Pectoral Region, Lungs and Thoracic Cage

Question 1

What is the origin and insertion of a muscle?

Answer 1

Origin: Fixed attachment of the muscle
Insertion: Where muscle ends and moves with contraction

Question 2

4 vertical lines of chest wall?

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Answer 2

1) Mid clavicular
2) Anterior axillary
3) Mid axillary
4) Posterior axillary

Question 3

Origin and Insertion of Pectoralis Major?

Answer 3

1) Medial 3rd clavicle, sternum, and CCart

2) Humerus

Question 4

Innervation of Pectoralis Major?

Answer 4

Medial and Lateral Pectoral Nerves

Question 5

Action of Pectoralis Major?

Answer 5

Adduction, medial rotation of Humerus

Question 6

Origin and Insertion of Pectoralis Minor?

Answer 6

1) Ribs 3-5

2) Coracoid process of scapula

Question 7

Innervation of Pectoralis Minor?

Answer 7

Medial Pectoral Nerve

Question 8

Action of Pectoralis Minor?

Answer 8

Protraction of shoulder

Question 9

Origin and Insertion of Serratus Anterior?

Answer 9

1) Upper 8 ribs

2) Costal surface of scapula

Question 10

Innervation of Serratus Anterior?

Action?

Answer 10

Long thoracic nerve

Protraction of scapula

Question 11

Innervation of intercostal muscles?

Answer 11

Intercostal nerves (t1-11)

Question 12

Lung function?

Answer 12

Oxygenate blood by bringing inspired air in contact in Pul Cap w/ O2 deficient blood

Question 13

What does internal thoracic artery branch into?

Answer 13

1) Musculophrenic (diaphragm)

2) Superior epigastric (Front of abdomen)

Question 14

Pleural cavity?

Answer 14

Space between visceral and parietal pleura

Question 15

Name 2 functions of the serous fluid within the pleural cavity?

Answer 15

1. Lubricates the pleurae.

2. Creates a surface tension helping the lungs to expand on inspiration.

Question 16

Function of Hilum and 4 structures in Hilum?

Answer 16

Connect lungs to rest of the body

1) Pulmonary Artery, Bronchus, (2) Pulmonary Vein

Question 17

3 smaller vessels in Hilum?

Answer 17

1) Bronchial Artery
2) Lymph nodes
3) Pulmonary plexus of autonomic nerves

Question 18

Lobes of Right Lung?

Answer 18

Superior, Middle, Inferior

Question 19

Lung containing foreign bodies?

Answer 19

Right lung, as right main bronchus shorter and more vertical

Question 20

Where are the fissures found along Lungs?

Answer 20

1) Horizontal (4th rib)

2) Oblique (6th rib)

Question 21

3 surfaces of the Lungs?

Answer 21

1) Costal
2) Mediastinal
3) Diaphragmatic

Question 22

3 borders of lungs?

Answer 22

1) Anterior
2) Posterior
3) Inferior

Question 23

Describe the innervation of the lungs?(3)

Answer 23

1. Parasympathetic innervation derived from vagus nerve.
2. Sympathetic innervation derived from sympathetic trunks.
3. Visceral afferent - conducts pain impulses to sensory ganglion.

Question 24

Action of Parasympathetic innervation?

Answer 24

Bronchoconstriction and vasodilation of pulmonary vessels

Question 25

Action of Sympathetic innervation?

Answer 25

Bronchodilation and vasoconstriction of vessels (that are poorly ventilated)

Question 26

What are the 2 impressions on the left lung?

Answer 26

Aortic and Cardiac