Osteology, Arthrology, and Myology of the Thorax Flashcards
What type of joint is the xiphisternal joint?
What is conncected?
synchondrosis
What does the costochondral joint connect?
What type of joint is it?
ribs and costal cartilages
synchondrosis
What is the function of the external intercostal muscles?
elevates ribs
What is a thoroscopy?
insertion of a thoroscope into the pleural cavity through a small incision for visualizing and biopsying
What are the contents of the superior thoracic aperture?
trachea
esophagus
nerves and vessels that supply and drain Head, neck, and UE
What type of joints are the costovertebral joints?
What are the ligaments to know?
synovial planar
radiate L
intraarticular L
articular capsule
Which ribs are typical?
3-9
What type of joints are sternocostal joints 2-7?
What are the ligaments to know?
synovial planar
anterior radiate sternocostal L
posterior radiate sternocostal L
What is the action of the subcostal muscles?
probably act as the internal intercostal M = depress ribs
What/where are ribs most commonly fractured?
middle ribs at weakest pt just anterior to costal angle
What costal notches are on the body of the sternum?
half of the 2nd, 3rd-6th, half of the 7th
How many costal notches are there total?
7
Which ribs are floating?
11 and 12
what does the superior costotransverse L connect?
neck of rib to transverse process on vertebral segment superiorly
What type of joint is the manubriosternal joint?
What is connected?
symphysis
sternal angle to 2nd costal notch
What are the boundaries of the inferior thoracic aperture?
T12 vertebral segment
11th and 12th ribs
7th-10th costal cartilages
xiphisternal joint
Which ribs have a head and tubercle?
3rd through 9th (typical ribs)
What does a radiate L connect?
head of a rib to the vertebral body
What is the landmark to know on the second rib?
tuberosity of serratus anterior M.
What is interesting about the way ribs 8-10 articulate with the sternum?
their costal cartilage articulates w/ costal cartilage one segment superior, which then articulates w/ sternum
Besides the head, what are the other 3 landmarks to know on the first rib?
scalene tubercle
groove for subclavian A (posterior)
groove for subclavian V (anterior, remember you have to rip it out to see the artery)
What type of joint is the first sternocostal joint?
What is it btw
synchondrosis
btw 1st costal cartilage and sternum
How many facets are on the head of a typical rib?
2 = inferior and superior articular facets
Which ribs are true/vertebrocostal?
1st-7th
Which ribs are atypical?
1, 2, 10-12
What n innervates the internal thoracic wall muscles?
Intercostal N
What are supernumerary ribs?
extra ribs in either cervical or lumbar region
cervical ribs can produce neural and circulatory problems
What does the lateral costotransverse L connect?
tubercle of the rib to transverse process
What type of joints are the interchondral joints?
6-9 costal cartilages = planar synovial
btw 9/10 = fibrous joint
Which ribs are false?
What does this mean?
8-10
attach from vertebra to costal cartilage immediately superior to that vetebral segment
What costal notches are on the manubrium?
1st and half of the 2nd
What does an intraarticular L connect?
head of rib to the intervertebral disc
What is the purpose of a thoracentisis?
Where do you insert it?
purpose is to obtain fluid sample or drain fluid from pleural cavity
insert needle btw ribs inferior to intercostal neurovasc bundle and superior to collateral branches
What is the action of the transverse thoracic Ms?
Where are they?
depress ribs
posterior surface of lower part of sternal body and xiphoid process to internal surface of 2-6 costal cartilages
What does a dislocation of a rib refer to?
A separation?
dislocation at sternocostal joint
separation = at costochondral joint
What is the function of the internal intercostal muscles?
depress ribs (innermost intercostal muscles probably have same function)
What costal notch is on the ziphoid process?
half of the 7th
What are the contents of the inferior thoracic aperture?
esophagus
trachea
inferior vena cava
aorta
What is the purpose of a chest tube?
Where do you insert it?
to remove large amounts of air, fluid, blood, or pus from pleural cavity
usually btw 5th or 6th intercostal space
Where is the articular capsule of a costovertebral joint strongest?
anteriorly (as the radiate L)
What type of joints are costotransverse joints?
What do they connect?
synovial planar
tubercle of rib to transverse process of vertebrae
What n innervates the intercostal muscles?
intercostal N
What is the difference btw a synchondrosis and a symphysis in general?
a synchondrosis has hyaline cartilage
symphysis has fibrocartilage (vertebra)
What are the boundaries of the superior thoracic aperture?
T1 vertebral segment, paired 1st ribs and superior manubrium
