Muscle OIA's Flashcards

1
Q

Pectoralis Major

A

O: medial clavicle, sternum, and costal cartilages of the ribs
I: inter-tubercular groove-lateral lip
A: flexes the shoulder, adducts and medially rotates the humerus

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2
Q

Pectoralis Minor

A

O: ribs 3-5
I: coracoid process of the scapula
A: pulls scapula anteriorly and inferiorly / if scapula is fixed, elevates ribs

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3
Q

Trapezius

A

O: Superior nuchal line, external occipital protuberance, ligamentium niche, spinous processes of C7 and all thoracic vertebrae
I: lateral clavicle, acrimonious process and spine of the vertebrae
A: adducts scapula, elevates and rotates shoulder upward / if scapula is fixed, draws the head backward (hyperextends)

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4
Q

Latissimus Dorsi

A

O: lower thoracic and lumbar vertebrae and lumbodorsal fascia (thoracolumbar fascia / aponeurosis)
I: Inter-tubercular groove
A: extends the shoulder, adducts and medially rotates the humerus

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5
Q

Serratus Anterior

A

O: anterior superior surface of the first 8 or 9 ribs
I: anterior surface of vertebral border of scapula
A: holds scapula to chest wall, rotates scapula so shoulder moves upward

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6
Q

Rhomboids Major

A

O: spinous process of C7 and T1 vertebrae
I: vertebral border of scapula at base of spine
A: adducts scapula, rotates the scapula so shoulder moves downward

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7
Q

Deltoid

A

O: lateral clavicle, acrimonion process and sine of scapula
I: deltoid tuberosity
A: flexes and extends shoulder; abducts humerus

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8
Q

Rotator Cuff Mnemonic

A

SITTS

  • Supraspinatus
  • Infraspinatus
  • Teres Minor
  • Teres Major
  • Subscapularis
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9
Q

Supraspinatus

A

O: supraspinous fossa
I: greater tubercle of the humerus
A: abducts the humerus

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10
Q

Infraspinatus

A

O: infraspinous fossa
I: greater tubercle of the humerus
A: laterally rotates the humerus

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11
Q

Teres Minor

A

O: axillary border of scapula above teres major
I: greater tubercle of the humerus
A: laterally rotates the humerus

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12
Q

Teres Major

A

O: inferior axillary border of scapula
I: intertubercular groove (medial lip)
A: extends the shoulder, adducts an medially rotates humerus

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13
Q

Subscapularis

A

O: subscapular fossa
I: lesser tubercle of humerus
A: adducts and medially rotates the humerus

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14
Q

Triceps

A

(Three Heads)
O: below the glenoid fossa (long head) and posterior shaft of the humerus (other 2 heads)
I: olecranon process of the ulna
A: extends shoulder and elbow

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15
Q

Biceps Brachii

A

(Two Heads)
O: coracoid process (short head) and above the glenoid fossa (long head)
I: radial tuberosity
A: extends shoulder and elbow, supinates forearm and hand

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16
Q

Coracobrachialis

A

O: coracoid process of the scapula
I: proximal medial humerus
A: flexes shoulder and adducts the humerus

17
Q

Brachialis

A

O: distal anterior surface of the humerus
I: coronoid process of the ulna
A: flexes elbow

18
Q

Brahioradialis

A

O: ridges superior to the lateral epicondyle of the humerus
I: radial styloid process
A: flexes elbow

19
Q

Pronator Teres

A

O: medial epicondyle of the humerus
I: lateral surface of the mid shaft of the radius (distal of the insertion of the supinator
A: pronates forearm and hand, flexes elbow

20
Q

Flexor Carpi Radialis

A

O: medial epicondyle of the humerus
I: base of the 2nd and 3rd metacarpals - anterior aspect
A: flexes elbow, flexes and abducts wrist

21
Q

Palmaris Longus

A

O: medial epicondyle of the humerus
I: palmar aponeurosis
A: tenses palmar aponeurosis, flexes elbow and wrist

22
Q

Flexor Digitorum Superficialis

A

O: medial epicondyle of the humerus, coronoid process of ulna and proximal radius
I: medial phalanges of digits 2-5
A: flexes all joints, except distal, of all fingers; flexes wrist and elbow

23
Q

Flexor Carpi Ulnaris

A

O: medial epicondyle of the humerus
I: base of 5th metacarpal - anterior aspect, pisiform, hamate
A: flexes elbow, flexes and adducts wrist

24
Q

Flexor Digitorum Profundus

A

O: anterior medial surface of the proximal ulna
I: distal phalanges of digits 2-5
A: flexes all joints (including distal) of all fingers, flexes wrist

25
Pronator Quadratus
O: distal anterior ulna I: distal anterior radius A: pronates forearm and hand
26
Flexor Pollicis Longus
A: flexes pollex
27
Extensor Carpi Radialis Longus
O: ridge superior to the lateral epicondyle of the humerus I: base of second metacarpal - posterior aspect A: extends elbow, extends and abducts wrist
28
Extensor Carpi Radialis Brevis
O: lateral epicondyle of the humerus I: base of the 3rd metacarpal A: extends elbow, extends and abducts wrist
29
Extensor Digitorum
O: lateral epicondyle of the humerus I: posterior surfaces of the phalanges of digits 2-5 A: extends elbow, extends and abducts wrist
30
Extensor Digitorum
O: lateral epicondyle of the humerus I: base of the 5th metacarpal - posterior aspect A: extends elbow, extends and adducts wrist
31
Extensor Indicus
A: extends the second digit
32
Extensor Pollicis Longus
A: extends pollex, abducts wrist
33
Extensor Pollicis Brevis
A: extends pollex, abducts wrist
34
Abductor Pollicis Longus
A: abducts pollex
35
Supinator
O: proximal posterior ulna, lateral epicondyle of the humerus I: lateral surface of the radius distal to the radial tuberosity (proximal to pronator teres) A: supinates forearm and hand
36
Palmar Interossei
A: adducts fingers
37
Dorsal Interossei
A: abducts the fingers
38
Lumbricals
A: flex the metacarpophalangeal (MCP) joints, extend the interphalangeal joints (Numbered 1-4 starting with the index finger)