Thoracic Wall

Question 1

Manubrium

Answer 1

Articulates with the clavicles, first 2 ribs, and the body of the sternum

Question 2

Jugular Notch (Detailed)

Answer 2

Top of the sternum is in a horizontal plane which passes through the intervertabal disc between the T2 and T3

Question 3

1st Rib Articulation

Answer 3

Manubrium below the sternoclavicular articulation, usually cannot be palpated

Question 4

2nd Rib Articulation

Answer 4

Junction of the manubrium and body, at the sternal angle

Question 5

Sternoclavicular Joint (General)

Answer 5

Synovial joint which contains a fibrocartilaginous disk which separates the cavity into 2

Question 6

Interclavicular Ligament

Answer 6

(Top left of picture)

Extends from one clavicle to the other

Strengthens superior surface of the joint capsule

Question 7

Body and Xiphoid Process Articulation

Answer 7

Body articulates with ribs 2-7, manubrium and xiphoid process

Xiphoid process articulates only with body of sternum (recessed and may have a hole in it)

Question 8

Anterior and Posterior Sternoclavicular Ligaments

Answer 8

(Red in picture)

Anterior and Posterior surface of the capsule, therefore capsule is strengthened

Question 9

Costoclavicular Ligament

Answer 9

(Top Right of picture)

Strong accessory ligament which joins the clavicle to the first rib

Question 10

Number of Ribs and Rib Types

Answer 10

12 Pairs, 7 are True, 5 are False

Question 11

Rib Structure

Answer 11

Head- Articulates with the body of the thoracic vertebrae

Neck- Joins rib body

Tubercle- Junction of neck and body, articulates with the end of the transverse process of the thoracic vertebrae

Shaft

Angle- On typical ribs, distal to their tubercles which corresponds to the most posterior aspect of the thoracic cavity

Costal Cartilage

Question 12

True Rib Articulations

Answer 12

Articulates with the sternum through their costal cartilages

Question 13

1st Rib Characteristics

Answer 13

Shortest, broadest and most curved

Has a scalene tubercle separating grooves for the subclavian artery and vein

Question 14

Rib Counting

Answer 14

Counted from the 2nd rib at the level of the sternal angle

Question 15

Typical Rib Characteristics

Answer 15

Ribs 3-7, have an angle

On the inner surface near the lower border of the ribs is a groove which containst he intercostal vein, artery, and nerve

Not horizontal, slope inferiorly from posterior to anterior

Question 16

1st and 2nd Rib Articulation

Answer 16

1st Rib- T1 only (CARTILAGINOUS JOINT), upper part of its body close to the pedicle

2nd Rib- T1 and T2, lower part of the body of T1, the disk between T1 and T2 and the uper part of T2, tubercle of rib articulates with transverse process of T2

both interact with sternum

Question 17

Ribs 8-10 Articulations

Answer 17

Articulate with the rib above through its costal cartilage

Question 18

Rib 11 and 12 Articulation

Answer 18

Do NOT articulate anteriorly (floating rib)

Question 19

Thoracic Vertebrae Characteristics

Answer 19

Posteriorly the ribs articulate with vertebrae, usually with the body and transverse proess