LIFESCI 2C03 Lecture 14: Lecture 14
22 Feb 2012
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Document Summary
The skull bones are flat bones separated by suture-lines. They are not fused until 1-2 years after birth. This helps an easier delivery of the baby and allows room for bran development. They are fused by 1-2 years after birth. Layers of meninges: dura mater- the outermost dense layer, arachnoid mater - the middle layer, pia mater - the innermost closely adherent to the brain. Has dense innervation by pain-fibres via trigeminal nerve (5th cranial nerve) When the dura mater stretches it causes pain. Inner of the two layers fold along sagittal and transverse planes. The folds scaffold the hemispheres (falx cerebri) So your brain doesn"t move around, act like an anchor. Venous sinuses receive venous blood from the brain. Cerebrospinal fluid also drains into venous sinuses. Outer layer of dura is attached to the skull. Bending of neck -> hip and knee bend due to irritable meninges (a very important clinical sign for.
