The Vertebral Column and Thoracic Cage · C-1 the Atlas The superior arLculang facets receive the...
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Bio 230 Dr. Carla Sweet The Vertebral Column and Thoracic Cage
Transcript of The Vertebral Column and Thoracic Cage · C-1 the Atlas The superior arLculang facets receive the...
Bio230Dr.CarlaSweet
TheVertebralColumnandThoracicCage
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AxialSkeleton:protectsthebrain,spinalcord,andvisceralorgansofthechest
Vertebrae:conductbodyweighttothelowerlimbsLowervertebraearelargerandstronger:
becausetheybearmoreweight
4VertebralCurvaturesseenintheadult
2°
1°
2°
1°
GeneralCharacterisLcsofaTypicalVertebra
Thevertebralbody:transfersweightalongthespine
Thevertebralarch:posteriormarginofvertebralforamenGreenindiagram.
ThearLcularprocesses:lateralprojecLonsbetweenlaminaeandpedicles
Ar9culatedvertebrae
Besuretounderstandthedifferencebetween:1. vertebralforamen2. intervertebralforamen3. vertebralcanal
GeneralRegionalCharacteris9csofVertebrae
Cervicle7-(typical)-haveatransverseforamenIneachtransverseprocess-thespinousprocessofC3-6Areshort&bifed
Thoracic-12--havearLcularfacetsforribs(bingo!)-thespiniousprocessestendtobelong,slender&pointdownward
Lumbar-5--havelargebodies-thickbluntspiniousprocesses
VertebralRegions-Vertebraearenumbered:byregion,fromtoptoboXomC1arLculateswithskull,L5withsacrum
Vertebraeofeachregion:havecharacterisLcsdeterminedbyfuncLons
Nerverootsoffthespinalcordleavingtheintervertebralforamen
Herniateddisc,compressingonnerve!Whatregionisthisfrom?Lookatvertebra
_____lamina
IntervertebralDiscs
-ArepadsoffibrocarLlage-Separatethevertebralbodies-Absorbshocks
The Cervical Vertebrae (C1-C7)
• C1(atlas)hasnobodyorspinousprocess• smallbodiesontherestofcervicalvertebrae(supportonlyhead)
Whoisthisman?AndwhyisheincludedIn
thisstudyoftheVertebralColumn?
HeisATLAStheGreekGodwhosupportedtheworld!
WeeachhaveourownAtlasThatsupportsuseveryday.
MeetC-1……..AKA…….ATLAS
YourheadsitsOnyourownAtlas!GivethankstothisMightyvertebraC-1ROCKS!
WhatistheAtlasarLculaLngwithontheskull?
C-1theAtlasThesuperiorarLculaLngfacetsreceivetheoccipitalcondylesToformtheAtlanto-OccipitalJoint
-theAtlashasnospinousprocess-hasnobody(whoneedsabodywhenyousupporttheworld!)
C1(Atlas)meetsC2(Axis)andnowwecanrotateourheads!
DensisGreekfor“Tooth”-theDenslookslikeatooth(DenLst)
The Thoracic Vertebrae (12) all articulate with the ribs
The Lumbar Vertebrae (5)
1. largestvertebrae2. oval-shaped,largebodies(supportrestofvertebralcolumn)
The Sacrum and Coccyx
Figure 7–21
Sternum
Clavicularnotches-----------(arLculatewithclavicles)
Jugularnotch-------------
lateralview
Sternalangle-wheremanubriumarLculateswithbody.Canfeelthis______________________.Clinicallyimportant,siteofrib#2.
Sternum=thefusionof3bones1.manubrium2.body3.xyphoidprocess
Ribcage=sternum+ribs
Next…theappendicularskeleton!
