Corpus: Insular lobe
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Synonyms: Lobus insularis, insula, island, Reil's island
English: , insular cortex
Definition[Bearbeiten]
The insular lobe is a concealed part of the cerebral cortex (cortex cerebri) in the depth of the sulcus lateralis cerebri. It was overgrown by other parts of the cerebral cortex in the course of development.
Anatomy[Bearbeiten]
The islet is hidden by parts of the brain lobes that overgrow it, the so-called opercula:
- Operculum frontale
- Operculum parietale
- Operculum temporale
- Operculum orbitale
The islet is bordered on the inside by the capsula extrema.
The islet is anatomically separated from the overlying opercula by the sulcus circularis - which is why it was given its name. This covering is also referred to as opercularisation. Access to the insula is via the limen insulae ("insular threshold"), which is connected basally to the lateral border of the substantia perforata anterior.
Vessels[Bearbeiten]
The insular flap is supplied by the M2 segment of the middle cerebral artery.