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Anatomy > Lecture 8: Shoulder complex joint > Flashcards

Lecture 8: Shoulder complex joint Flashcards

(110 cards)

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1
Q

Action of supraspinatous

A

Works with deltoid in abduction of humerus, acts with other rotator cuff muscles in stabilizing shoulder joint

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2
Q

Superficial extrinsic muscles include and are innervated by

A 
Trapezius
Latissimus dorsi
Levator scapulae
Rhomboideus major
Rhomboideus minor
Innervated by CN XI/ventral rami
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3
Q

Glenohumeral joint articulating bones

A

Glenoid fossa of scapula

Head of humerous

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4
Q

Pectoralis minor innervation

A

Medial pectoral nerve

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5
Q

Cutaneous branches of dorsal rami penetrate what, supply what

A

Penetrate deep and superficial back muscles

Supply skin on either side of midline of back

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6
Q

Supraclavicular nerves come from? They supply which area

A

Cervical plexus C3-4

Supply skin over the clavicle and the superior-lateral aspect of pectoralis major

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7
Q

Action of teres minor

A

Laterally rotates humerus, helps hold humeral head in place

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8
Q

Levator scapulae innervation

A

Cervical nerves C3-C5 and dorsal scapular nerve

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9
Q

Blood supply of rhomboids

A

Dorsal scapular artery

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10
Q

Action of subclavius

A

Anchors and depresses clavicle

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11
Q

Supraspinatous innervation

A

Suprascapular nerve

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12
Q

Deltoid innervation

A

Axillary nerve

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13
Q

Glenohumeral ligaments

A

Glenohumeral (superior, middle, inferior)
Coracohumeral
Coracoacromial

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14
Q

Lateral coracoclavicular ligament name

A

Trapezoid ligament

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15
Q

Action of levator scapulae

A

Elevates to scapula at the superior angle and assists in the downward rotation of the scapula

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16
Q

Costoclavicular ligament function

A

Serves as axis for elevation and depression and for protraction and retraction
Main check for elevation

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17
Q

Blood supply of serratus anterior

A

Long thoracic artery

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18
Q

Distal attachment of deltoid

A

deltoid tuberosity of humerus

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19
Q

Muscle(s) involved in upward rotation of scapula

A

Serratus anterior

Upper and lower trapezius

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20
Q

Rotator cuff muscles

A

Supraspinatous
Infraspinatous
Teres minor
Subscapularis (SITS)

