| Term 
 
        | External and Internal Intercostals: Origin |  | Definition 
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        | Term 
 
        | External and Internal Intercostals: Insertion |  | Definition 
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        | Term 
 
        | External and Internal Intercostals: Nerve |  | Definition 
 
        | Muscular collateral branches of intercostal nerves |  | 
        |  | 
        
        | Term 
 
        | External and Internal Intercostals: Action |  | Definition 
 
        | Fix intercostal spaces during espiration. Aids forced inspiration by elevating ribs |  | 
        |  | 
        
        | Term 
 
        | Transverse Thoracic: Origin |  | Definition 
 
        | xiphoid process and inferior of sternum |  | 
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        | Term 
 
        | Transverse Thoracic: Insertion |  | Definition 
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        |  | 
        
        | Term 
 
        | Transverse Thoracic: Nerve |  | Definition 
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        |  | 
        
        | Term 
 
        | Transverse Thoracic: Action |  | Definition 
 
        | expiration (narrow chest) |  | 
        |  | 
        
        | Term 
 
        | Innermost Intercostals: Origin |  | Definition 
 
        | Internal aspect of ribs above and below |  | 
        |  | 
        
        | Term 
 
        | Innermost Intercostals: Insertion |  | Definition 
 
        | Internal aspect of ribs above and below |  | 
        |  | 
        
        | Term 
 
        | Innermost Intercostals: Nerve |  | Definition 
 
        | Muscular collateral branches of intercostal nerves |  | 
        |  | 
        
        | Term 
 
        | Innermost Intercostals: Action |  | Definition 
 
        | Fix intercostal spaces during respiration |  | 
        |  |