Thoracic Wall Flashcards
Where does the superior epigastric vein drain into?
Internal Thoracic Vein
What area does the superior epigastric vein drain?
Anterior Abdominal Wall
Superior Rectus Abdominis Muscles
What is the function of the Transversus Thoracis muscle?
Depress the ribs during forced expiration, to decrease the volume of the thoracic cavity.
Where does the anterior intercostal arteries originate from?
Internal Thoracic Artery (R&L)
What nerve innervates the Transversus Thoracis muscle?
Intercostal Nerves
Where does the Internal Thoracic Vein drain into?
Brachiocephalic Vein
What are the branches of the Internal Thoracic Vein?
Superior Epigastric Vein
Musculophrenic Vein
Which artery does Anterior Intercostal Artery anastamose with?
Posterior Intercostal Artery
Where does the Internal Thoracic Artery originate from?
Subclavian Artery
What nerve innervates the Serratus Anterior muscle?
Long Thoracic Nerve (arises from roots C5-C7)
What is the function of Serratus Anterior muscle?
Protraction and stabilization of the scapula.
Assisting upward rotation of the scapula.
What area does the Internal Thoracic Artery supply?
Anterior Thoracic Wall
Breast Tissue
What blood vessels supply Serratus Anterior Muscle?
Lateral Thoracic Artery (branch of the Axillary Artery)
Where does the Pulmonary Trunk originate from?
Right Ventricle
What is the origin of the Phrenic Nerve?
Ventral nerve roots C3-C5
What is the sensory innervation of the Phrenic Nerve?
Fibrous Pericardium
Mediastinal Pleura
Diaphragmatic Peritoneum
What area does the Pericardiacophrenic Vein drain?
Pericardium and Thoracic Diaphragm
What is the motor innervation of the Phrenic Nerve?
Diaphragm
What functional deficit would be observed if the Phrenic Nerve was lesioned?
Weakening or paralysis of the diaphragm muscle
Reduced ability to breathe
Where does the Pericardiacophrenic Vein come from?
Pericardium and Thoracic Diaphragm
Where does the Pericardiacophrenic Vein drain into?
Internal Thoracic Vein
Where does the Musculophrenic Artery originate from?
Internal Thoracic Artery
What area does the Superior Epigastric Artery supply?
Anterior Abdominal Wall
Upper Rectus Abdominis Muscles
What area does the Musculophrenic Artery supply?
Intercostal Spaces/Muscles 7-9
Pericardium
Anterior Diaphragm
Upper Rectus Abdominis Muscle
Where does the Superior Epigastric Artery originate from?
Internal Thoracic Artery
What is the function of the Innermost Intercostal Muscle?
Depress ribs during forced expiration.
Decrease the volume of the thoracic cavity.
Where does the Pericardiacophrenic Artery originate from?
Internal Thoracic Artery
What area/structure does the pericardiacophrenic artery supply?
Pericardium
Thoracic Diaphragm
Where does the Superior Vena Cava drain into?
Right Atrium
What is the function of the External Intercostal Muscle?
Elevate the ribs during forced inspiration.
Increase the volume of the Thoracic Cavity
Where does the Superior Vena Cava come from?
Right and Left Brachiocephalic Veins
Where does the Internal Thoracic Vein come from?
Anterior Intercostal Veins
Superior Epigastric Vein
Musculophrenic Vein
Which blood Vessel supplies the External Intercostal Muscle?
Intercostal Artery
