Module 1: The Thoracic Region Flashcards
What does the diaphragm separate
-thoracic and abdominal cavities
Right dome of diaphragm
-can rise up to level of upper border of rib 5
Left dome of diaphragm
-can rise up to level of lower border of rib 5
Central tendon of diaphragm
-where peripheral muscular fibres of diaphragm attach to inferior margin of thoracic cage and lumbar vertebrae
Right crus of diaphragm
-muscular extention of diaphragm that originates from anterolateral surface of upper 3 lumbar vertebrae
Left crus of diaphragm
-muscular extension of diaphragm that originates from anterolateral surface of upper 2 lumbar vertebrae
Apertures of the diaphragm
-caval opening
-esophageal hiatus
-aortic hiatus
Caval opening location
-in central tendon
-at level T8
Caval opening function
-opening for inferior vena cava
Esophageal hiatus location
-in right crus
-at level T10
Esophageal hiatus function
-opening for esophagus
Aortic hiatus location
-between left and right crus
-at level T12
Aortic hiatus function
-opening for abdominal portion of aorta
Intercostal muscles
-external intercostals
-internal/innermost intercostals
External intercostals
-fibres run anteroinferiorly from the lower border of rib (put hand in pocket)
Internal/innermost intercostals
-fibres run posterosuperiorly from upper border of rib
Muscle strain
-stretching or tearing of muscle fibres, because of too much stretch or forced contraction
Movements that would cause an intercostal muscle strain
-twisting
-reaching upwards
Joints of the sternum
-manubriosternal joint
-xiphisternal joint
Manubriosternal joint
-where inferior border of manubrium articulates with superior part of sternal body (sternal angle)
What is manubriosternal joint in line with
-T4 and T5
Xiphisternal joint
-attaches the xiphoid process to sternal body
What is xiphisternal joint in line with
-T9
Parts of the intervertebral disc
-annulus fibrosus
-nucleus pulposus