Week 6 - 1 2/22/08 PNS to CNS Overview of the Brain....

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Unformatted text preview: 1 2/22/08 PNS to CNS Overview of the Brain. Somato-Sensory Systems Information from PNS to CNS Anatomy Know the lobes of the brain. Cranium Brain/Brainstem/Spinal Cord Eyes rest on bottom of the frontal lobe Cortical Functions processing of information coming in attribute to thought - associating the stimuli, not reflex or ability to walk.- Cortex that cats dont have or lemurs dont have Humans and dolphins also have it. Cortical functions are higher than is necessary to survive. - Dolphins sleep . o How do dolphins not sink when they sleep? They do not have a basal system. o They sleep one half of brain at a time. Bilateral Symmetry o Also, bilateral asymmetry, dividing functions between two sides of brain. Basal Functions control sleep, regulation of body functions and is controlled by the brainstem. o Ducks do same thing that dolphins do first and last duck in the line have one eye open. Half of the brain is asleep Loss of Function major theme o Understand Lateral symmetry and what would happen if there is a damage to a smaller area of the brain or the larger part of the brain. Loss and Gain of Function constant theme 2 Visceral Motor System smooth, cardiac muscles and glands. Internal/External environment Sensory Components Processing Motor Components Effectors Development of CNS Brain develops in the same way in many organisms. The major difference between the forebrain [prosencephalon] and midbrain [mesencephalon] and hindbrain [rhombencephalon]. The hindbrain is the junction zone between the spinal cord and the midbrain. As there is more development there are processes that refine the ability to process things. diencephalon is the thalamus - Part of the forebrain is the gateway to the brain. In general, there is a forebrain, midbrain, and a cerebellum and a hindbrain portion and then the spinal cord. The thinking part, the cortex is not doing much. The vast majority of action is happening in the brainstem . 3 Central sulcus grooves. The bumps are called gyrus (singular). There is a primary central sulcus and then there is the lateral fissure and the brain is divided into left and right hemispheres. The midbrain is an isolated structure, it does things that are largely so built in and innate that that there is almost no development during life. However, the forebrain is largely involved in processing in things that we dont necessarily need. Example : Terry Schaivo. Without of the forebrain, the person will be almost normal. Ability to track with the eyes is because of the midbrain. Terry couldnt see because her visual cortex was not functional. Her eyes functioned but her visual cortex was not working....
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Week 6 - 1 2/22/08 PNS to CNS Overview of the Brain....

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