Lab 4: Thoracic and Abdominal walls Flashcards
What seals ifnerior thoracic aperture
Diaphragm
What structures passs through thoracic inlet and outlet
Aorta
Esophagus
Sympathetic chain
What level is jugular notch
T2 posteriorly
What level is eternal angel
T4/5 posteriorly, rib 2
What level is xiphisternal junction
T9 posteriorly
Rib 7
Costal facet on tp articulates with
Tubercle of rib
Same # vertebrae
Costotransverse joint
Vertebral Demi facets articulates with
Head of rib
Supeior vert = inf facet and in vert = Superior facet (same number)
Costovertebral joint synovial plane/gliding, complex
True ribs
1-7
Attach to sternum directly
False ribs
8-10
Attach via costal margin
Floating ribs
11 and 12
No articulation with sternum
Why is rib 1 atypical
Single facet on head
Why is rib 10 atypical
Only one facet on head
Articulates with only some number vertebrae
Why is ribs 11-12 atypical
Single facet on head
No neck
No tubercle
No intercostal joints- floating
Short
Describe sternocostal articulations
Rib1 = synchrondrosis
Ribs 2-7 = synovial plane/gliding
Describe costochondral articulations
Synchondroses - ribs 1-10 only
Between eternal end fo rib and costal cartilage
Describe costovertebral articulations
Synovial plane/gliding
Between head of rib an vertebral Demi facet of thoracic vertebrae
Describe costotransverse articulations
Synovial plane/gliding
Between the tubercle of the rib and costal facet of the transverse process of the thoracic vertebrae with the same number
Where is van
Between internal and innermost intercostals
Describe external intercostal
Hands in pockets
Sup post to ant inf
Elevates ribs
Ribs to costal cartilages anteriorly
Elevates ribs forceful respiration
Describe internal intercostal
Opposite to external= perpendicular
Depress ribs, forceful expiration
Down and back
Describe innermost intercostal
Can only see on inside
Same orientation and fucntion of internal
Describe trans versus thoracis
Forceful expiration
From ribs o sternum = pull down
What are the 2 terminal branches of internal thoracic artery and hat general areas do they supply
Travels in costal margin
Musculophrenic to diaphragm
Superior epigastris to superior part rectus abdominals
Describe where anterior or posterior vans travel
Ant= from internal thoracic
Post = from thoracic aorta except for top 2 = from subclavian
Ant and post anastomose
What happens to lower intercostal nerves
Become thoracoabdominal nerves
Travel between internal oblique and transversus abdominals
Innervate abd msucles
T7-11 and t 12
Describe arteries
Thoracic aorta —> subclavian —> posterior intercostals + internal thoracic —> anterior intercostal arteries
name what other msucles help respiration
Scalenes
Serratus posterior superior anf inferior
Levatores costarum
Describe rectus abdominus tendinous intersections
3 usually
At umbilicus, xiphoid proces and one inebtwen
Describe rectus abdominus attachments
Inf= pubic tubercle + symphysis
Sup = xiphid process and ribs 5-7
Describe rectus abdominus functions
Compression fo abdomen and flexion
Describe external oblique attachments
Hands in pockets
Posterior/lateral = outer surface ribs 5-10
Anterior = pubic tubercle,iliac crest, Linea alba
Describe external oblique functions
Ipsilateral flexion
Contra lateral axial rotation
Describe internal oblique attachments
Perpendicular to ext
Post = tlf, iliac crest and Asis
Medial/ant = linea alba, pubic tubercle, xiphoid process
Describe internal oblique fucnitons
Ipsilateral flexion and rotation
How does rectus sheath change
Aponeurosis of all the msucles encase rectus abdominus
Describe transervsus abdominus attachments
Transverse orientation
Post/lateral = tlf, iliac crest, inner cartilages t6-t12
Ant = linea alba, pubic crest
Describe transervsus abdominus Fucntion
Compress abd contents = intrabdominla pressure
Describe where superior and inferior epihastri arteries come from
Internal thoracic —> superior epigastric
External iliac —> inferior epigastric
Describe linea semilunaris
Aponeurosis comes in and converges — fascia of 3 msucles
On rectus abdominus
Describe above accurate line
Aponeurosis ext oblique and 1/2 internal
Rectus abd
1/2 internal oblique anf transversus abdominus
Describe below accurate line
Rectus against transversalis fascia
Name and describe all hiatuses of diaphragm
Ivc = t8
Aorta = t12
ESO= t10
Name and describe all arcuate ligaments
Median = aorta under, equivalent to aortic hiatus
Medial = Psoas under
Lateral = quadratus lumborum under
Describe iliacus
Attach to iliac fossa and assist in hip flexion - bc attaches to femur
Describe iliopsoas
Attaches to lesser trochanter of femur - psoas major an iliacus come together
Describe psoas minor attachment
T12-l1 to pubis
Describe psoas minor fucntion
Lumabr flexion
Describe psoas minor innervation
Ant rami l1
Describe psoas major innervation
Ant rami l1-l3
Describe psoas major Fucntion
Assist with lumbar flexion and hip flexion
Describe psoas major Attachments
Vertebral bodies t12-l4 to lesser trochanter femur
Describe quadratus lumborum attachments
Iliac crest to rib 12
Attaches to l1-4 tps
Describe quadratus lumborum Innervation
Ant rami t12-l4
Describe quadratus lumborum Fucntion
Closes space
Bilateral extension
Unilateral ipsilateral lateral flexion
