Anatomy of internal capsule

INTERNAL CAPSULE Dr. Israa M. Sulaiman Department of Anatomy IMS/MSU

[object Object],[object Object],[object Object],OBJECTIVES

Gray & White Matter Organization ,[object Object],[object Object]

White Matter of Cerebral hemisphere ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Coronal section

[object Object],[object Object],[object Object],[object Object]

Commisural fibres ,[object Object],[object Object],[object Object],[object Object],[object Object]

Association fibres ,[object Object],[object Object],[object Object],[object Object],[object Object]

Projection fibres ,[object Object]

[object Object],[object Object],[object Object],DEFINITION

[object Object],[object Object],The thalamocortical and corticothalamic fibres; corticopontine , corticobulbar and corticospinal fibres pass through the internal capsule lesions .

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Portion Description Origin Destination Anterior Limb Anterior thalamic radiation ,[object Object],[object Object],[object Object],[object Object],Genu Relays to motor areas ,[object Object],[object Object],[object Object],[object Object],Posterior Limb ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Retrolenticular ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Sublenticular ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CAUDATE NUCLEUS LENTIFORM NUCLEUS THALAMUS Globus palidus Putamen CLAUSTRUM Internal capsule External capsule Extreme capsule

1 st order 2 nd order 3 rd order Internal capsule Corona radiata

Lower motor Upper motor Internal capsule Corona radiata

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Parts of internal capsule Caudate n Lentiform n Thalamus

Parts of internal capsule Caudate nucleus Lentiform nucleus Thalamus Anterior limb Posterior limb Genu Thalamocortical fibres Corticopontine fibres Corticonuclear & corticospinal fibres Sublentiform Retrolentiform

Types of fibres Superior Inferior Anterior Posterior

Types of fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Superior Inferior Anterior Posterior

Thalamic radiation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

COMPONENTS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Thalamocortical fibres Corticopontine fibres Corticonuclear & corticospinal fibres Inferior Thalamic radiation Posterior Thalamic radiation

COMPONENTS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Thalamocortical fibres Corticopontine fibres Corticonuclear & corticospinal fibres Inferior Thalamic radiation Posterior Thalamic radiation

Thalamocortical fibres Corticopontine fibres Corticonuclear & corticospinal fibres ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Middle cerebral artery Anterior cerebral artery Posterior cerebral artery BLOOD SUPPLY

BLOOD SUPPLY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],HORIZONTAL SECTION

Anterior choroidal A Middle cerebral A Anterior cerebral A Internal carotid A

Internal capsule Lenticulostriate arteries Middle cerebral artery Internal carotid artery Anterior cerebral artery Medialstriate arteries CORONAL SECTION

Left middle cerebral artery Right middle cerebral artery Medial striate ACA Lateral striate - MCA CORONAL SECTION

* Anterior choroidal A Middle cerebral A Anterior cerebral A Medial striate - ACA

ANTERIOR LIMB ,[object Object],[object Object],- pass through the lentiform N to supply the striate

GENU ,[object Object],[object Object],[object Object]

POSTERIOR LIMB ,[object Object],[object Object],[object Object],[object Object]

CAUDATE NUCLEUS LENTIFORM NUCLEUS THALAMUS Globus palidus Putamen CLAUSTRUM INTERNAL CAPSULE

CAUDATE NUCLEUS LENTIFORM NUCLEUS THALAMUS Globus palidus Putamen CLAUSTRUM EXTERNAL CAPSULE Projection fibres from cerebral cortex to basal ganglia and midbrain

APPLIED ANATOMY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

* Anterior choroidal A Middle cerebral A Anterior cerebral A

Anatomy of internal capsule

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