The sagittal strata are regions of white matter in the posterior brain located around the atria and occipital horns of the lateral ventricles.
Gross anatomy
The precise anatomical definition has not been agreed upon, but these borders have been proposed 1:
- medial: tapetum and ventricular ependyma
- lateral: superior longitudinal fasciculus/arcuate fasciculus complex
- anterior: uncinate fasciculus
- inferior: inferior longitudinal fasciculus (also considered a component of the sagittal stratum)
- superior and posterior: not clearly defined but continuous with corona radiata
The bundle is a polygonal structure originates posteroinferior to the inferior limiting sulcus of the insula and ends in the posterior temporo-occipital-parietal cortex 2.
The sagittal strata comprises the following fiber bundles 1-3:
- superficial layer
- middle layer
- deep layer
- optic radiations
- fibers from the anterior commissure
- other posterior thalamic radiations (directed to nonvisual cerebral cortex)
Clinical importance
The sagittal strata are involved in language processing and visual information 2.
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