Muscles of the Back and Upper Limb Flashcards

1
Q

Origin of Trapezius muscle

A

C7-T12, Nuchal line, Occipital protuberence, ligament nuchae

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2
Q

Insertion of Trapezius

A

Acromion, Spine of scapula and Clavicle

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3
Q

Innervation of Trapezius

A

Cranial nerve 9

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4
Q

Action of Trapezius

A

Extend, Depress and retracts, rotates scapula

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5
Q

Origin of Latissimus dorsi

A

Iliac crest, inferior three ribs, T7-L5

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6
Q

Insertion of Latissimus dorsi

A

Humerus

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7
Q

Innervation of Latissimus dorsi

A

Thoracodorsal or medial sub-scapular nerve

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8
Q

Action of Latissimus dorsi

A

Adduct, extend and medially rotates humerus at shoulder

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9
Q

Levator scapulae origin

A

Transverse process of C1-C4

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10
Q

Levator scapulae insertion

A

Medial border of scapula

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11
Q

Levator scapulae innervation

A

Dorsal scapula n and C3-C4 n

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12
Q

Levator scapulae action

A

Elevates scapula and rotates it (by tilting glenoid cavity inferiorly)

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13
Q

Rhomboid major and minor origin

A

Minor: Ligamentum niche, C7-T1
Major: T2-T5

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14
Q

Rhomboid major and minor innervation

A

Dorsal scapular n

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15
Q

Rhomboid major and minor insertion

A

Medial border of scapula

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16
Q

Rhomboid major and minor action

A

Retracts scapula and rotates it to depress glenoid cavity. Fixes scapula to thoracic wall

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17
Q

Deltoid origin

A

Clavicle, Acromium, Spine of scapula

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18
Q

Deltoid insertion

A

Deltoid tuberosity on humerus

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19
Q

Deltoid innervation

A

Axillary nerve (C5-C6)

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20
Q

Deltoid action

A

Anterior part: Flexes and medially rotates
Middle part: Abduct
Posterior part: Extend and laterally rotates arm at shoulder

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21
Q

Teres major origin

A

inferior angle scapula

22
Q

Teres major insertion

23
Q

Teres major innervation

A

lower sub scapular n (C5-C6)

24
Q

Teres major action

A

adducts arm and medially rotates shoulder

25
Q

Serratus anterior origin

A

upper eight ribs

26
Q

Serratus anterior insertion

27
Q

Serratus anterior action

A

rotates and protracts scapular, pulls it anteriorly to thoracic wall

28
Q

Serratus anterior innervation

A

long thoracic n

29
Q

Subclavius origin

A

junction between costal cartilage and 1st rib

30
Q

Subclavius insertion

31
Q

Subclavius innervation

A

subclavius (C5-C6)

32
Q

Subclavius action

A

depress and anchors clavicle

33
Q

Pectoralis major origin

A

Clavicle, Sternum, Costal cartilages; aponeurosis of external abdominal oblique

34
Q

Pectoralis major insertion

35
Q

Pectoralis major innervation

A

lateral (C5-C7) and medial pectoral (C8-T1)

36
Q

Pectoralis major action

A

Flexes, adducts and medially rotates arm at shoulder

37
Q

Pectoralis minor origin

A

3rd to 5th ribs and deep fascia

38
Q

Pectoralis minor insertion

A

Coracoid process of scapula

39
Q

Pectoralis minor innervation

A

medial pectoral nerve (C8-T1)

40
Q

Pectoralis minor action

A

depresses and protracts scapula

41
Q

Capsule and Articular disc

A

Surrounds acromioclavicular joint
Allows gliding and sliding movement when arm is raised and rotated

42
Q

Coracoclavicular ligament

A

Between the coracoid process and the clavicle
Reinforces the joint by stabilizing the clavicle

43
Q

Acromioclavicular joint

A

Between the acromium and the clavicle
Supports the joint superiorly

44
Q

Fibrous capsule of glenohumeral joint

A

Surrounds joint. Permits abduction, adduction, flexion, extension, circumduction. Most commonly dislocated joint

45
Q

Glebohumeral ligament

A

Has middle, inferior and superior thickenings
Glenoid cavity to humerus

46
Q

Coracohumeral

A

Between the coracoid process and greater tubercule of humerus

47
Q

Transverse humeral

A

Spans the greater and lesser tubercle of humerus
Holds long head of biceps tendon in intertubercular groove

48
Q

Glenoid labrum

A

Fibrocartilagionous ligament that deepens glenoid cavity
Margin of glenoid cavity of scapula

49
Q

Subacromial

A

Between the coracoacromial arch and suprascapular muscle

50
Q

Subdeltoid

A

Between the deltoid muscle and capsule

51
Q

Subscapular

A

Between subscapularis tendon and scapular neck