meninx primitiva

The meninx primitiva refers to the mesenchymal covering of the brain from which the arachnoid mater, pia mater and dura mater are formed in mammals and birds. Both the dura mater (pachymeninges), and arachnoid and pia mater (leptomeninges) are largely mesodermal in origin, although apparently the innermost layer of the pia is neuroectodermal. Normally resorption occurs between the 8and the 10week of gestation.

Related pathology

• intracranial lipomas arise from persistence and maldifferentiation of the meninx primitiva

Siehe auch:

• Dura mater
• intrakranielle Lipome