muscles of the thoracic wall Flashcards

1
Q

Name the 3 “layers” of intercostal muscles

A

External, internal + innermost

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2
Q

The external intercostal muscles have an … orientation

A

Inferomedial (form kind of a V)

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3
Q

In the region of the costal cartilages, the external intercostal muscles form …

A

The external intercostal membrane

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4
Q

The internal intercostal muscles have an … orientation

A

Inferolateral (form kind of like an inverse V)

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5
Q

Name the aponeurotic band of the internal intercostal muscles in the region of the costal cartilages

A

Internal intercostal membrane

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6
Q

Name the muscles that originate from the posterior portion of the sternum

A

Transversalis thoracis

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7
Q

The … muscles are found in the posterior part of the thoracic wall + are very deep

A

Subcostal

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8
Q

The intercostal nerves + vessels run in the … space, between the … intercostal muscles

A

Intercostal, internal + innermost

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9
Q

The posterior intercostal arteries originate from…

A

The aorta + its branches

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10
Q

The anterior intercostal arteries originate from…

A

The internal thoracic artery

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11
Q

The intercostal veins run … to the intercostal arteries

A

Parallel

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12
Q

The main branches of the intercostal vessels are located in the … border of the superior rib

A

Inferior

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13
Q

Intercostal vessels + nerves have branches to innervate …

A

The superficial fascia + skin

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14
Q

The parasternal nodes of the thoracic wall drain into …

A

The bronchiomediastinal trunk

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15
Q

The intercostal lymph nodes drain either into… or …

A

The bronchiomediastinal trunk or the thoracic duct

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16
Q

Name the type of lymph nodes in the thoracic area that are located below the sternum

A

Diaphragmatic nodes

17
Q

The intercostal muscles are innervated by the … rami of spinal nerves

A

Anterior

18
Q

The nerves innervating the intercostal muscles go from segment … to segment … of the spinal cord

A

T1 to T11

19
Q

Spinal nerve that innervates the intercostal muscles + contributes to the brachial plexus

A

T1

20
Q

The intercostobrachial nerve innervates … + arises from …

A

The axillary region, from T2

21
Q

Dermatome T1 corresponds to…

A

The medial portion of the forearm, not the torax!

22
Q

Dermatome T4 corresponds to…

A

The mammary level (nipples)

23
Q

Dermatome T6 corresponds to…

A

The xiphoid process

24
Q

Dermatome T10 corresponds to…

A

The umbilicus

25
Q

Explain the way the nerves + vessels are arranged within the intercostal space

A

VAN