Summary
Samenvatting MSK 3 - TWZ - D Lambeets
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Samenvatting onderdeel TWZ, binnen het vak MSK3, gedoceerd door D Lambeets
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De thoracale wervelkolom – D. LambeetsInleiding
Thoracale wervelzuil (TWZ) = Dorsale wervelzuil (DWZ)
1. Morfologische specifieke kenmerken
• Ribben en thorax
• Costovertebrale gewrichten
• Verhouding discus/ corpus
• Grootte proc spin en trans
à Invloed op het functioneren
2. Functionele indeling
Hoog – midden – laag TWZ
• Hoog TWZ: T1 – T4
• Midden TWZ: T5 – T8
• Laag TWZ: T9 – T12
Hoog – laag TWZ
• Hoogthoracaal: T1 – T8
• Laagthoracaal: T9 – T12
Overgangsgebieden: CTO en TLO
3. Functies
• Steun – stabiliteit – draagvermogen
• Mobiliteit
• Bescherming
o Bescherming van viscera
o Ademhaling
, Morfologische kenmerken
1. Corpus
• Niervormig
• A – P diameter = dwarse
• Wigvormig in sagittaal vlak
• Beetje uitgehold
• Relatief hoog corpus
• Relatief nauw canalis vertebralis
• Relatief lange proc spin en trans
2. Discus intervertebralis
• Relatief dun
• Weinig discogene klachten thoracaal
o Relatief klein deel v achterzijde foramen intervertebrale wordt gevormd door discus
3. Facetgewrichten
Gevormd door
• Facies articularis superior onderliggende wervel
• Facies articularis inferior bovenliggende wervel
Morfologie
• Junctura synoviales
• Fac art sup
o Vlak of licht convex
• Fac art inf
o Vlak of licht concaaf
Oriëntatie thoracale facetten
• Fac art sup: dorsaal, lateraal en craniaal
• Fac art inf: ventraal, mediaal en caudaal
• In transversaal vlak: 20° met frontaal vlak
• In sagittaal vlak: 60° met transversaal vlak
Kleine rol facetten TWZ in belastingsoverdracht
• Door bouw thoracale kyfose
• Door oriëntatie thoracale facetten
à Grootste deel vd belasting wordt thoracaal via corpus overgebracht (T1: 8% LG, T8: 33% LG, T12:
47% LG)
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