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21
Q

Blood supply of subscapularis

A

Suprascapular artery

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22
Q

Subscapularis innervation

A

upper and lower subscapular nerves

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23
Q

Articulating bones of sternoclavicular joint

A

Articular notch on sternum
Sternal end of clavicle
First costal cartilage

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24
Q

Teres major innervation

A

Lower subscapular nerve

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25
Nerves supplying the shoulder
Supraclavicular nerves | Cutaneous branches of dorsal rami
26
Blood supply of latissimus dorsi
Thoracodorsal artery and a branch of the subscapular artery
27
Nerve involved in Serratus anterior paralysis
Long thoracic nerve
28
Functional type-sternoclavicular
Dairthrotic | Triaxial
29
Action of deltoid
Flexes, medially rotates, abducts, extends and laterally rotates humerus
30
Proximal attachment of subscapularis
Subscapular fossa of scapula (anterior surface)
31
Scapulohumeral musculature function
Attach the scapula to the humerus, move humerus and shoulder joint and contribute to stabilization of this joint
32
Distal attachment of serratus anterior
Anterior surface of medial border of scapula
33
Subclavius origin
Junction of first rib and costal cartilage 1
34
Innervation of scapulohumeral muscles
Brachial plexus
35
Muscle(s) involved in abduction of scapula
Serratus anterior
36
Infraspinatous blood supplly
Suprascapular artery
37
Action of pectoralis minor
Draws scapula inferiorly and anteriorly against thoracic wall (stabilizes scapula)
38
Trapezius innervated by
CN XI and ventral rami of 3/4th cervical nerves
39
Rhomboids innervation
Dorsal scapular nerve
40
Distal attachment of levator scapulae
Medial border of scapula at level of and above the spine
41
Scapulohumeral muscles include
Deltoid Teres minor Serratus anterior
42
Coracoacromial arch consists of
Acromion process Coracoid process Coracoacromial ligament
43
Innervation of subclavius
Nerve to subclavius
44
Distal attachment of subscapularis
Lesser tubercle of humerus
45
Blood supply of teres major
Circumflex scapular artery
46
Innervation of pectoralis major
Lateral and medial pectoral nerves
47
Acromioclavicular joint- articulating bones
Concave facet on acromion process | Convex facet on lateral end of clavical
48
Distal attachment of infraspinatous
Middle facet of greater tubercle of humerus
49
Infraspinatous innervation
Suprascapular nerve
50
Proximal attachment of deltoid
Lateral third of clavicle, acromion process and spine of scapula
51
Degrees of should abduction contributed by scapulothoracic movment
60 degrees Sternoclavicular joint-40 degrees Acromioclavicular joint- 20 degrees
52
Trapezius muscle actions upper through lower
Upper- elevates scapula (shrug) Middle- adducts scapula Lower- Depresses scapula Upper/lower combo- upwardly rotate scapula
53
Distal attachment of teres minor
Inferior facet of greater tubercle of humerus
54
Structureal type of joint-sternoclavicular
Synovial joint Shallow, saddle Articular disc
55
Contents of quadrilateral space
Axillary nerve | Posterior circumflex humeral artery
56
Action of infraspinatous
Laterally rotates humerus, helps hold humeral head in place
57
Functional type-acromioclavicular joint
Triaxial Diarthrotic Gliding and rotation of scapula on clavicle
58
Degrees of shoulder abduction contributed by glenohumeral joint
120 degrees
59
Most common muscle torn in rotator cuff
Supraspinatous
60
Proximal attachment of teres major
Posterior surface of inferior angle of scapula
61
Proximal attachment of teres minor
Middle part of lateral border of scapula
62
Scapulohumeral rhythm
Refers to relatively uninterrupted movement of upper extermity from dependent position to full abduction
63
Muscle(s) involved in elevation of scapula
Levator scapulae and rhomboids
64
Glenohumeral joint capsule is ___ ____ and allows
Very lax | up to an inch of passive distraction
65
Muscle(s) involved in depression of scapula
Latissimus dorsi
66
Steps in arm abduction- first few degrees of abduction
Supraspinatous
67
Sternoclavicular ligaments
Anterior/posterior sternoclavicular ligaments Costoclavicular ligament Interclavicular ligament
68
Distal attachment supraspinatous
Superior facet of greater tubercle of humerous
69
Shoulder complex components
Scapulothoracic joint | Coracoacromial arch
70
Medial coracoclavicular ligament name
Conoid ligament
71
Action of serratus anterior
Protracts scapula, fixes scapula to thoracic wall, rotates scapula
72
Blood supply of levator scapulae
Dorsal scapular artery
73
Steps in arm abduction- snubbing of head of humerus into glenoid fossa
Rotator cuff muscles
74
Blood supply of trapezius
Dorsal scapular artery
75
Rhomboids action
Adducts scapula, rotates glenoid fossa downward, fixes scapula to thoracic wall
76
Steps in arm abduction- external rotation of humerus
Infraspinatous
77
Insertion of pectoralis minor
Coracoid process
78
Proximal attachment infraspinatous
Infraspinous fossa of scapula
79
Action of teres major
Adducts and medially rotates humerus
80
Teres minor blood supply
Circumflex scapular artery
81
Distal attachments of trapezius- upper through lower
Upper-lateral third of clavicle Middle- Acromion and crest of scapular spine Lower- tubercle of scapular spine
82
Distal attachment of latissimus dorsi
Floor of intertubercular (bicipital) groove
83
Distal attachment of rhomboid
Medial border of scapula from level of the spine inferiorly to the inferior angle
84
Quadrilateral space bounderies
Inferior glenohumeral capusle Teres major Triceps longus Surgical neck of humerus
85
Anterior/posterior sternoclavicular ligaments function
Reinforce the capsule and check anterior posterior movement of clavicular head
86
Proximal attachment of serratus anterior
External surface of lateral parts of ribs 1-8
87
Teres minor innervation
Axillary nerve
88
Nerve involved in Deltoid paralysis
Axillary nerve
89
Structural type-acromioclavicular joint
Synovial | Plane
90
Action of subscapularis
Medially rotates and adducts humerus | Helps hold humeral head in place
91
Superior/inferior acromioclavicular ligaments function
They reinforce the joint capsule | They are weak
92
Muscle(s) involved in downward rotation of scapula
Rhomboids | Levator scapulae
93
Steps in arm abduction -movment of scapula
Serratus anterior clamps scapula to thoracic wall
94
Action of latissimus dorsi muscle
Extends, adducts and internally rotates the humerus
95
Ratio of Glenohumeral rotation contribution to Scapulothoracic rotation contribution
2:1
96
Acromioclavicular ligaments
Superior and inferior acromioclavicular ligaments | Coracoclavicular (trapezoid-lateral, conoid-medial)
97
Blood supply of deltoid
Deltoid branch of thoracoacromial artery
98
Serratus anterior innervation
Long thoracic nerve
99
Supraspinatous blood supply
Suprascapular artery
100
Pectoralis minor origin
Ribs 3-5 near costal cartilages
101
Muscle(s) involved in abduction of shoulder
Middle deltoid | Biceps brachii assists
102
Glenoid labrum
Fibrocartilege meniscus | Deepens articulating surface of glenoid fossa
103
Origin of pectoralis major
Anterior surface of the medial half of the clavicle Anterior surface off the manubrium and body of the sternum Costal cartilages 2-6 Aponeurosis of the external oblique
104
Supraspinatous proximal attachment
Supraspinous fossa of scapula
105
Distal attachment of teres major
Medial lip of intertubercular groove of humerus (crest of lesser tubercle)
106
Latissimus dorsi innervation
Thoracodorsal nerve c6-c8
107
Insertion of subclavius
Inferior surface of middle third of clavicle
108
Coracoclavicular ligament function
Provides joint stability and is stronger than the clavicle itself
109
Pectoralis major insertion
Lateral lip of the intertubercular groove = crest of greater tubercle
110
Action of pectoralis major
Adducts and medially rotates humerus Flexes arm Extends arm from flexed position Draws scapula anteriorly and inferiorly

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