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Half oval center
Half oval center
half oval center
The specific location is the white matter of the brain at the upper level of the corpus callosum (equivalent to the upper part of the lateral ventricle)
Here the medulla of the cerebral hemisphere is made up of three kinds of fibers:
Demyelinating lesions in the brain, such as multiple sclerosis, adrenal leukodystrophy, and tuberous sclerosis, often occur in single or multiple lesions in this area
The radially distributed projection fibers contain only projection fibers to the cortex.
Part)
Of course, the basal ganglia and thalamus are a different matter
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Half oval center
half oval center
Why is it called the semi-oval center?
Why is it called the semi-oval center?Answer: The center of the semi-oval is a morphological term, which is a collective term for a region of white matter.
The specific location is the white matter of the brain at the upper level of the corpus callosum (equivalent to the upper part of the lateral ventricle)
Half oval center This section passes just above the corpus callosum, and it can be seen that the medulla of the cerebral hemisphere forms the half oval center
.
Here the medulla of the cerebral hemisphere is made up of three kinds of fibers:
① Projection fibers: connect the cerebral cortex and subcortical structures, and radiate in a fan shape, called the radiation crown;
Projection fiber: Projection fiber:②Connecting fibers: connecting the cortex of the current hemisphere, the connecting fibers of the human brain are extremely developed, and compared with projection fibers and commissural fibers, their number is the largest;
Contact Fiber: Contact Fiber:③Commissure fibers: connect the corresponding cortical areas of the left and right cerebral hemispheres
.
The fiber in the center of the semi-oval is mainly myelinated fiber, so it shows high signal on MRI T1-weighted image and low density on CT image
.
Demyelinating lesions in the brain, such as multiple sclerosis, adrenal leukodystrophy, and tuberous sclerosis, often occur in single or multiple lesions in this area
Radiation crown (radiation crown)
Radiation crown (radiation crown) Radiation crown (radiation crown)What is a radiation crown?
What is a radiation crown? What is a radiation crown?The radial crown refers to the radial fibrous white matter from the inner capsule to the cerebral cortex.
The radially distributed projection fibers contain only projection fibers to the cortex.
Part)
The relationship between the two
The relationship between the two The relationship between the two
Half oval center
Radiation crown
Generally, the semi-oval center refers to the white matter area in the upper part of the ventricle (the lateral ventricle does not appear on the level), and the radial crown refers to the white matter level around the lateral ventricles on both sides
.
It can be simply understood like this:
It can be simply understood like this : It can be simply understood like this:The radius of the corona is larger than the center of the semi-oval.
The center of the semi-oval usually refers to the white matter area above the top of the lateral ventricle, which means that the lateral ventricle is no longer visible when the center of the semi-oval is seen
.
When writing a report, you can locate it like this:
When writing a report, you can locate it like this: When writing a report, you can locate it like this:The one above the top of the lateral ventricle is called the left/right semi-oval center.
If the lateral ventricle can be seen, it can be positioned by the anterior angle/posterior angle/side body of the lateral ventricle
.
Of course, the basal ganglia and thalamus are a different matter
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