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PHTH 510 > Muscles of the Shoulder > Flashcards

Muscles of the Shoulder Flashcards

1
Q

What is the origin of the trap?

A

Superior nuchal line, occipital protuberance, spinous process of C7-T12

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2
Q

What is the insertion of the trap?

A

the clavicle, acromion and spine of scapula

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3
Q

what innervates the trap?

A

accessory nerve (CN11)

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4
Q

what is the action of the trap?

A

the superior trap elevates the scap, the middle trap retracts the scapula, the inferior trap depresses the scap

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5
Q

what is the origin of the deltoid?

A

inferior spine of the scapula, lateral margins of acromion, anterior border of lateral clavicle

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6
Q

what is the insertion of the deltoid?

A

deltoid tuberosity of the humerus

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7
Q

what innervates the deltoid

A

axillary nerve (C5-C6)

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8
Q

what is the action of the deltoid?

A

anterior delt will flex and medially rotate the arm, middle delt will abduct the arm, the posterior delt with extend and laterally rotate the arm

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9
Q

what is the origin of levator scap?

A

transverse processes of C1-C4 vertebrae

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10
Q

what is the insertion of levator scap?

A

superior angle of scapula

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11
Q

what is the innervation of levator scap?

A

dorsal scapular (C5) and cervical C3,C4 nerves

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12
Q

what is the action of levator scap?

A

elevate the scapula and tilt the glenoid cavity inferiorly by rotating the scapula

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13
Q

what is the origin of rhomboid major

A

spinous process of T2-T5 vertebrae

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14
Q

what is the origin of rhomboid minor

A

spinous process of C7 and T1 vertebrae

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15
Q

what is the insertion of rhomboid minor?

A

medial border of scapula above scapular spine

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16
Q

what is the insertion of rhomboid major?

A

medial border of scapula below scapular spine

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17
Q

what is the action of the rhomboids?

A

retract the scapula and rotate it to depress the glenoid cavity. Also fixes the scapula to the thoracic wall.

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18
Q

what are the superficial muscles of the shoulder?

A

trap, deltoid, levator scap, rhomboids

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19
Q

what are the posterior scap muscles?

A

supraspinatus, infraspinatus, teres minor, teres major, and long head of triceps

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20
Q

what is the origin of the supraspinatus?

A

supraspinatus fossa of the scapula

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21
Q

what is the insertion of the supraspinatus?

A

greater tubercle of the humerus

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22
Q

what innervates the supraspinatus

A

the suprascapular nerve (C5,C6)

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23
Q

what is the main action of the supraspinatus?

A

abduct the arm

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24
Q

what is the origin of infraspinatus?

A

the infraspinatus fossa of the scapula

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25
what is the insertion of the infraspinatus
the greater tubercle of the humerus
26
what is the innervation of infraspinatus
the suprascapular nerve (C5,C6)
27
what is the action of the infraspinatus?
externally rotate the arm
28
what is the origin of teres minor?
the lateral border of the scapula
29
what is the insertion of teres minor?
the greater tubercle of the humerus
30
what is the innervation of teres minor?
the axillary nerve (C5,C6)
31
what is the action of teres minor?
externally rotate the arm
32
what muscles make up the rotator cuff?
supraspinatus, infraspinatus, teres minor, subscapularis
33
what is the origin of teres major
the inferior angle of the scapula
34
what is the insertion of the teres major
intertubercular groove of humerus
35
what is the innervation of the teres major?
lower subscapular nerve (C5,C6)
36
what is the action of teres major?
extension, adduction, and internal rotation of the arm
37
what is the origin of the long head of the triceps?
infraglenoid tubercle on scapula
38
what is the insertion of the long head of the triceps
olecranon of the ulna
39
what is the innervation of the long head of triceps
radial nerve (C6-C8)
40
what is the action of the long head of triceps?
extension of the elbow and arm, adduction of the shoulder
41
what is the origin of the clavicular head of the pec major?
the anterior surface of the clavicle
42
what is the origin of the sternocostal head of the pec major
anterior surface of sternum, first 7 costal cartilages
43
what is the insertion of the pec major?
the lateral lip of intertubecular sulcus of humerus
44
what is the innervation of the pec major?
the clavicular head is innervated by the medial and lateral pectoral nerve (C5,C6) and the sternocostal head is innervated by C7 and T1 spinal nerves
45
what is the action of pec major?
flexion, add, and IR of the arm
46
What is the origin of subclavius
the first rib and its costal cartilage
47
what is the insertion of subclavius
middle 1/3 of clavicle
48
what is the innervation of the subclavius
nerve to subclavius (C5, C6)
49
what is the action of the subclavius
depress the clavicle down and forward
50
what is the origin of pec minor
ribs 3-5
51
what is the insertion of pec minor
coracoid process of scapula
52
what is the innervation of pec minor
medial pectoral nerve (C8-T1)
53
what is the action of pec minor
elevates the ribs and draws the scapula down and medially
54
what is the origin of serratus anterior
1-9 ribs
55
what is the insertion of serratus anterior
the costal surface of medial border of scapula
56
what is the innervation of the serratus anterior
long thoracic nerve (C5-C7)
57
what is the action of serratus anterior?
protraction and retraction of the scapula
58
what is the origin of subscapularis
subscapular fossa
59
what is the insertion of subscapularis
lesser tubercle of humerus
60
what is the innervation of subscapularis
upper and lower subscapular nerves (C5-C6)
61
what is the action of subscapularis
medially rotate and adduct arm
62
what is the origin of latissimus dorsi
spinous process of T7-L1 thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs
63
what is the insertion of latissimus dorsi
intertubecular groove of humerus and inferior angle of scapula
64
what is the innervation of latissimus dorsi
thoracodorsal nerve (C6-C8)
65
what is the action of the latissimus dorsi
adduct, extend, and internally rotate humerus

PHTH 510 (7 decks)

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