Thorax Flashcards
True ribs/ vertebrosternal
1st to 7th rib
False Ribs/ vertebrochondral
8th to 12th rib
False ribs proper
8th to 10th
Floating Ribs
11th - 12th
Body of Thoracic Vertebra
Head of the Ribs
Transverse Process of Thoracic Vertebra
Tubercle of the Ribs (same number)
Superior Articular Facet of Rib
Higher level of body of vertebra
Inferior Articular Facet of Rib
Same level of the body of vertebra
Typical Ribs
3rd to 9th
Atypical Ribs
1st, 2nd, 10th, 11th, 12th
Broadest rib and Most Curved
Rib 1
Prominent Scalene Tubercle for attachent of scalenus anterior muscle
Rib 1
Thinner, less curved, longer rib
Rib 2
Tuberosity for serratus anterior
Rib 2
articulates with T10 vertebra only
Rib 10
Short, Have single facet on their heads
No neck or tubercle
Rib 11 and 12
Weakest point of the rib
anterior to the angle of the rib
Most commonly fractured ribs
Rib 7 to 10
Boundaries of Thoracic Inlet
Post - 1st thoracic vertebra
Lat - medial border of 1st rib
Ant - manubrium sternum
Vertical diameter on inspiration
increases as diaphragm moves down
vertical diameter on expiration
decreases as diaphragm moves up
Muscles that depress the ribs
Muscles for expiration
- serratus posterior inferior
- internal intercostal
- trasverse thoracis
Muscles that elevate the ribs
Muscles for inspiration
- serratus posterior superior
- levator costarum
- external intercostal
- innermost intercostal
- subcostal
Angle of louie
Lower border of T4
Upper border of T5
Contents of Superior Mediastinum ( 13)
- thymus gland
- superior vena cava
- brachiocephalic artery and vein
- left common carotid artery
- left subclavian artery
- arch of aorta
- phrenic and vagus nerves
- trachea
- esophagus
- thoracic duct
- left recurrent laryngeal nerve
- lymph nodes
- sympathetic trunks
Contents of Anterior Mediastinum (4)
- Thymus Gland
- Sternopericardial Ligament
- Internal thoracic artery and branches
- lymph nodes
Contents of Middle Mediastinum (6)
- heart and ascending aorta
- percardium
- roots of great blood vessels
4,, phrenic nerv - main bronchi
- lymph nodes
Contents of Posterior Mediastinum (8)
- descending thoracic aorta
- esophagus
- thoracic duct
- azygous vein
- hemi azygous vein
- vagus nerve
- sympathetic trunk
- lymph nodes
Improper development of the 3rd and 4th pharyngeal pouch
Di george syndrome
- no thymus
- no parthyroid gland
Location of pericardiu
Anterior to T5 - T8
Posterior to body of sternum and 2nd to 6th costal cartilage
Where is the needle inserted in a pericardiocentesis
left xiphocostal angle
Layers in doing pericardiocentesis
Skin Fascia Rectus Sheath Rectus Abdominis Fibrous Layery Parietal layer of Serous Pericardium Pericardial Fluid Serous layer of Serous Pericardium