Movements of the Arm Flashcards

1
Q

Pectoralis major origin?

A

sternal end of clavicle, sternum, cartilage of ribs 1-6, & aponeurosis of external oblique muscle

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2
Q

Latissimus dorsi origin?

A

indirectly via lumbodorsal fascia into spines of T7-L5, lower 4 ribs & iliac crest

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3
Q

Deltoid origin?

A

lateral 3rd of clavicle, acromion & spine of scapula

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4
Q

Supraspinatus origin?

A

supraspinous fossa of scapula

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5
Q

Infraspinatus origin?

A

infraspinous fossa of scapula

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6
Q

Subscapularis origin?

A

subscapular fossa of scapula

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7
Q

Teres minor origin?

A

lateral border of dorsal scapular surface

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8
Q

Teres major origin?

A

posterior surface of scapula at inferior angle

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9
Q

Coracobrachialis origin?

A

coracoid process of scapula

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10
Q

Pectoralis major insertion?

A

by a short tendon into intertubercular groove of humerus

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11
Q

Latissimus dorsi insertion?

A

floor of intertubercular groove of humerus

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12
Q

Deltoid insertion?

A

deltoid tuberosity of humerus

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13
Q

Supraspinatus insertion?

A

superior part of greater tubercle of humerus

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14
Q

Infraspinatus insertion?

A

greater tubercle of humerus, posterior to supraspinatus

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15
Q

Subscapularis insertion?

A

lesser tubercle of humerus

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16
Q

Teres minor insertion?

A

greater tubercle of humerus, inferior to infraspinatus

17
Q

Teres major insertion?

A

intertubercular groove of humerus, tendon fused with tendon of latissimus dorsi

18
Q

Coracobrachialis insertion?

A

medial surface of humerus shaft

19
Q

Pectoralis major action?

A

prime mover of arm flexion
agonist of arm flexion
rotates arm medially
adducts arm against resistance

20
Q

Latissimus dorsi action?

A

prime mover of arm extension
agonist of arm extension
powerful arm adductor
medially rotates arm & shoulder

21
Q

Deltoid action?

A

Prime mover of arm abduction when it’s fibers contract simultaneously
agonist of arm abduction
antagonist of pectoralis major & latissimus dorsi

22
Q

Supraspinatus action?

A

initiates abduction

stabilizes shoulder joint

23
Q

Infraspinatus action?

A

stabilizes shoulder joint

24
Q

Subscapularis action?

A

Chief medial rotator of humerus

25
Teres minor action?
stabilizes shoulder joint
26
Teres major action?
extends, medially rotates, and adducts humerus | synergist of latissimus dorsi
27
Coracobrachialis action?
flexes and adducts humerus | synergist of pectoralis major
28
Pectoralis major innervation?
Lateral & medial pectoral nerves C5-C8 and T1
29
Latissimus dorsi innervation?
Thoracodorsal C6- C8
30
Deltoid innervation?
Axillary nerve C5- C6
31
Supraspinatus innervation?
Suprascapular nerve
32
Infraspinatus innervation?
Suprascapular nerve
33
Subscapularis innervation?
Subcapular nerve C5- C7
34
Teres minor innervation?
Axillary nerve
35
Teres major innervation?
Lower scapular nerve C6 and C7
36
Coracobrachialis innervation?
Musculocutaneous nerve C5- C7