Week IIII Muscles Flashcards

1
Q

Diaphragm

A

O: internal surface of ribs 7-12 and their costal cartilage, internal surface of the xiphoid process of the sternum, and anterior vertebral bodies of L1-L3

I: central tendon (dome) of the diaphragm

A: expands the thoracic cavity when abdominal breathing

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2
Q

External Intercostals

A

O: inferior boarder of one rib

I: superior boarder of the rib directly inferior

A: elevates the ribs at the sternocostal and costospinal joints (to assist with inhalation)

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3
Q

Internal Intercostals

A

O: superior boarder of one rib (and its costal cartilage)

I: inferior boarder of the rib (and its costal cartilage) directly superior

A: depresses ribs at the sternocostal and costospinal joints (to assist with exhalation)

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4
Q

Serratus Posterior Superior

A

O: inferior ligamentum nuchae and spinous processes (SPs) of C7-T3

I: superior external surfaces of ribs 2-5

A: elevate ribs 2-5 (during inhalation) at the sternocostal and costospinal joints

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5
Q

Serratus Posterior Inferior

A

O: spinous processes of T11-L3

I: inferior external surfaces of ribs 9-12

A: depress ribs 9-12 (in exhalation) at the sternocostal and costospinal joints

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