Section 1

Question 1

3 Divisions of hypaxial muscles

Answer 1

1) Body wall mm
2) Limb mm
3) Prevertebral mm

Question 2

Body wall mm

Answer 2

Neck: scalene

Thorax: ext. intercostals

             int. intercostals

               scattered deep bits

Abdomen: Ext. obliques

              Int obliques

             Transverse abdominis

Question 3

Ext. intercostal muscles are deficient where?

Answer 3

Anteriorly

Question 4

Internal intercostals are deficient where?

Answer 4

posteriorly

Question 5

What makes up “deep scattered bits”

Answer 5

Posteriorly: Subcostal m fibers

Laterally: innermost intercostals

Anteriorly: Transverse thoracis m.

Question 6

Subcostal muscle fibers span how many spaces?

Answer 6

2

Question 7

Innermost intercostals span how many spaces?

Answer 7

1

Question 8

Transverse thoracis muscle span how many spaces?

Answer 8

Several

Question 9

How many posterior intercostal arteries are there?

Answer 9

11

Question 10

Posterior intercostal arteries 1+2 come from?

Answer 10

costocervical trunk

Question 11

Posterior intercostal arteries 3-11 come from?

Answer 11

Aorta

Question 12

Intercostal N span from ?

Answer 12

T1-T11

Question 13

Subcostal N located at?

Answer 13

T12

Question 14

Sympathetic trunk input

Answer 14

T1-L2

Through white rami comunicans

Question 15

Anterior intercostal artery stops where?

Answer 15

9th intercostal space

Question 16

Where internal thoracic artery split?

Answer 16

At 6th intercostal space

Question 17

Superior mediastinum extends from __ to __

Answer 17

T1-T4

Manubrium to Vertebrae

Rib one acts as superior border

Question 18

Superior mediastinum contains ?

Answer 18

Remnants of thymus gland

brachiocephalic veins

SVC

Aortic arch and branches

Lower trachea

phrenic nn

vagus nn

Left recurrent laryngeal n

Thoracic duct

Question 19

Anterior inferior mediastinum

Answer 19

• Smallest part of mediastinum
• Anterior limit is sternum
• Posterior limit is ant. surface of fibrous pericardial sac
• Contains:

Fat

Sternopericardial ligaments

internal thoracic aa and vv

lymph nodes

Question 20

Middle Inferior mediastinum

Answer 20

• Limits are walla of fibrous pericardial sac
• Phrenic nn lie b/w fibrous pericardial sac and mediastinal pleura
• Contains:

heart

roots of great vessels

Question 21

Posterior inferior mediastinum

Answer 21

• Posterior limit T4-T12
• Anterior limit is post. surfce of fibrous pericardial sac
• Contains:

Esophagus

vagus nn

thoracic duct

azygos venous system

thoracic aorta

sympathetic trunks

splanchnic nn

lymph nodes

Question 22

Types of parietal pleura

Answer 22

Mediastinal P

Diaphragmatic P

Costal P

Costomediastinal recess

costodiaphragmatic recess