Muscles of the Thoracic wall Flashcards by Ahmedh Rifky | Brainscape

Q

External Intercostal Muscle:

Origin?
Insertion?
innervation?

A

Lower border of a rib

Upper border of rib
Bordered by the extra thoracic fascia

Intercostal Nerves

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Internal Intercostal Muscles:

Origin?
Insertion?
innervation?

A

Upper Border of a rib

Lower border of a rib

Intercostal nerves

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Function of the Internal Intercostal Muscle:

A

Tense the Intercostal Spaces

Support Breathing Mechanism

contraction - lowering of the ribs

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

External Intercostal Muscle:

Function?

A

Contraction - Elevation of the rib

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Transverses Thorasis:

Origin?
Insertion?
innervation?

A

Xiphoid Process
Body of the Sternum

Cartilage of Ribs 2 - 6

Intercostal Nerves 2 - 6

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Transverses Thorasis:

Function?

A

Pulls the rib cartilage caudally

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Subcostal Muscles:

Origin?
Insertion?
innervation?

A

Inner Surface of one rib

Second or third rib below

Lower intercostal nerves

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Subcostal Muscles:

Function?

A

Accessory Muscles of expiration

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Serratus Anterior:

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly