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ESP SM1 > Anatomy 1 - Back/Chest muscles > Flashcards

Anatomy 1 - Back/Chest muscles Flashcards

1
Q

Origin of sternocleidomastoid?

A
  • Superior anterior surface of manubrium
  • Superior surface of medial third of clavicle
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2
Q

Insertion of sternocleidomastoid?

A
  • Mastoid process of temporal bone (lateral)
  • Nuchal line of occipital bone
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3
Q

Function of sternocleidomastoid?

A
  • Elevation of clavicle and manubirum of sternum (at sternoclavicular joint)
  • F, lateral F, E of neck
  • contralateral rotation of the head
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4
Q

Origin of subclavius?

A

Junction of first rib and its cartilage (costal cartilage)

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5
Q

Insertion of subclavius?

A

Posterior inferior surface of middle third of clavicle

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6
Q

Function of subclavius?

A

Depresses clavicle down and forward at the sternoclavicular joint

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7
Q

Origin of teres major?

A

Inferior angle of scapula

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8
Q

Insertion of teres major?

A

Intertubercular groove of the humerus

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9
Q

Function of teres major?

A
  • E, ADD, IR, horizontal ABd of the arm (humerus) at the shoulder joint
  • Stabilises shoulder/glenohumeral joint
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10
Q

Origin of teres minor?

A

Lateral border of scapula

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11
Q

Insertion of teres minor?

A

Greater tubercle of humerus

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12
Q

Function of teres minor?

A
  • ER, ADD, horizontal ABd of arm at shoulder joint
  • stabilises shoulder/glenohumeral joint
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13
Q

Origin of infraspinatus?

A

Infraspinous fossa of posterior surface of scapula

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14
Q

Insertion of infraspinatus?

A

Greater tubercle of humerus

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15
Q

Function of infraspinatus?

A
  • ER, horizontal ABd of arm at shoulder joint
  • Stabilises shoulder/glenohumeral joint
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16
Q

Origin of supraspinatus?

A

Supraspinatous fossa of scapula

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17
Q

Insertion of supraspinatus?

A

Greater tubercle of humerus

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18
Q

Function of supraspinatus?

A
  • ABd of arm at shoulder joint
  • Stabilises shoulder/glenohumeral joint
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19
Q

Origin of serratus anterior?

20
Q

Insertion of serratus anterior?

A

Medial border of scapula

21
Q

Function of serratus anterior?

A
  • Depression, abduction, upward rotation of the scapula at the scapulothoracic joint
  • Elevation of ribs when scapula fixed
22
Q

Origin of subscapularis?

A

Subscapular fossa of scapula

23
Q

Insertion of subscapularis?

A

Lesser tubercle of humerus

24
Q

Function of subscapularis?

A
  • IR of arm at shoulder/glenohumeral joint
  • Prevents anterior displacement of humerus (stabilises shoulder joint)
25
Q

Origin of levator scapulae?

A

Transverse processes of vertebrae C1-C4

26
Q

Insertion of levator scapulae?

A

Superior part of medial border of scapula

27
Q

Function of levator scapulae?

A

Elevation and downward rotation of scapula at scapulothoracic joint

28
Q

Origin of rhomboid major?

A
  • Spinous processes of vertebrae T2-T5
  • Ligamentum nuchae
29
Q

Insertion of rhomboid major?

A

Medial border of scapula inferior to scapular spine

30
Q

Function of rhomboid major?

A
  • ADD (retraction), downward rotation, elevation of scapula at scapulothoracic joint
  • Stabilises scapula

(like rhomboid minor)

31
Q

Origin of rhomboid minor?

A

Spinous processes of vertebrae C7-T1

32
Q

Insertion of rhomboid minor?

A

Medial border of scapula superior to scapular spine

(above rhomboid major)

33
Q

Function of rhomboid minor?

A
  • ADD (retraction), downward rotation, elevation of scapula at scapulothoracic joint
  • Stabilises scapula

(like rhomboid major)

34
Q

Origin of trapezius?

A
  • Occipital bone
  • Ligamentum nuchae
  • Spinous processes of vertebrae C7-T12
35
Q

Insertion of trapezius?

A
  • Posterior lateral third of clavicle
  • Acromion
  • Spine of scapula
36
Q

Function of trapezius?

A
  • Superior fibers: elevation, upward rotation of scapula
    : E, lateral flexion of neck
  • Middle fibers: ADD of scapula
  • Lower fibers: depression and upward rotation of scapula
37
Q

Origin of pectoralis major (clavicular, sternocostal, abdominal part)?

A
  • Anterior surface of medial half of clavicle
  • Anterior surface of sternum
  • Anterior layer of rectus sheath
38
Q

Insertion of pectoralis major (clavicular, sternocostal, abdominal part)?

A

Lateral lip of the intertubercular groove of the humerus

39
Q

Function of pectoralis major (clavicular, sternocostal, abdominal part)?

A
  • Clavicular head (upper part):
    ADD, IR, F of arm at shoulder joint
  • Sternocostal head (lower part):
    E of arm at shoulder joint
    Depression, downward rotation, ABD of scapula
40
Q

Origin of pectoralis minor?

A

Ribs 3-5 (costal cartilages)

41
Q

Insertion of pectoralis minor?

A

Coracoid process of scapula

42
Q

Function of pectoralis minor?

A
  • Depression, downward rotation, ABd of scapula
  • Elevation of ribs
  • Stabilises scapula on thoracic wall
43
Q

Origin latissimus dorsi?

A
  • Spinous processes of vertebrae T7-T12 and L1-L5 and sacrum
  • Thoracolumbar fascia
  • Ribs 9-12
  • Inferior portion of scapula
  • Posterior third of iliac crest
44
Q

Insertion latissimus dorsi?

A

Intertubercular groove of humerus (btw pectoralis and teres major)

45
Q

Function latissimus dorsi?

A
  • IR, ADD, E of arm at shoulder joint
  • Lateral flexion of spine

ESP SM1 (7 decks)

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