2. Identify the parts in the saginal seetion of dhe bi cerebeltem,crum Cere betu

Question

2. Identify the parts in the saginal seetion of dhe bi cerebeltem,crum Cere betum- 3. What are the differences y between the human and the sheep brain? Part of the Brain Sheep Position of brain stem relative to cerebrum Size of cerebrum Number gyri/sulci in cerebrum Size of olfactory bulb Size of pineal gland MAKE THE CONNECTION I. A woman gives birth to child who appeared normal, but whose head started to expand rapidlya after birth. The physician informed her that the size of the head is greater than normal and he believes that the baby has hydrocephalus. He explains that normally, CSF is reabsorbed but that is not happening in the case of her baby Where is CSF produced? What structures in the cranium normally reabsorb the CSF? Considering the stage of ossification, what allows the head to enlarge? What sort of intervention could be performed? 132

Explanation / Answer

1. CSF is produced from the arterial blood by the choroid plexuses of the lateral and the fourth ventricle by the process of diffusion and active transfer.A small amount of it is also produced by ependymal cells.

2. CSF returns to the vascular system by entering the dural venous sinuses via the arachnoid granulations.CSF also drains into the lymphatics near the nose via drainage along the olfactory nerve through cribriform plate.

3.Enlargement of skull depends on the sutural growth and the differentation of osteoprogenitor cells in to bone matrix secreting osteoblasts.

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