Lecture 14- Thoracic Osteology and Wall Structure

Question 1

Twelve thoracic vertebrae
Twelve pair of ribs and their costal cartilage
Sternum
Intercostal Muscles

Answer 1

Components that make up the thoracic cage

Question 2

First thoracic vertebrae
First pair of ribs and costal cartilage
Manubrium

Answer 2

Boundaries of the superior thoracic outlet

Question 3

Twelfth thoracic vertebrae
Twelfth pair ribs and costal cartilages
Xiphisternal Joint
Larger of the two openings

Answer 3

Boundaries of inferior thoracic outlet

Question 4

The angle of the sternum where the second rib meets the sternum

Answer 4

Angle of Louis

Question 5

Superior aspect of the body of the sternum
Clavicle
First Rib

Answer 5

Articulations associated with the manubrium

Question 6

Symphysis type of join

Answer 6

Manubriosternal Joint

Question 7

What marks the level of dermatome 6

Answer 7

Xiphoid Process

Question 8

Ribs 1-7

Answer 8

Vertebrosternal Ribs

Question 9

Ribs 8-10

Answer 9

Vertebrochondral Ribs

Question 10

Ribs 11-12

Answer 10

Vertebral Ribs (Floating)

Question 11

What attaches to the head of the intervertebral disc

Answer 11

Head of the rib

Question 12

What is the narrow portion between the head and the tubercle

Answer 12

Neck of the rib

Question 13

What articulates with the transverse process of vertebra with same number

Answer 13

Tubercle of the rib

Question 14

What is the sternal extremity that takes a downward slope

Answer 14

Shaft of the rib

Question 15

What takes an upward slope

Answer 15

Costal Cartilage

Question 16

Why is the first rib important?

Answer 16

Due to its relation to the nerves of the brachial plexus and subclavian vessels

Question 17

Where is the jugular notch?

Answer 17

Root of the neck

Question 18

Where is the sternal angle?

Answer 18

Marks the second rib

Question 19

What sound is heard at the 5th intercostal space around the midclavicular line?

Answer 19

Apex Heartbeat

Question 20

What sound is heard at the 2nd intercostal space on the right side of the sternum?

Answer 20

Aortic valve heart sound

Question 21

What sound is heard at the 2nd intercostal space along the left side of the sternum?

Answer 21

Pulmonary Valve Heart Sound

Question 22

What sound is projected to the 5th intercostal space on the right side of the sternum?

Answer 22

Tricuspid valve heart sound

Question 23

What sound is projected to the 5th intercostal space about 10 cm left of the sternal midline?

Answer 23

Bicuspid valve heart sound

Question 24

What is between the sternal angle and the T 4/5 vertebral level?

Answer 24

Bifurication of the trachea

Question 25

The superior part is marked by the 7th cartilage and the inferior part is marked by the 10th cartilage

Answer 25

Costal margin

Question 26

What angle is important for CPR and located near the first set of abs?

Answer 26

Infrasternal angle

Question 27

What line runs directly through the sternum?

Answer 27

Midsternal line

Question 28

What line runs directly through the middle of the clavicle?

Answer 28

Midclavicular line

Question 29

What vertical line runs directly through the interior angle of the scapula?

Answer 29

Scapular line

Question 30

What line projects downward from the anterior axillary fold? What line is formed by lower border of pectoralis major?

Answer 30

Anterior axillary line

Question 31

What line projects downward from posterior axillary fold and is formed by tendon of Lat Dorsi Muscle?

Answer 31

Posterior axillary line

Question 32

What line runs right through the axilla?

Answer 32

Mid-Axillary Line

Question 33

The clavicular and scapular regions of upper thorax are innervated by?

Answer 33

C3-4

Question 34

The upper thorax is innervated by?

Answer 34

T1-5

Question 35

The Xiphoid process region is innervated by?

Answer 35

T6

Question 36

The Lower parts of the thorax and lateral/anterior abdominal wall are innervated by?

Answer 36

T7-12

Question 37

Where does the medial pectoral nerve arise from?

Answer 37

The medial cord of the brachial plexus

Question 38

Where does the lateral pectoral nerve arise from?

Answer 38

The lateral cord of the brachial plexus

Question 39

What intercostals extend from the vertebrae posteriorly to junction of ribs and intercostal cartilages?

Answer 39

External intercostals

Question 40

What intercostals begin at lateral edge of sternum and extend toward the vertebral column?

Answer 40

Internal Intercostals

Question 41

What are four or five slips that originate from the inferior sternum and extend superolaterally to internal surface of upper ribs

Answer 41

Transversus Thoracis

Question 42

This artery branches from the subclavian artery (for ribs 1-2) and the descending aorta (for ribs 3-12)

Answer 42

Posterior intercostal arteries

Question 43

This artery branches to become the internal thoracic (mammary) arteries

Answer 43

Anterior intercostal arteries

Question 44

This nerve has twelve pairs and each is derived from the ventral ramus of a spinal nerve

Answer 44

Intercostal nerve

Question 45

What comes from the internal thoracic artery and goes to the medial part of the mammary gland?

Answer 45

Anterior perforating arteries

Question 46

What comes from the 2nd-4th anterior perforating arteries and goes to the deep medial part of the mammary gland?

Answer 46

Medial Mammary Rami

Question 47

What goes from the lateral thoracic artery and goes to the inferior part of the mammary gland?

Answer 47

Lateral mammary artery

Question 48

What goes from the lateral cutaneous branches of intercostal arteries and goes to the lateral part of the mammary gland?

Answer 48

Lateral mammary rami