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Anatomy Lab > Muscles Upper Extremity OIA > Flashcards

Muscles Upper Extremity OIA Flashcards

Origin Insertion Action

1
Q

Pectoralis Major

A

O: Medial Clavicle, Sternum and costal cartilages of ribs 2-6
I: Intertubercular groove
A: Flexes, adducts, and medially rotates humerus

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2
Q

Pectoralis Minor

A

O: Ribs 3-5
I: Coracoid process of the scapula
A: pulls scapula forward and downward. If scapula is fixed, it elevates ribs`

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3
Q

Trapezius

A

O: Superiod nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of C7 and all thoracic vertebrae
I: Lateral clavicle, spine and acromion process of the scapula
A: Adducts scapula, elevates and rotates shoulder upward, if the scapula is fixed it draws the head backward.

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4
Q

Levator scapulae

A

Runs from the vertebral border of the scapula to the cervical vertebrae
A: elevates scapula

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5
Q

Latissimus dorsi

A

O: Lower thoracic, lumbar and sacral vertebrae, thoracolumbar fascia
I: Intertubercular groove
A: Extends adducts and medially rotates the humerus

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6
Q

Serratus anterior

A

Runs from the vertebral border of the scapula to the lateral and somewhat anterior surface of the ribs.
A: holds scapula to chest wall, rotates scapula so shoulder moves upward

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7
Q

Rhomboideus major

A

Runs from the vertebral border of the scapula to the spines of the upper thoracic vertebrae
A: adducts scapula, rotates the scapula so shoulder moves downward

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8
Q

Rhomboideus minor

A

Similar to Rhomboideus major

A: adducts scapula, rotates the scapula so shoulder moves downward

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9
Q

Deltoid

A

O: Lateral clavicle, acromion process and spine of scapula
I: deltoid tuberosity
A: flexes, extends and abducts arm

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10
Q

Supraspinatus

A

(supraspinous fossa to greater tubercle of the humerus)

A: abducts the arm

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11
Q

Infraspinatus

A

(infraspinous fossa to greater tubercle)

A: laterally rotates humerus

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12
Q

Teres major

A

(runs from the inferior axillary border of the scapula to the medial side of the intertubercular groove)
A: extends, adducts and medially rotates humerus

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13
Q

Teres Minor

A

(Located superior to the teres major)

A: laterally rotates humerus

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14
Q

Subscapularis

A

(begins in the subscapular fossa and runs to the lesser tubercle)
A: adducts and medially rotates the humerus

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15
Q

Coracobrachialis

A

O: Coracoid process of the scapula
I: Medial Humerus
A: flexes and adducts the humerus

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16
Q

Biceps brachii

A

O: coracoid process and above the glenoid fossa
I: Radial tuberosity
A: flexes arm and forearm, supinates hand

17
Q

Brachialis

A

(Large flat muscle on the arm below the biceps brachii)

A: flexes forearm

18
Q

Triceps

A

O: below the glenoid fossa and posterior shaft of the humerus
I: olecranon process of ulna
A: Extends arm and forearm

19
Q

Brachioradialis

A

O: ridge above the lateral epicondyle of the humerus
I: Styloid process of the radius
A: Flexes forearm

20
Q

Flexor carpi radialis

A

A: Flexes and abducts wrist

21
Q

Flexor carpi ulnaris

A

A: flexes and adducts wrist

22
Q

Flexor Digitorum superficialis

A

A: Flexes fingers, flexes wrist and elbow

23
Q

Flexor digitorum profundus

A

A: Flexes all phalanges of all fingers, flexes wrist

24
Q

Palmaris Longus

A

A: tenses palmar aponeurosis, flexes forearm and wrist

25
Q

Pronator teres

A

(located proximally deep to other muscles in the forearm)

A: Pronates hand

26
Q

Pronator quadratus

A

(located at the distal end of forearm and is flat against the bone)
A: Pronates hand

27
Q

Flexor pollicis longus

A

A: flexes thumb

28
Q

Extensor carpi radialis longus

A

A: extends and abducts wrist

29
Q

Extensor carpi radialis brevis

A

A: Extends and abducts wrist

30
Q

Extensor carpi ulnaris

A

A: Extends and abducts wrist

31
Q

Extensor indicis

A

A: extends and adducts first finger

32
Q

Extensor digitorum

A

A: extends fingers and wrist

33
Q

Extensor pollicis longus

A

A: Extends thumb, abducts wrist

34
Q

Extensor pollicis brevis

A

A: extends thumb, abducts wrist

35
Q

Supinator

A

(Located across the posterior side of the proximal radius and ulna, deep to other muscles of the forearm)
A: Supinates hand

36
Q

Abductor pollicis longus

A

A: Abducts thumb

37
Q

Dorsal interossei

A

A: abduct the fingers

38
Q

Lumbricals

A

A: Flex the metacarpophalangeal joints, extend the interphalangeal joints

Anatomy Lab (7 decks)

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