Appendicular Muscles - Upper Limb Flashcards by Kirsten G

Trapezius

Origin: occipital bone & spinous processes
of thoracic vertebrae

Insertion: spine & acromion of scapula
clavicle

Action: elevates, retracts, depresses
scapula & clavicle
- extends neck

Innervation: accessory nerve

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Pectoralis Minor

Origin: anterior & superior surfaces of ribs
3-5 or 2-4
- fascia covering external inter-
costal muscles

Insertion: corocoid process of scapula

Action: - depresses & protracts shoulder
- rotates scapula to move glenoid
cavity inferiorly

Innervation: medial pectoral nerve

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Serratus Anterior

Origin: anterior & superior surfaces of ribs
1-8, 9, or 10

Insertion: anterior surface of vertebral
border of the scapula

Action: holds scapula in place against ribs

Innervation: long thoracic nerve

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Levator Scapulae

Origin: transverse processes of first C1 to C4

Insertion: vertebral border of scapula near
the superior angle

Action: elevates scapula

Innervation: dorsal scapular nerve

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Rhomboid Major

Origin: spinous processes of T2 to T5

Insertion: vertebral border of scapula

Action: keeps scapula in place

Innervation: dorsal scapular nerve

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Deltoid

Origin: clavicle & scapula (acromion &
spine)

Insertion: deltoid tuberosity of humerus

Action: abduction

Innervation: axillary nerve

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Subscapularis

Origin: subscapular fossa

Insertion: lesser tubercle of humerus

Action: medial rotation at the shoulder

Innervation: subscapular nerve

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Coracobrachialis

Origin: corcacoid process

Insertion: meidal margin of shaft of
humerus

Action: adduction & flexion at shoulder

Innervation: musculocutaneous nerve

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Biceps brachii

Origin: short head - coracoid process
long head - supragenoid tubercle

Insertion: radial tuberosity

Action: flexion at elbow & shoulder
supination

Innervation: musculocutaneous nerve

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Pectoralis Major

Origin: cartilages of ribs 2-6
body of STERNUM
inferior & medial portion of clavicle

Insertion: crest of greater tubercle
lateral lip of sulcus of humerus

Action: flexion, adduction, & medial roation
at shoulder

Innervation: pectoral nerve

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Supraspinatus

Origin: supraspinous fossa of scapula

Insertion: greater tubercle of humerus

Action: abduction at shoulder

Innervation: suprascapular nerve

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Infraspinatus

Origin: infraspinous fossa of scapula

Insertion: greater tubercle of humerus

Action: lateral rotation at shoulder

Innervation: suprascapular nerve

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Teres Major

Origin: inferior angle of scapula

Insertion: intertubercular sulcus of humerus

Action: extension, medial rotation, adduction

Innervation: lower subscapular nerve

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Triceps brachii (long head)

Origin: infraglenoid tubercle of scapula

Insertion: olecranon of ulna

Action: extension of elbow
extension & adduction at shoulder

Innervation: radial nerve

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Teres Minor

Origin: lateral border of scapula

Insertion: greater tubercle of humerus

Action: lateral rotation & adduction at
shoulder

Innervation: axillary nerve

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Latissimus dorsi

Origin: - spinous processes of inferior
                thoracic & all lumbar and sacral
                vertebrae
            - ribs 8-12
            - thoracolumbar fascia

Insertion: floor of the intertubercular sulcus

Action: extension, adduction, & medial
rotation at shoulder

Innervation: thoracodorsal nerve

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Brachialis

Origin: distal half of anterior surface of
humerus

Insertion: ulnar tuberosity & coronoid
process

Action: flexion at elbow

Innervation: musculocutaneous nerve

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Brachioradialis

Origin: ridge superior to the lateral
epicondyle of the humerus

Insertion: lateral aspect of styloid process of
the radius

Action: flexion at elbow

Innervation: radial nerve

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Triceps brachii (lateral head)

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Origin: superior, lateral margins of humerus

Insertion: olecranon of ulna

Action: extension at elbow

Innervation: radial nerve

Triceps brachii (medial head)

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Origin: posterior surface of humerus,
inferior to radial groove

Insertion: olecranon of ulna

Action: extension at elbow

Innervation: radial nerve

Pronator teres

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Origin: medial epicondyle of humerus
coronoid process of ulna

Insertion: middle of lateral surface of radius

Action: pronates forearm & hand
flexion at elbow

Inneration: meidan nerve

Supinator

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Origin: lateral epicondyle of humerus
ridge near radial notch of ulna

Insertion: anterolateral surface of radius,
distal to the radial tuberosity

Action: supinate forearm

Innervation: deep radial nerve

Flexor carpi radialis

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Origin: medial epicondyle of humerus

