Anatomy Review Slides Lec. 22 Flashcards
Esophageal Hiatus
- Vertebral level
- Opening for
- accompanied nerve
- at T-10
- Opening of the Esophagus
- Accompanied by the VAGUS Nerve
Subdivisions of the Sup. Mediastinum
- Retrosternal
(Behind Sternum) - Prevertebral
(Before Vertebrae)
Aortic Hiatus
- Vertebral level
- Opening for
- accompanied nerve
- at T-12
- Opening of the Aorta
- Accompanied by the Greater Splanchnic Nerve
Arterial Supply to the Diaphragm
Sup. Aspect & Inf. Aspect
- Anything with “PHRENIC” in the name
Contents of the ANTERIOR Inferior Mediastinum
- Thymus
- Fat
- Lymph nodes
If you stick a needle too far in the RIGHT Costo-Diaphragmatic Recess, what could you Hit?
The LIVER
Left Crura is at what Position?
L2
How many Arcuates are there in the Diaphragm?
3 Total
- Median
- Medial
- Lateral
Where does the Sup. And Inf. Mediastinum separate?
- Horizontal plane
- B/w STERNAL Angle and IV Disc T4-T5
Mediastinum
Space b/w Lungs
Contents of the Retrosternal Sup. Mediastinum
- Greater vessels and branches
- Thymus
Also apart of the ANT. INF. Mediastinum
Contents of the Prevertebral Sup. Mediastinum
- Trachea
- Esophagus
- Thoracic Duct
- Sympathetic trunks
- Vagus Nerves
Lateral Arcuate
- Lumbocostal arches
- From deep Fascia of QUADRATUS LUMBORUM Muscle
- From Transverse process of L1 - L2
Nerve supply to the Diaphragm
PHRENIC Nerve
If you stick a needle too far in the LEFT Costo-Diaphragmatic Recess, what could you Hit?
The SPLEEN
What are the three structures that Pierce the diaphragm?
- Caval Foramen
- Esophageal Hiatus
- Aortic Hiatus
Medial Arcuate
- Lumbocostal Arches
- From deep fascia of PSOAS Major Muscle
- From transverse process of L1
Contents of the POSTERIOR Inferior Mediastinum
- Esophagus
- Thoracic duct
- AORTA and branches
- Vagus nerve
- Symp Trunks
- Azygoes system of veins
Caval Foramen
- Vertebral level
- Opening for
- accompanied nerve
- at T-8
- Opening of the INF. Vena Cava
- Accompanied by the Right Phrenic Nerve
Right Crura is at what Position?
L3
Major sections of the Mediastinum
2 Total
- Superior
- Inferior
Crura of the Diaphragm
- Muscular pillars
- Originate from LUMBAR vertebra
- Right “leg” is from L3
(Forms weak sphincter around the esophagus) - Left “leg” is from L2
Contents of the MIDDLE Inferior Mediastinum
- Pericardium
- Phrenic Nerves
- Pericardiac-phrenic Artery
- Heart and Great Vessels
