Anatomy Of The Thorax Flashcards
Sternocleidomastoid innervation
Spinal accessory nerve
Sternocleidomastoid attachments
Mastoid process to sternum + clavicle
How does sternocleidomastoid effect chest wall
Lifts on inspiration
Pectoralis major innervation
Pectoral nerves C5-T1
How does pectorals major move the chest wall
Lift
Where does serratus anterior attach
Scapular -> ant aspect of ribs
Serratus anterior innervation
Long thoracic nerve
Which spinal nerves contribute to the long thoracic nerve
C5-7
Which muscle if the boxers muscle
Serratus anterior
Which nerve is at risk in a radical mastectomy
Long thoracic nerve
What does long thoracic nerve damage cause
Winging of the scapula
Rectus abdominis attachments
Costal margin -> pubic crest + symphysis
Rectus abdominins innervation
Intercostal + subcostal nerves t7-t12
Which spinal nerves contribute to the intercostal and subcostal nerves
T7-12
How does rectus abdominis effect chest wall
Lowers
How do external intercostal muscles move chest wall
Raise
Innervation of external intercostal muscles
Intercostal nerves
T2-11
Which spinal nerves contribute to the intercostal nerves
T2-11
3 layers of intercostal muscles
External intercostals
Internal intercostals
Innermost intercostals
Do external intercostals run inferoanteriorly inferoposteriorly
Inferoanteriorly
Do internal and innermost intercostals run inferoanteriorly or inferoposteriorly
Inferoposteriorly
Which muscles layers do the neuro vascular bundles run between
Internal and innermost
What vessel do the posterior intercostal arteries branch from
Aorta
What vessel do the anterior intercostal arteries branch from
L/R Internal mammary
Is the lateral part of the chest wall supplied by the anterior or posterior intercostal circulation
Posterior
What separates the thoracic cavity and abdominal cavity
Diapragm
Diapragm innervation
Phrenic nerve
Which spinal nerves contribute to the phrenic nerve
C3,4,5
What levels do the IVC, oesophagus, and aorta transect the diapragm
IVC - T8
Oesophagus - T10
Aorta - T12
What are the 2 layers of the lung pleura called
Visceral pleura
Parietal pleura
What is between the visceral and parietal pleura
Pleural cavity
What fills the pleural cavity and what is its purpose
Fluid
Decr friction
Which layer of the pleura is sensitive to pain
Parietal
Which intercostal nerves innervate the parietal pleura
T2-12
Pneumothorax
Air in thoracic cavity