Insertion: metacarpals (2nd & 3rd)

Action: flexion & abduction at wrist

Innervation: median nerve

Flexor carpi ulnaris

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Origin: -medial epicondyle of humerus
-adjacent medial surface of
olecranon & anteromedial portion
of ulna

Insertion: medial metacarpal bones

Action: flexion & adduction at wrist

Innervation: ulnar nerve

Extensor carpi radialis longus

Origin: lateral supracondylar ridge of humerus Insertion: lateral metacarpal bones (2nd) Action: extension & abduction at wrist Innervation: radial nerve

Extensor carpi radialis brevis

Origin: lateral epicondyle of humerus Insertion: metacarpal bone (3rd) Action: extension & abduction at wrist Innervation: radial nerve

Extensor carpi ulnaris

Origin: -lateral epicondyle of humerus -adjacent dorsal surface of ulna Insertion: medial metacarpal bone (5th) Action: extension & adduction at wrist Innervation: deep radial nerve

Adductor pollicis

Action: adduction of thumb Innervation: ulnar nerve

Opponens pollicis

Action: opposition of thumb Innervation: median nerve

Palmaris brevis

Action: moves skin on medial border toward midline of palm Innervation: ulnar nerve

Abductor digiti minimi

Action: abduction & flexion of little finger Innervation: ulnar nerve

Abductor pollicis brevis

Action: abduction of thumb Innervation: median nerve

Flexor pollicis brevis

Insertion: proximal phalanx of thumb Action: flexion & adduction of thumb Innervation: median & ulnar nerves

Flexor digiti minimi brevis

Action: flexion at 5th metacarpophalangeal joint Innervatoin: ulnar nerve

Opponens digiti minimi

Action: -flexion at metacarpophalangeal joint -brings digit into opposition with thumb Innervation: ulnar nerve

Lubrical (4)

Action: -flexion at metacarpophalangeal joint -extension at proximal & distal interphalangeal joints ``` Innervation: median nerve (#1 & #2) ulnar nerve (#3 & #4) ```

Dorsal interosseus (4)

Action: -abduction at metacarpophalangeal joints of digits 2 & 4 -flexion at metacarpophalangeal joints -extension at interphalangeal joints Innervation: ulnar nerve

Palmar interosseus (4)

Action: -adduction at metacarpophalangeal joints of digits 2, 4, & 5 -flexion at metacarpophalangeal joints -extension at interphalangeal joints Innervation: ulnar nerve

Abductor pollicis longus

Origin: proximal & dorsal surfaces of ulna and radius Insertion: lateral margin of 1st metacarpal bone & trapezium Action: abduction at joints of thumb & wrist Innervation: deep radial nerve

Extensor digitorum

Origin: lateral epicondyle of humerus Insertion: posterior surfaces of phalanges, digits 2-5 Action: extension at finger joints & wrist Innervation: deep radial nerve

Extensor pollicis brevis

Origin: -shaft of raidus, distal to the origin of abductor pollicis longus -interosseus membrane Insertion: base of proximal phalanx of thumb Action: -extension at joints of thumb -abduction at wrist Innervation: deep radial nerve

Extensor pollicis longus

Origin: posterior & lateral surfaces of ulna and interosseus membrane Insertion: base of distal phalanx of thumb Action: -extension of thumb -abduction at wrist Innervation: deep radial nerve

Extensor indicis

Origin: posterior surface of ulna & interosseus membrane Insertion: posterior surface of poximal phalanx of index finger Action: extension & adduction at joints of index finger Innervation: deep radial nerve

Extensor digiti minimi

Origin: via tendon to lateral epicondyle of humerus & from intermuscular septa Insertion: posterior surface of proximal phalanx of little finger Action: -extension at joint of little finger -extension of wrist Innervation: deep radial nerve

Flexor digitorum superficialis

Origin: -medial epicondyle of humerus -coronoid process of ulna & adjacent anterior surfaces of ulna & radius Insertion: bases of middle phalanges of digits 2-5 Action: flexion at proximal interphalangeal, metacarpophalangeal, & wrist joints Innervation: median nerve

Flexor digitorum profundus

Origin: -medial & posterior surfaces of ulna -meidal surfaces of coronoid process -interosseus membrane Insertion: bases of distal phalanges of digits 2-5 Action: -flexion at distal interphalangeal joints and to a lesser degree the proximal interphalangeal joints & wrist Innervation: median nerve & ulnar nerves

Flexor pollicis longus

Origin: -anterior shaft of radius -interossseus membrane Insertion: base of distal phalanx of thumb Action: flexion at joints of thumb Innervation: median nerve

Appendicular Muscles - Upper Limb Flashcards

(47 cards)