Anatomy and Physiology Week 3

This week we took the Quiz. It was pretty much as expected. The only problem I have is that I memorize the definition of certain things and then when I take the test I have to think of the word that I memorized the definition of. If that makes sense. This week we started talking about the parts that make up the brain. We discussed the midbrain, which is composed of the Corpora Quadrigemina(Superior Colliculi, Inferior Colliculi) and the cerebral aqueduct, also known as the aqueduct of sylvius. We also went over the brain stem, which is composed of the medulla oblangata, the pons and the midbrain. These sections of the brain serve as a relay station and control center. Later we discussed the 3 membranes surrounding the brain and spinal cord. The brain has the dura mater. It is the outermost layer(actually 2 layers together) and it holds major blood vessels. The middle layer in the brain is the arachnoid. It is weblike and contains no vessels. The innermost, known as the pia mater, has capillary networks throughout. The spinal cord has the same three membranes, the only difference is that the dura mater is only one layer as opposed to the two together around the brain.