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| Corona radiata | |
|---|---|
 Dissection showing the course of the cerebrospinal fibers. | |
| Details | |
| Identifiers | |
| Latin | corona radiata |
| NeuroNames | 1446 |
| NeuroLex ID | nlx_anat_090903 |
| TA98 | A14.1.09.550 |
| TA2 | 5575 |
| FMA | 18661 |
| Anatomical terms of neuroanatomy | |
Inneuroanatomy, thecorona radiata is awhite matter sheet that continues inferiorly as theinternal capsule and superiorly as thecentrum semiovale. This sheet of both ascending and descendingaxons carries most of the neural traffic from and to thecerebral cortex. The corona radiata is associated with thecorticopontine tract, thecorticobulbar tract, and thecorticospinal tract.
Projection fibers areafferents carrying information to thecerebral cortex, andefferents carrying information away from it. The most prominent projection fibers are the corona radiata, which radiate out from the cortex and then come together in thebrain stem. The projection fibers that make up the corona radiata also radiate out of the brain stem via theinternal capsule. Cerebralwhite matter is viewed as an intricately organized system of fasciculi that facilitate the highest expression of cerebral activity.
Evidence from subcortical small infarcts suggests thatmotor fibers aresomatotopically arranged in the human corona radiata. Following subtotal brain damage, localization of the corticofugal projection in the corona radiata andinternal capsule can assist in evaluating a patient's residual motor capacity and predicting their potential for functional restitution. Data suggests that the corona radiata and superior capsular lesions may correlate with more favorable levels of functional recovery. Lesions seated inferiorly are likely to correlate with poorer levels of recovery regarding upper limb movement. Findings also suggest that motor deficit severity is likely to increase as a lesion occupies progressively more posterior regions of the internal capsule.[citation needed]
Thecorona radiata may be affected by diseases affecting the cerebralwhite matter, including ischemicleukoencephalopathy,multiple sclerosis, and progressiveleukoencephalopathy. These may have major effects on intellectual, social, and emotional functioning.[citation needed]
Innormal pressure hydrocephalus, expansion of the lateral ventricles causes distortion of the fibers of the corona radiata. This contributes to the urinary incontinence seen with NPH.
