Pectoral Region, Lungs and Thoracic Cage Flashcards
What is the origin and insertion of a muscle?
Origin: Fixed attachment of the muscle
Insertion: Where muscle ends and moves with contraction
4 vertical lines of chest wall?
My aunt Mary piper
1) Mid clavicular
2) Anterior axillary
3) Mid axillary
4) Posterior axillary
Origin and Insertion of Pectoralis Major?
1) Medial 3rd clavicle, sternum, and CCart
2) Humerus
Innervation of Pectoralis Major?
Medial and Lateral Pectoral Nerves
Action of Pectoralis Major?
Adduction, medial rotation of Humerus
Origin and Insertion of Pectoralis Minor?
1) Ribs 3-5
2) Coracoid process of scapula
Innervation of Pectoralis Minor?
Medial Pectoral Nerve
Action of Pectoralis Minor?
Protraction of shoulder
Origin and Insertion of Serratus Anterior?
1) Upper 8 ribs
2) Costal surface of scapula
Innervation of Serratus Anterior?
Action?
Long thoracic nerve
Protraction of scapula
Innervation of intercostal muscles?
Intercostal nerves (t1-11)
Lung function?
Oxygenate blood by bringing inspired air in contact in Pul Cap w/ O2 deficient blood
What does internal thoracic artery branch into?
1) Musculophrenic (diaphragm)
2) Superior epigastric (Front of abdomen)
Pleural cavity?
Space between visceral and parietal pleura
Name 2 functions of the serous fluid within the pleural cavity?
- Lubricates the pleurae.
2. Creates a surface tension helping the lungs to expand on inspiration.
Function of Hilum and 4 structures in Hilum?
Connect lungs to rest of the body
1) Pulmonary Artery, Bronchus, (2) Pulmonary Vein
3 smaller vessels in Hilum?
1) Bronchial Artery
2) Lymph nodes
3) Pulmonary plexus of autonomic nerves
Lobes of Right Lung?
Superior, Middle, Inferior
Lung containing foreign bodies?
Right lung, as right main bronchus shorter and more vertical
Where are the fissures found along Lungs?
1) Horizontal (4th rib)
2) Oblique (6th rib)
3 surfaces of the Lungs?
1) Costal
2) Mediastinal
3) Diaphragmatic
3 borders of lungs?
1) Anterior
2) Posterior
3) Inferior
Describe the innervation of the lungs?(3)
- Parasympathetic innervation derived from vagus nerve.
- Sympathetic innervation derived from sympathetic trunks.
- Visceral afferent - conducts pain impulses to sensory ganglion.
Action of Parasympathetic innervation?
Bronchoconstriction and vasodilation of pulmonary vessels
Action of Sympathetic innervation?
Bronchodilation and vasoconstriction of vessels (that are poorly ventilated)
What are the 2 impressions on the left lung?
Aortic and Cardiac
