minor
4) Subscapularis
Shoulder joint, ligament: Strengthen the anterior part of the capsule
Glenohumeral ligaments
Shoulder joint, ligament: Bridges the gap between the greater and lesser tuberosities of humerus and holds tendon of long head of biceps in place
Transverse humeral ligament
Shoulder joint, ligament: Strengthens superior part of the capsule
Coracohumeral ligament
Shoulder joint, ligament: Protects the superior aspect of the joint
Coracoacromial ligament
Shoulder joint: The synovial membrane surrounds the tendon of
Biceps muscle
Shoulder joint: Synovial membrane protrudes forward through the capsule forming a bursa beneath
Subscapularis muscle
Shoulder joint: Weakest part
Inferior
Shoulder joint: Subglenoid dislocation into the quadrangular space can cause damage to what structure
Axillary nerve
Shoulder joint: Axillary nerve injury causes (2)
1) Paralysis of deltoid
2) Loss of skin sensation over lower half of deltoid
3) Weak lateral rotation (teres minor)
Shoulder joint: The quadrangular space contains (2)
1) Posterior humeral circumflex artery
2) Axillary nerve
Shoulder joint relations: Anterior (2)
1) Brachial plexus
2) Axillary vessels
Shoulder joint relations: Inferior
1) Axillary nerve
2) Posterior circumflex humeral vessels
Elbow: Type of joint
Synovial hinge
Elbow, medial vs lateral collateral ligament: Closely related to ulnar nerve
Medial
Elbow: Fracture/dislocation damages what nerve/vessel
Ulnar nerve
Elbow: Muscles that produce flexion
1) Biceps
2) Brachialis
3) Brachioradialis
4) Pronator teres
Elbow: Muscles that produce extension
1) Triceps
2) Anconeus
Elbow: Angle seen when elbow joint is extended and lies between arm and forearm
Carrying angle
Elbow: Carrying angle in males
170
Elbow: Carrying angle in females
167
Elbow relations: Anterior (2)
1) Median nerve
2) Brachial artery
Elbow relations: Medial
Ulnar nerve as it passes behind the medial epicondyle of the humerus
Superior radioulnar joint: Consists of
1) Circumference of radial head
2) Radial notch
3) Annular ligament
Superior radioulnar joint: Forms a collar around the radial head of radius
Annular ligament
Superior radioulnar joint: Pronation (2)
1) Pronator teres
2) Pronator quadratus
Superior radioulnar joint: Supination
1) Supinator muscles
2) Biceps
Supination vs pronation: More powerful
Supination
Inferior radioulnar joint: Components
1) Ulnar head
2) Ulnar notch
Inferior radioulnar joint: Type of joint
Synovial pivot
Inferior radioulnar joint: Shuts off the joint from wrist joint
Articular disc
Wrist joint/Radiocarpal joint: Type
Synovial condyloid
Wrist joint/Radiocarpal joint: Ligament/s that connect/s the styloid process of ulna to triquetral
Medial
Wrist joint/Radiocarpal joint: Ligament/s that connect/s the styloid process of the radius to the scaphoid bone
Lateral
Wrist joint/Radiocarpal joint: Nerve supply
1) Anterior interosseous nerve from median nerve
2) Deep branches of radial and ulnar nerves
Wrist joint/Radiocarpal joint, T/F: Rotation is possible
F
Wrist joint/Radiocarpal joint: Flexion (6)
1) Palmaris longus
2) Flexor carpi radialis
3) Flexor carpi ulnaris
4) Flexor digitorum superficialis
5) Flexor digitorum profundus
6) Flexor pollicis longus
Wrist joint/Radiocarpal joint: Extension (7)
1) Extensor carpi radialis longus
2) Extensor carpi radialis brevis
3) Extensor carpi ulnaris
4) Extensor digitorum
5) Extensor pollicis longus
6) Extensor indicis
7) Extensor digiti minimi
Wrist joint/Radiocarpal joint: Adduction (2)
1) Flexor carpi ulnaris
2) Extensor carpi ulnaris
Wrist joint/Radiocarpal joint relations: Anterior (2)
1) Median nerve
2) Ulnar nerve
Wrist joint/Radiocarpal joint relations: Lateral
Radial artery
Carpometacarpal joints: Type of joint
Synovial gliding