Internal Capsular Stroke: Difference between revisions
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== Introduction == | == Introduction == | ||
The internal capsule, a white matter structure, is a unique location where a large number of motor and sensory fibers travel to and from the cortex. Damage of any kind in this location will cause some relatively unique findings that can allow you to localize the lesions to the internal capule by exam alone.<ref name=":0">Stanford medical Introduction to Internal Capsular Stroke<nowiki/>https://stanfordmedicine25.stanford.edu/the25/ics.html (Accessed 30.7.2021)</ref> | |||
== | == Structure == | ||
The internal capsule is a deep subcortical structure that contains a concentration of afferent and efferent white matter projection fibres. Anatomically, this is an important area because of the high concentration of both motor and sensory projection fibres. Afferent fibres pass from cell bodies of the thalamus to the cortex, and efferent fibres pass from cell bodies of the cortex to the cerebral peduncle of the midbrain. Fibres from the internal capsule contribute to the corona radiata.<ref>Radiopedia Internal Capsule Available: https://radiopaedia.org/articles/internal-capsule ( accessed 30.7.2021)</ref> | |||
== Anatomy == | |||
'''Location''' | |||
* The internal capsule is one of the subcortical structures of the brain. | |||
* Subcortical structures: internal capsule, caudate, putamen, globus pallidus, thalamus, brainstem | |||
* The anterior limb of the internal capsule separates the caudate nucleus and lenticular nucleus | |||
* The posterior limb separates the thalamus and lenticular nucleus | |||
'''Types of fibers''' | |||
* Anterior limb: frontopontine fibers (frontal cortex to pons), thalamocortical fibers (thalamus to frontal lobe) | |||
* Genu (angle): corticobulbar fibers (cortex to brainstem) | |||
* Posterior limb: corticospinal fibers (cortex to spine), sensory fibers | |||
'''Blood Supply''' | |||
* Anterior limb: mainly fed by the lenticulostriate branches of middle cerebral artery(MCA), less often branches of anterior cerebral artery (ACA) | |||
** The lenticulostriate arteries are small penetrating blood vessels that supply blood flow to most of the subcortical structures. | |||
* Genu: lenticulostriate branches of MCA | |||
* Posterior limb: lenticulostriate branches of MCA & anterior choroidal artery (AChA) of internal carotid artery<ref name=":0" /> | |||
== Sub Heading 3 == | == Sub Heading 3 == | ||
Revision as of 01:27, 30 July 2021
Original Editor - User Name
Top Contributors - Lucinda hampton and Dinu Dixon
Introduction[edit | edit source]
The internal capsule, a white matter structure, is a unique location where a large number of motor and sensory fibers travel to and from the cortex. Damage of any kind in this location will cause some relatively unique findings that can allow you to localize the lesions to the internal capule by exam alone.[1]
Structure[edit | edit source]
The internal capsule is a deep subcortical structure that contains a concentration of afferent and efferent white matter projection fibres. Anatomically, this is an important area because of the high concentration of both motor and sensory projection fibres. Afferent fibres pass from cell bodies of the thalamus to the cortex, and efferent fibres pass from cell bodies of the cortex to the cerebral peduncle of the midbrain. Fibres from the internal capsule contribute to the corona radiata.[2]
Anatomy[edit | edit source]
Location
- The internal capsule is one of the subcortical structures of the brain.
- Subcortical structures: internal capsule, caudate, putamen, globus pallidus, thalamus, brainstem
- The anterior limb of the internal capsule separates the caudate nucleus and lenticular nucleus
- The posterior limb separates the thalamus and lenticular nucleus
Types of fibers
- Anterior limb: frontopontine fibers (frontal cortex to pons), thalamocortical fibers (thalamus to frontal lobe)
- Genu (angle): corticobulbar fibers (cortex to brainstem)
- Posterior limb: corticospinal fibers (cortex to spine), sensory fibers
Blood Supply
- Anterior limb: mainly fed by the lenticulostriate branches of middle cerebral artery(MCA), less often branches of anterior cerebral artery (ACA)
- The lenticulostriate arteries are small penetrating blood vessels that supply blood flow to most of the subcortical structures.
- Genu: lenticulostriate branches of MCA
- Posterior limb: lenticulostriate branches of MCA & anterior choroidal artery (AChA) of internal carotid artery[1]
Sub Heading 3[edit | edit source]
Resources[edit | edit source]
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References[edit | edit source]
- ↑ 1.0 1.1 Stanford medical Introduction to Internal Capsular Strokehttps://stanfordmedicine25.stanford.edu/the25/ics.html (Accessed 30.7.2021)
- ↑ Radiopedia Internal Capsule Available: https://radiopaedia.org/articles/internal-capsule ( accessed 30.7.2021)
