(1) Thoracic Wall And Cavities (Olinger) Flashcards
What are the components of the sternum?
(3 parts)
Manubrium
Body of the Sternum
Xiphoid process

Label the diagram


What are the three classifications of ribs?
(both names)
Vertebrocostal Ribs (True)
Vertebrochondral Ribs (False)
Vertebral (Floating) Ribs
What rib segments make up the following?
Vertebrocostal Ribs (True)
Vertebrochondral Ribs (False)
Vertebral (Floating) Ribs
Vertebrocostal Ribs (True) : 1-7
Vertebrochondral Ribs (False): 8-10
Vertebral (Floating) Ribs: 11,12
Which ribs are considered “typical”?
3rd-9th

What ribs are considered “Atypical” ribs?
1st, 2nd
10th-12th

Atypical Ribs:
Describe how the 1st rib is identified
Shortest
Broadest
Grooves for subclavian A. and V.
Scalene Tubercle

Atypical Ribs:
Descibe how the second rib is identified
Tuberosity of serratus anterior

What is this?

1st Rib
What is this?

Second Rib
What are these?

Ribs 10, 11, 12
What is the difference b/w a simple vs a complicated rib fracture?
Simple: Break of the rib itself
Complicated: break of blood vessels, pleura, multiple rib fractures

What is this?

Typical Thoracic Vertebra
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Describe how a rib articulates with the vertebral column:

Label the diagram


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During inspiration which direction does the thoracic cage move?
UPWARDS

During expiration, which way does the thoracic cage move?
Downward

Label the diagram

Synchondrosis
Identify the difference in location between a dislocation vs a separation

At the arrows, identify the type of joint!


Label the arrows


Label the diagram:


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What are the apertures of the thorax?
–> Superior Thoracic Aperture (Thoracic Inlet)
–> Inferior Thoracic Aperture (Thoracic Outlet)
Superior Thoracic Aperture
Communicates b/w?
Neck and Thorax
Superior Thoracic Aperture
Contents?
Trachea
Esophagus
Superior Thoracic Aperture
Boundaries?
T1 Vertebral Segment
Paired 1st Ribs
Superior Manubrium
Inferior Thoracic Aperture
Communicates b/w?
Thorax and Abdomen
Inferior Thoracic Aperture
Contents?
Esophagus
Inferior Vena Cava
Aorta
Inferior Thoracic Aperture
Boundaries?
T12 Vertebral Segment
11th and 12th Ribs
7th-10th Costal Cartilages
Xiphisternal Joint
HN: The Thoracic Cavity if surrounded by an ____________________ thoracic cage
Osteocartilaginous
HN: The Thoracic cavity contains 3 primary divisions:
What are they?
Two pulmonary cavities (located laterally, contain lungs)
Mediastinum (located centrally, contains heart, thoracic great vessels, trachea, thoracic esophagus, thymus)
What does the mediastinum contain?
Heart
Thoracic Great Vessels
Trachea
Thoracic Esophagus
Thymus
CN:
Which are the most commonly fractured ribs?
MIDDLE RIBS
CN:
What are supernumerary ribs?
Extra ribs
in either the cervical region or lumbar region
What are the three types of joints?
- Synovial Joint (Diarthrosis)
- Fibrous Joint (Synarthrosis)
- Cartilaginous Joint (Amphiarthrosis)
What are the two forms of movement that occur at the costovertebral joint?
Describe their movement
- Bucket Handle movement: Increases transverse diameter of the thorax
- Pump Handle movement: increases the anterior-posterior diameter of the thorax
CN:
What does a dislocation of ribs refer to?
Dislocation at the Sternocostal joint
CN:
What does a separation of ribs refer to?
Separation at the costochondral joint
CN:
Describe Thoracentisis
Insertion of needle through intercostal musculature b/w ribs to obtain a fluid sample or drain small amounts of blood or fluid from the pleural cavity
Needle is inserted inferior to the intercostal neurovascular bundle and superior to the collateral branches
CN:
Describe Insertion of chest tube
Insertion of a tube to remove large amounts of air, fluid, blood or pus from the pleural cavity
Tube is inserted b/w 5th and 6th intercostal space
CN:
Describe thoroscopy
Insertion of a thoroscope into the pleural cavity through small incisions for visualizing and biopsying the space inside the pleural cavity
Intercostal Muscles
External Intercostal M.
O
I
A
N
O: Inferior border of ribs
I: Superior border of ribs
A: Elevate ribs
N: Intercostal N.
Intercostal Muscles
Internal Intercostal M.
O
I
A
N
O: Inferior border of ribs
I: Superior boder of ribs
A: Depress ribs
N: Intercostal N.
Intercostal Muscles
Innermost Intercostal M.
O
I
A
N
O: Inferior border of ribs
I: Superior border of ribs
A: Undetermined (probably same as internal intercostal m.)
N: Intercostal N.
What are the two internal thoracic wall muscles?
- Transverse thoracic m.
- Subcostal m.
Internal Thoracic Wall Ms.
Transverse Thoracic M.
O
I
A
N
O: Posterior surface of the lower part of the sternal body and xiphoid process
I: internal surface of the 2nd-6th Costal cartilages
A: Depress ribs
N: Intercostal N.
Internal Thoracic Wall Ms.
Subcostal M.
O
I
A
N
O: Inferior border of rib
I: Superior border of rib
A: probably similar to internal intercostal m.
N: intercostal n.