Trigeminal or Meckel's cave is present in relation to:

Meninges of Brain i) Brain is protected by Bony covering of the cranium Three membranous coverings (Meninges) ii) The three meninges are Outer duramater Middle arachnoid mater Inner piamater iii) The dura mater is outermost and thickest of all meninges. It encloses cranial venous sinuses and has a distinct blood supply and nerve supply. iv) The duramater has two layers - an outer endosteal layer and an inner meningeal layer. v) The outer endosteal layer forms the endosteum of skull. vi) The meningeal layer is folded and form partitions which divide cranial cavity into compartments. The folds are falx cerebri falx cerebella Tentorium cerebella Diaphragma Sella. vii) FALX CEREBRI It is a large sickle shaped fold of duramater occupying the median longitudinal fissure between two cerebral hemispheres. The superior sagittal sinus, inferior sagittal sinus and the straight sinus are closely related to falx cerebri. viii) FALX CEREBELLI It is present in the posterior cerebellar notch. ix) TENTORIUM CEREBELLI It forms the roof of the posterior fossa and separates the cerebellum from occipital lobes of the cerebrum. The trigeminal or meckel's cave is present in relation to tentorium cerebelli. x) DIAPHRAGMA SELLAE It is a small circular, horizontal fold of duramater forming the roof of the hypophyseal fossa. The diaphragm has a central aperture through which the stalk of hypophysis cerebri passes.