Term
The medial half of the clavicle;
The costal cartilages of the first 6-7 ribs;
The aponeurosis of the external oblique muscle |
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Definition
| Where does the pectoralis major muscle originate? |
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Term
| The lateral lip of the intertubercular groove (crest of the greater tubercle) of the humerus |
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Definition
| Where does the pectoralis major muscle insert? |
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Term
It adducts and medially rotates the humerus;
It produces a slight flexion of the arm;
Horizontal adduction |
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Definition
| What action does contraction of the pectoralis major muscle produce? |
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Term
| The lateral and medial pectoral nerves (C5, C6, C7, C8, and T1) |
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Definition
| What innervates the pectoralis major muscle? |
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Term
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Definition
| Where does the pectoralis minor muscle originate? |
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Term
| The coracoid process of the scapula |
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Definition
| Where does the pectoralis minor muscle insert? |
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Term
| It tilts the scapula anteriorly |
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Definition
| What action does contraction of the pectoralis minor muscle produce? |
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Term
| The medial pectoral and some lateral pectoral nerves (C6, C7, C8, and T1) |
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Definition
| What innervates the pectoralis minor muscle? |
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Term
| The external surface of the lateral portion of ribs 1-8 |
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Definition
| Where does the serratus anterior muscle originate? |
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Term
| The anterior surface of the medial border of the scapula |
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Definition
| Where does the serratus anterior muscle insert? |
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Term
It keeps the scapula against the chest wall;
It upwardly rotates and protracts the scapula;
It is the chief muscle for reaching and pushing movements |
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Definition
| What action does contraction of the serratus anterior muscle produce? |
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Term
| The long thoracic nerve (C5, C6, and C7) |
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Definition
| What innervates the serratus anterior muscle? |
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Term
| The junction of the first rib and its costal cartilage |
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Definition
| Where does the subclavius muscle originate? |
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Term
| The middle third of the clavicle inferiorly |
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Definition
| Where does the subclavius muscle insert? |
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Term
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Definition
| What action does contraction of the subclavius muscle produce? |
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Term
| The nerve to the subclavius (C5 and C6) |
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Definition
| What innervates the subclavius muscle? |
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Term
| The lower border of the rib above |
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Definition
| Where do the external intercostal muscles originate? |
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Term
| The upper border of the rib below |
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Definition
| Where do the external intercostal muscles insert? |
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Term
They aid in inspiration;
Keeps the space constant |
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Definition
| What action does contraction of the external intercostal muscles produce? |
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Term
The upper border of the rib below;
Costal cartilage |
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Definition
| Where do the internal intercostal muscles originate? |
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Term
The lower border of the rib above;
The sternum |
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Definition
| Where do the internal intercostal muscles insert? |
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Term
Aids in expiration;
Pulls down the ribs |
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Definition
| What action does contraction of the internal intercostal muscles produce? |
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Term
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Definition
| What innervates the external and internal intercostal muscles? |
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