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Upper and Lower Extremity > Upper Extremity Muscles Origin and Insertion > Flashcards

Upper Extremity Muscles Origin and Insertion Flashcards

1
Q

Subscapularis

origin, insertion and action

A 
o = suprascapular fossa
i = lesser tuberosity of humerus
a = internal rotation (Netter atlas says, internal rotation as well as adduction and extension of arm?)
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2
Q

Supraspinatus

origin, insertion and action

A 
o = supraspinous fossa
i = greater tuberosity of humerus
a = abduction
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3
Q

Infraspinatus

origin, insertion and action

A 
o = infraspinous fossa
i = greater tuberosity
a = external rotation of arm
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4
Q

Teres minor

origin, insertion, action and nerve

A 
o = later border of scapula
i = greater tuberosity of humorous
a = external rotation (weak adduction?)
n = axillary (C5, C6)
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5
Q

Trapezius

origin, insertion and action

A 
o = occipital bone (spinous process of C1-C7)
      aponeurosis at T1-T4 spinous process
      spinous process of T5-T12
i = clavicle
     acromion
    scapular spine
a = elevates, retracts and rotates scapula
      depresses scapula
      tilts head to same side
      rotates head to opposite side
      steadies scapula on thorax
     glenoid cavity superiorly
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6
Q

Pectoralis minor

origin, insertion and action

A

o = ribs 3-5
i = coracoid process
a = lowers scapula laterally and medially
protracts scapula

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7
Q

What are the muscles of the rotator cuff?

A

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

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8
Q

Serratus anterior

origin, insertion and action

A 
o = ribs 1-9
i = medial border of scapula
a = protracts scapula
      rotates scapula
      fixes scapula to chest
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9
Q

Rhomboid minor

origin, insertion and action

A

o = spinous process of C6-C7
i = medial border of scapula above scapular spine
a = retraction
adduction

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10
Q

Rhomboid major

origin, insertion and action

A

o = spinous process of T1-T4
i = medial border of scapula below scapular spine
a = retraction
adduction

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11
Q

Levator scapulae

origin, insertion and action

A

o = transverse process of C1-C4
i = superior angle of scapula
a = elevates scapula
incline neck to same side

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12
Q

Teres major

origin, insertion and action

A 
o = inferior angle of scapula
i = lesser tuberosity of humerus
a = extension
      internal rotation
      adduction
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13
Q

Latissimus dorsi

origin, insertion and action

A 
o = inferior angle of scapula
      ribs 9-12
      illiac crest
      spinous process T7-T12
i = lesser tuberosity of humerus
a = extension
      adduction
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14
Q

Deltoid

origin, insertion, action and nerve

A 
o = acromion
      scapular spine
     clavicle
i = deltoid tuberosity of humerus
a = abduction & adduction
     flexion and extension
     internal and external rotation
n = axillary (C5, C6)
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15
Q

Pectoralis major

A 
o = clavicle
     sternum (costal cartilages 1-6)
    rectus sheath
i = greater tuberosity of humerus
a= adduction
     internal rotation
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16
Q

Coracobrachialis

origin, insertion, action and nerve

A 
o = coracoid process
i = humerus
a = flexion
n = musculocutaneous (C5, C6, C7)
17
Q

Biceps

origin, insertion, action and nerve

A 
o = supraglenoid tubercle of scapula
      coracoid process 
i = radial tuberosity
a = elbow joint: flexion, supination
      shoulder joint: flexion,stabilization of humeral head, abduction and internal rotation of humerus
n = musculocutaneous (C5, C6, C7)
18
Q

Brachialis

orgin, insertion, action and nerve

A 
o = humerus
i = ulnar tuberosity
a = flexion 
n = musculocutaneous (C5, C6, C7)
19
Q

Brachioradialis

origin, insertion, action and nerve

A 
o = distal humerus
i = styloid process of radius
a = flexion, pronation, supination
n = radial nerve (C5, C6)
20
Q

Triceps

origin, insertion, action and nerve

A 
o = infraglenoid tubercle of scapula
      posterior humerus
 i = olecranon of ulna
a = extension 
n = radial (C5, C6)
21
Q

Flexor carpi radialis

origin, insertion, action and nerve

A 
o = medial epicondyle of humerus
i = base of 2nd and 3rd metacarpal
a = flexion
n = median (C5, C6)
22
Q

Extensor carpi radialis longus

orgin, insertion, action and nerve

A 
o = lateral supracondylar ridge of humerus
i = 2nd metacarpal
a = extension
n = radial (C5, C6)
23
Q

Extensor carpi radialis brevis

orgin, insertion, action and nerve

A 
o = lateral epicondyle of humerus
i = 3rd metacarpal
a = extension
n = radial (C7, C8)
24
Q

Flexor carpi ulnaris

origin, insertion, action and nerve

A 
o = medial epicondyle of humerus
i = pisiform
     hamate
     5th metacarpal
a = flexion
n = ulnar (C7-T1)
25
Q

Extensor carpi ulnarus

origin, insertion, action and nerve

A 
o = lateral epicondyle of humerus
i = 5th metacarpal
a = extension
n = radial (C7, C8)
26
Q

Opponens pollicis

origin, insertion, action and nerve

A 
o = trapezium
i = 1st metacarpal
a = opposition
n = median
27
Q

What are the thenar muscles?

Thenar (means “palm of hand”)

A

adductor pollicis
abductor pollicis brevis
flexor pollicis brevis
opponens pollicis

Upper and Lower Extremity (2 decks)

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