Term
True Ribs
TG: p. 171 and 173 |
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Definition
1st 7 Ribs.
Named such as they attach directly to the sternum via costal cartelage. |
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Term
False Ribs
TG: p. 171 and 173 |
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Definition
8-12
Named such as their attachment to the sternum merges "piggybacks" on the costal cartelage of true ribs. |
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Term
Floating Ribs
TG: p. 171 and 173 |
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Definition
11 and 12
Named such as NO attachemnt to the sternum |
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Term
TG: p.89
Pectoralis Major
Origin - Intersion |
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Definition
Origin: Medial half of clavicle, sternum and cartilage of ribs 1-6.
Insertion: Lateral lip of the bicipital groove. |
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Term
TG: p.89
Pectoralis Major
Action |
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Definition
Action:
ALL FIBERS: Adduct the shoulder, Medial (internally) rotate the shoulder at the gleno-humeral joint.
Assist in elevation of thorax during forced inhalation.
UPPER FIBERS: Flexion of the shoulder at the gleno-humeral joint.
Horzontal adduction at the gleno-humeral joint. |
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Term
TG: p.89
Pectoralis Major
Action |
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Definition
Action:
LOWER FIBERS:
Extend the shoulder at the gleno-humeral joint. |
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Term
TG: p. 173
Bony Landmarks of the Sternum |
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Definition
Manubrium
Body of Sternum
Xiphoid Process |
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Term
TG: p. 50
Bony Landmarks of the Humerus |
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Definition
Greater Tubercle - Anterior and Lateral
Lesser Tubercle - Anterior and Medial
The Greater Tubercle is Superior to the Lesser Tubercle.
Bicipital Groove (Intertubercular Groove) Between the two Tubercles. It is also where the long head of the Biceps passes. |
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Term
| Q: What are the three segments of the Pectoralis Major? |
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Definition
| A: Clavicular, Sternal and Costal. |
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Term
| Q: What is the action of ALL the Pectoralis Major fibers? |
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Definition
A: Adduct the Shoulder (GH joint)
Medially (Interally) Rotate the Shoulder (GH joint)
Assist in elevation of the thorox during forced inhalation (reversal of muscle action) |
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Term
| Q: What is the action of the UPPER fibers of the Pectoralis Major? |
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Definition
A: Flex the shoulder (GH joint)
Horizontal Adduction of the shoulder (GH joint) |
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Term
| Q: What is the the action of the LOWER fibers of the Pectoralis Major? |
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Definition
| A: Extend the shoulder (GH joint.) |
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Term
| What inserts on the lateral lip of the bicipital groove of the humerus? |
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Definition
| All the fibers of the Pectoralis Major |
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Term
| What Originates on the mediall half the clavicle? |
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Definition
| The Upper Fibers, the Clavicular Head of the Pectoralis Major. |
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Term
| What Originates on the Manibrium and Body of the Sternum? |
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Definition
| The Sternal Head of the Pectoralis Major. |
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Term
| What originates on the medial 1/2 of the clavicle? |
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Definition
| The Calvicuar Head of the Pectoralis Major. |
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Term
| What is the action of the claviculat head of the Pectoralis Major? |
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Definition
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Term
| What is the action of the Sternal head of Pectoralis Major? |
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Definition
| Extension of the SHoulder. |
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Term
| What is the origin of the Sterno-Costal segment of the Pectoralis Major? |
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Definition
| Manibrium, Body of Sternum AND Costal Cartilage of ribs 1 through 6. |
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