ANAT 315 - Thoracic Cage Muscles

list the superficial muscles of the thoracic cage

label

label. what is this muscle? list origin, insertion, action, innervation

label

label. list origin, insertion, action, innervation

label. list origin, insertion, action

label

lable. list anatomical relationships

serratus anterior:

interdigitation with fibres of the external oblique

inferior & deep to pec major

list origin, insertion, action, innervation

where does this muscle insert?

label

list origin, insertion, action, innervation of serratus posterior superior

list origin, insertion, action, innervation of serratus posterior inferior

A) coracoid process

B) pectoralis minor

list the deep muscles of the thoracic cage

label. list action and depth

label

label

what layer of intercostal is shown? list action

label

what is the action of the innermost intercostals?

label. list origin, insertion, action, innervation

label. describe structure and function

label. list origin, insertion, action, innervation

label

label

what nerves innervate the thoracic wall? where do they originate from, where do the run through? are they sensory or motor?

d) correct

origin: anterior surface of clavicle & sternum, upper costal cartilage

insertion: lateral lip of interterbercular groove

actions: adduction, flexion, internal rotation at GH joint

describe the pressure/volume relationship for inspiration vs expiration

list the primary and accessory muscles of inspiration

list the primary and secondary muscles of expiration

list the function of the accessory muscles of respiration. distinguish between passive and forced respiration

assist with forced inspiration & expiration

• passive (quiet) respiration → elastic recoil of lungs, occurs at rest

• forced respiration → inspiration & expiration occur due to forced muscular contraction. ie. exercise, singing

describe the pressure/volume relationship and actions of the primary muscles of respiration during inspiration

describe the pressure/volume relationship and actions of the primary muscles of respiration during expiration

label. list origin, insertion, action (including for respiration)

label. list actions (including for respiration)

A. transversus thoracis

B. intercostal nerves

A. internal throacic arteries

B. anterior intercostal arteries

C. descending thoracic aorta

D. posterior intercostal arteries

A. subclavian arteries

B. internal thoracic arteries

label. what structure do the vessels run through and what muscles do they run between?

A. posterior intercostal veins

B. azygos vein

C. accessory hemiazygos vein

D. hemiazygos vein

E. superior vena cava

A. intercostal nerves

B. azygous vein

A. subclavius

B. pectoralis minor

C. serratus anterior

D. pectoralis major

E. serratus anterior

A. posterior intercostal artery

B. anterior intercostal artery

C. internal thoracic artery

D. descending thoracic aorta

1. hemiazygous vein

2. accessory hemiazygous vein

3. azygous vein

4. posterior intercostal veins

5. superior vena cava

6. diaphragm

a) posterior surface of sternum