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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. Lambeets
Inleiding


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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