SPCH 311 Lecture Notes - Lecture 7: Diencephalon, Retina, Dyslexia
2 Oct 2016
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The brain weighs approximately 3 pounds and comprises about 2% of body weight. In comparison to our body size, it"s very large, but is scrunched up. The total number of neurons in our brains is what sets us apart cognitively from other creatures. The surface of the brain is called the cerebral cortex and it is made up of neuronal cell bodies, which are gray and consists of dendrites (gray matter) and white (white matter) which consists of myelinated neuronal axons. Protection and nourishment of the cerebrum: the meninges. Just as our skull protects the brain tissue from outer forces, the meninges add another layer of protection for the brain. Csf cushion, which acts as a shock-absorbing cushion. **note: blood vessels that run on the surface level of the brain are located on top of the pia mater in the subarachnoid space (fig 7-1, page 110: the blood-brain barrier.
