subcommissural organ

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sub·com·mis·sur·al or·gan

[TA]

a microscopic organ, made up of columnar ciliated ependymal cells, located in the cerebral aqueduct beneath the posterior commissure of the brain; it is believed to have a neurosecretory function.

Synonym(s): organum subcommissurale

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The epithalamus is the roof of the diencephalon and the postmedian epithalamus of its dorsal part is subcommissural organ. There are two long and thick optic nerve fibers in the back of the diencephalon.

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SCO-spondin is expressed in the subcommissural organ (SCO) and plays a role in neuronal development [51].

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