Extremities Part 5 (Upper Muscles) Flashcards
upper extremity: muscles
Identify: Latissimus dorsi
Origin: iliac crest
Insertion: intertubercular groove of the humerus
Action: extends, adducts, medial rotation
Identify: Deltoid
Origin: clavicle, acromion process, spine of scapula
Insertion: Deltoid tuberosity humerus
Action: anterior- flexes and medial rotates
middle part- abducts arm
posterior part- extends and laterally rotates
Identify: Teres major
Origin: Inferior angle and lateral border of scapula
Insertion: crest of lesser tubercle humerus
Action: medially rotation adduction of arm
Identify: Subscapularis
Origin: Subscapular fossa
Insertion: Lesser tubercle humerus
action: extend humerus, adduct and medial rotate arm
Identify: Supraspinatus
Origin: Supraspinous fossa scapula
Insertion: greater tubercle humerus
Action: abducts and laterally rotates humerus
Identify: Infraspinatus
Origin: infraspinous fossa scapula
Insertion: Greater tubercle humerus
Action: lateral rotation arm
Identify: Teres minor
Origin: Superior axillary border scapula
Insertion: greater tubercle humerus
Action: lateral rotation arm
Rotator cuff
-Subscapularis
-supraspinatus
-infraspinatus
-teres minor
holds head of humerus in glenoid cavity
What separates the limbs into compartments?
Deep fascia
What two compartments occur in the brachium?
Anterior (flexor) compartment
Posterior (extensor) compartment
Identify: Coracobrachialis
Origin: coracoid process
Insertion: middle humerus
Action: flex and adduct arm at shoulder joint
Identify: Biceps brachii
Origin: shorthead (medial) - coracoid process
longhead (lateral) - supraglenoid tubercle
Insertion: radial tuberosity
Action: flex elbow (humeroradial joint) supination forearm
Identify: Brachialis
Origin: anterior humerus
Insertion: coranoid process
action: flex elbow (humeroulnar joint)
Identify: Brachioradialis
Origin: lateral supracondylar ridge
Insertion: distal radius
action: flex elbow
Identify: Triceps Brachii
Origin: longhead- infraglenoid tubercle
lateral head- lateral superior humerus
medial head- medial inferior humerus
Insertion: olecranon
Action: extend elbow
Identify: Pronator teres
Origin: medial epicondyle humerus
Insertion: middle lateral radius
Action: pronates forarm
Identify: Pronator quadratus
Origin: distal ulna
Insertion: distal radius
Action: pronates hand
Identify: Supinator
Origin: lateral epicondyle humerus
Insertion: proximal radius
Action: supinates forearm
Identify this group of muscles in the anterior forearm: Flexors
Origin: medial epicondyle
Insertion: carpals, metacarpals, and phalanges
Action: Flex wrist and digits
Identify this group of muscles in the posterior forearm: Extensors
Origin: lateral epicondyle
Insertion: carpals, metacarpals, phalanges
Action: extend wrist and digits
What is another name for the flexor retinaculum of the wrist?
Carpal ligament
The flexor retinaculum of the wrist and the arch of the carpals form what structure?
Carpal tunnel
What group of muscles forms the thick, fleshy mass at the base of the thumb and work to abduct, flex, or oppose the thumb?
Thenar group
What group of muscles forms the small fleshy mass at the base of the fifth digit of the hand and work to abduct, flex, and oppose the 5th digit?
Hypothenar group
Identify: Lumbrical muscles
Origins: flexor tendons
Insertions: dorsal side fingers
Action: flex metacarpophalangeal joints, extend interphalangeal joints
Identify: Dorsal interossei
Origin: Metacarpals
Insertion: proximal phalanx
Action: abducts digits
Identify: Palmar interossei
Origins: metacarpals
Insertions: proximal phalanx
Action: adducts digits
