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THORAX OCU2024 > Quiz 2: Thorax > Flashcards

Quiz 2: Thorax Flashcards

1
Q

Origin of Diaphragm (Costal)

A

7th-12th ribs (inner surface, lower margin of costal arch)

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2
Q

Origin of Diaphragm (Lumbar)

A

Medial Part: L1-L3 vertebral bodies, intervertebral disks, and anterior longitudinal ligament as right and left crura.

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3
Q

Origin of Diaphragm (Sternal)

A

Xiphoid Process (posterior surface)

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4
Q

Insertion of Diaphragm

A

Central Tendon

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5
Q

Action of Diaphragm

A

Primary muscle for respiration (diaphragmatic/thoracic breathing)

Compresses Abdominal Viscera

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6
Q

Origin of Anterior Scalene

A

C3-C6 (transverse process, anterior tubercle)

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7
Q

Origin of Middle Scalene

A

C1-C2 (transverse processes)

C3-C7 (transverse processes, posterior tubercle)

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8
Q

Origin of Posterior Scalene

A

C5-C7 (transverse processes, posterior tubercles)

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9
Q

Insertion of Anterior Scalene

A

1st rib (anterior scalene tubercle)

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10
Q

Insertion of Middle Scalene

A

1st rib (posterior to groove for subclavian artery)

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11
Q

Insertion of Posterior Scalene

A

2nd rib (outer surface)

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12
Q

Action of the Scalene Muscles

A

With ribs mobile: Elevates upper ribs (inspiration)

With ribs fixed: Flexes cervical spine to same side (unilaterally)

Flexes neck (bilaterally)

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13
Q

Origin of External Intercostal

A

Lower margin of rib to upper margin of lower next rib

Courses obliquely forward and DOWNWARD from costal tubercle to condor-osseus junction

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14
Q

Insertion of External Intercostal

A

Lower margin of rib to upper margin of lower next rib

Courses obliquely forward and DOWNWARD from costal tubercle to condor-osseus junction

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15
Q

Action of External Intercostal

A

Elevate Ribs

Support Intercostal Spaces

Stabilize Chest Wall

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16
Q

Origin of Internal Intercostal

A

Lower margin of rib to upper margin of lower next rib

Courses obliquely forward and UPWARD from costal angle to sternum

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17
Q

Insertion of Internal Intercostal

A

Lower margin of rib to upper margin of lower next rib

Courses obliquely forward and UPWARD from costal angle to sternum

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18
Q

Action of Internal Intercostal

A

Depress Ribs

Support Intercostal Spaces

Stabilize Chest Wall

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19
Q

Origin of Innermost Intercostal

A

Lower margin of rib to upper margin of lower next rib

Courses obliquely forward and UPWARD from costal angle to sternum

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20
Q

Insertion of Innermost Intercostal

A

Lower margin of rib to upper margin of lower next rib

Courses obliquely forward and UPWARD from costal angle to sternum

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21
Q

Action of Intermost Intercostal

A

Depress Ribs

Support Intercostal Spaces

Stabilize Chest Wall

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22
Q

Origin of Subcostal Muscle

A

Lower margin of lower ribs to the inner surface of two to three ribs below

23
Q

Insertion of Subcostal Muscle

A

Lower margin of lower ribs to the inner surface of two to three ribs below

24
Q

Action of Subcostal Muscle

A

Depress ribs

25
Origin of Transverse Thoracis
Sternum and Xiphoid Process (inner surface)
26
Insertion of Transverse Thoracis
2nd-6th ribs (costal cartilage and inner surface)
27
Action of Transverse Thoracis
Weakly depresses ribs
28
Origin of Subclavius
1st rib
29
Insertion of Subclavius
Clavicle (inferior surface)
30
Action of Subclavius
Steadies the clavicle in the sternoclavicular joint
31
Origin of Pectoralis Minor
3rd-5th ribs
32
Insertion of Pectoralis Minor
Coracoid Process
33
Action of Pectoralis Minor
Draws scapula downward causing inferior angle to move postero-medially (scapular adduction) Rotate glenoid inferiorly Assists in respiration
34
Origin of Serratus Anterior (Superior)
1st-9th ribs
35
Insertion of Serratus Anterior (Superior)
Scapula (costal and dorsal surfaces of superior angle)
36
Action of Serratus Anterior (Superior)
Lower raised arm
37
Origin of Serratus Anterior (Intermediate)
1st-9th ribs
38
Insertion of Serratus Anterior (Intermediate)
Scapula (costal surface of medial border)
39
Action of Serratus Anterior (Intermediate)
Entire muscle draws scapula laterally forward (protraction) Elevate ribs when shoulder is flexed
40
Origin of Serratus Anterior (Inferior)
1st-9ribs
41
Insertion of Serratus Anterior (Inferior)
Scapula (costal surface of medial border and costal/dorsal surfaces of inferior angle)
42
Action of Serratus Anterior (Inferior)
Protraction & (allows elevation of arm above 90 degrees)
43
Origin of Pectoralis Major (Clavicular)
Clavicle
44
Insertion of Pectoralis Major (Clavicular)
Humerus (Crest of Greater Tubercle)
45
Action of Pectoralis Major (Clavicular)
Entire Muscle: Adduction, Internal rotation Clavicular and Sternocostal Part: flexion, assists in respiration when shoulder is flexed
46
Origin of Pectoralis Major (Sternocostal)
Sternum and Costal Cartilages 1-6
47
Insertion of Pectoralis Major (Sternocostal)
Humerus (Crest of Greater Tubercle)
48
Action of Pectoralis Major (Sternocostal)
Entire Muscle: Adduction, Internal rotation Clavicular and Sternocostal Part: flexion, assists in respiration when shoulder is flexed
49
Origin of Pectoralis Major (Abdominal)
Rectus Sheath (anterior layer)
50
Insertion of Pectoralis Major (Abdominal)
Humerus (Crest of Greater Tubercle)
51
Action of Pectoralis Major (Abdominal)
Adduction and Internal rotation
52
Origin of Coracobrachialis
Scapula (coracoid process)
53
Insertion of Coracobrachialis
Humerus (in line with crest of lesser tubercle)
54
Action of Coracobrachialis
Flexion, abduction, internal rotation

THORAX OCU2024 (2 decks)

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