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Upper Limb Anatomy > Shoulder Muscles > Flashcards

Shoulder Muscles Flashcards

(70 cards)

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1
Q

Deltoid Origin

A

Anterior: Lateral 1/3 of anterior clavicle
Middle: Anterior acromion
Posterior: Inferior edge of spine of scapula

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2
Q

Deltoid Insertion

A

Deltoid tuberosity of humerus

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3
Q

Deltoid Innervation

A

Axillary Nerve

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4
Q

Deltoid Actions

A

Anterior: Flexes and medially rotates arm
Middle: Abducts arm beyond initial 15 degrees
Posterior: Extends and lateral rotates arm

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5
Q

Deltoid Blood Supply

A

Posterior circumflex humeral artery, deltoid branch of thoraco-Acromial artery

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6
Q

Infraspinatus Origin

A

Infraspinatus fossa of scapula and deep fascia

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7
Q

Infraspinatus Insertion

A

Middle facet of greater tubercle of humerus

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8
Q

Infraspinatus Innervation

A

Suprascapular nerve

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9
Q

Infraspinatus Action

A

Lateral rotation of arm ( with teres minor)

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10
Q

Infraspinatus Blood Supply

A

Suprascapular artery

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11
Q

Latissimus Dorsi Origin

A

Spinous processes of T7-L5 vertebrae, thoracolumbar fossa, iliac crest, last 3 ribs

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12
Q

Latissimus Dorsi Insertion

A

Interubercular sulcus of humerus

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13
Q

Latissimus Dorsi Innervation

A

Thoracodorsal nerve

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14
Q

Latissimus Dorsi Actions

A

Extends, adducts, and medially rotates humerus at shoulder

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15
Q

Latissimus Dorsi Blood Supply

A

Thoracodorsal artery, dorsal perforating branches of 9th, 10th, and 11th posterior intercostal, subcostal and 1st 3 lumbar arteries

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16
Q

Levator Scapulae Origin

A

Posterior tubercles of transverse processes C1-C4

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17
Q

Levator Scapulae Insertion

A

Medial border of scapula from superior angle to spine

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18
Q

Levator Scapula Innervation

A

Ventral Rami of C3-C4 and dorsal scapular nerve

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19
Q

Levator Scapulae Main Action

A

Elevates scapula medially, inferiorly rotates glenoid cavity

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20
Q

Levator Scapulae Blood Supply

A

Dorsal Scapular artery, transverse cervical artery, ascending cervical artery

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21
Q

Pectoralis Major Origin

A

Sternal 1/2 of clavicle, sternum to the 7th rib, cartilages of true ribs, aponeurosis of external oblique muscle

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22
Q

Pectoralis Major Insertion

A

Lateral lip of intertubercular sulcus of humerus

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23
Q

Pectoralis Major Innervation

A

Medial and lateral pectoral nerves

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24
Q

Pectoralis Major Main Actions

A

Flexes and adducts the arm, rotates the arm medially

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25
Pectoralis Major blood supply
Pectoral branch of thoracoacromial artery, perforating branches of internal thoracic artery
26
Pectoralis Minor Origin
Outer surface of upper margin of ribs 3-5
27
Pectoralis Minor Insertion
Coracoid process of scapula
28
Pectoralis Minor Innervation
Medial Pectoral nerve
29
Pectoralis Minor main actions
Lowers lateral angle of scapula and protracts scapula
30
Pectoralis Minor Blood Supply
Pectoral branch of thoraco-Acromial and intercostal lateral thoracic artery
31
Rhomboid Major Origin
Spinous process of T2-T5 vertebrae
32
Rhomboid Major Insertion
Medial border of scapula below base of spine of scapula
33
Rhomboid Major Innervation
Dorsal Scapular Nerve
34
Rhomboid Major Main Actions
Flexes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity
35
Rhomboid Major Blood Supply
Dorsal scapular OR deep branch of transverse cervical artery, dorsal perforating branches of the upper 5 or 6 posterior intercostal arteries
36
Rhomboid Minor Origin
Ligamentum nuchae, spines of C7 and T1 vertebrae
37
Rhomboid Minor | Insertion
Medial border of scapula at spine of scapula
38
Rhomboid Minor | Innervation
Dorsal Scapular Nerve
39
Rhomboid Minor | Main Actions
Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity
40
Rhomboid Minor | Blood Supply
Dorsal Scapular OR deep branch of transverse cervical arter, dorsal perforating branches of the upper 5 or 6 posterior intercostal arteries
41
Serratus Anterior | Origin
Lateral surfaces of upper 8-9 ribs
42
Serratus Anterior | Insertion
Costal surface of medial border of scapula
43
Serratus anterior | Innervation
Long Thoracic Nerve
44
Serratus Anterior | Main Actions
Protracts and rotates the scapula and holds it against thoracic wall
45
Serratus Anterior | Blood Supply
Lateral Thoracic Artery
46
Subclavius | Origin
Upper border of 1st rib and its cartilage
47
Subclavius | Insertion
Inferior surface of middle third of clavicle
48
Subclavius | Innervation
Nerve to subclavius
49
Subclavius | Main Actions
Anchors and depresses clavicle
50
Subclavius | Blood Supply
Clavicular branch of thoraco-acromial artery
51
Subscapularis | Origin
Subscapular Fossa
52
Subscapularis | Insertion
Lesser tubercle of humerus
53
Subscapularis | Innervation
Upper and lower subscapular nerves
54
Subscapularis | Main Actions
Medially rotates Arm at Shoulder and Adducts it, helps hold humeral head in glenoid cavity
55
Subscapularis | Blood Supply
Subscapular Artery, lateral thoracic artery
56
Supraspinatus | Origin
Supraspinous fossa of scapula and deep fascia
57
Supraspinatus | Insertion
Superior facet of greater tubercle of humerus
58
Supraspinatus | Innervation
Suprascapular nerve
59
Supraspinatus | Main Actions
Initiates arm abduction, acts with rotator cuff muscles
60
Supraspinatus | Blood Supply
Suprascapular artery
61
Teres Major | Origin
Posterior surface of inferior angle of scapula
62
Teres Major | Insertion
Medial lip of intertubercular sulcus of humerus
63
Teres Major | Innervation
Lower subscapular nerve
64
Teres Major | Main Actions
Adducts and medially rotates arm
65
Teres Major | Blood Supply
Circumflex Scapular artery
66
Teres Minor Origin
Upper 2/3 of posterior surface of lateral border of scapula
67
Teres Minor Insertion
Inferior facet of greater tubercle of humerus
68
Teres Minor | Innervation
Axillary Nerve
69
Teres Minor | Main Actions
Laterally rotates arm
70
Teres Minor | Blood Supply
Circumflex Scapular Artery

Upper Limb Anatomy (1 decks)

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