internal capsule
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INTERNAL CAPSULE
AMUTHAMEENA MANOHARAN
THIAGGU PALAN
JAYAGANTHAN MANAUGAR
MOHD ZAHIR
HIGHLIGHTS…
INTRODUCTION PARTS OF INTERNAL CAPSULE BLOOD SUPPLY
WHITE MATTER OF CEREBRAL HEMISPHERE Association tracts (fibers)- different
regions in cerebral cortex
Projection tracts (fibers)- cerebral cortex other masses of gray matter
Commissures fibers- R L
This is a compact bundle of fibres through which the large collections of fibres pass
PARTS OF INTERNAL CAPSULE1. ANTERIOR LIMB
- Caudate nu. & lentiform nu.
2. GENU3. POSTERIOR LIMB
- Thalamus & lentiform nu.
4. RETROLENTIFORM5. SUBLENTIFORM
COMPONENTS ANTERIOR LIMB
Anterior thalamic radiation Frontopontine
GENU Part of superior thalamic radiation Frontopontine Corticonuclear
POSTERIOR LIMB Superior thalamic radiation Frontopontine Corticonuclear (corticobulbar) Corticospinal Extrapyrimidal
RETROLENTIFORM Post thalamic radiation - Optic radiation Parieto-pontine Temporo-pontine
SUBLENTIFORM Inf thalamic radiation - Auditory radiation
Thalamocortical fibres
Corticopontine fibres
Corticonuclear &corticospinal fibres
Connections:ANTERIOR LIMB
Anterior thalamic radiation Frontopontine
GENUPart of superior thalamic radiationFrontopontineCorticonuclear
– RETROLENTIFORM• Optic radiation• Parieto-pontine• Temporo-pontine
– SUBLENTIFORM• Auditory radiation
POSTERIOR LIMBSuperior thalamic radiationFrontopontineCorticonuclear (corticobulbar)CorticospinalExtrapyrimidal
BLOOD SUPPLY
Lateral striate fr middle cerebral artery Ant limb Genu Post limb Basal ganglia
Medial striate fr anterior cerebral artery Ant limb Genu Basal ganglia
Ant choroidal fr internal carotid Post limb Retrolenticular part
Anterior choroidal A
Middle cerebral A
Anterior cerebral A
Internal carotid A
Internal capsule
Lenticulostriate arteries
Middle cerebral arteryInternal carotid artery
Anterior cerebral artery
Medialstriate arteries
CORONAL SECTION
Left middle cerebral artery
Rightmiddle cerebral artery
MedialstriateACA
Lateralstriate- MCA
CORONAL SECTION
*Anterior choroidal A
Middle cerebral A
Anterior cerebral A
Medial striate - ACA
REFERENCE1. Dr. Israa lecture note2. Clinical neuroanatomy snell3. Human neuroanatomy inderbir singh
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