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Lecture

oct 9 lec notes.doc

2 Pages
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Department
Physiology
Course Code
PSL201Y1
Professor
Michelle French

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• [p[][The brain is mostlt anatomy and memorizing – forebrain has a right and left hemishphere • The brain is very wrinkle so that it has more a surface area – the saying that we only using 2 percent is bs since if we were not than it would not be so wrinkled up • Cut the brain in half – the forebrain is the largest part of the brain and the most powerful and comprises 80 percent of the mass brain • Cerebellum- it is involved in motor coordination and balance and damage to it means a damage to ones posture • Cerebral cortex- for higher function such as thinking –the picture has grey matter and white matter • A smooth brain would mean a less complex brain like a rat brain and these ridges and grooves • Frontal lobe is dealing with higher functions and movments • Temporal lobe is dealing with audition and occipital lobe is associated with vision • Do not memorize the functions but that different areas are dealing with different functions • The areas are mapped to the functions • The brain itself does not have any pain receptiors • Slide 26- this is bodeis thermostate • Slide 28- learning in motions, it informs a ring around the brain cell . Remember amygdala and hippocampus in these • Slide 29 - deals with fearful emotions and if you want to find the functions we have to take it out so we look for patients who have had damage. Other species like cats have these as well and if you damage a cat they will always be fighting for everything. If you damage this in a monkey they become hypersexual and in humans we do no know much. The hippocampus involves in learning and memory . This is the oldest part of the brain • Slide 32- circadian rhythms- day and night cycle . We have retinol inputs from the eye. This is the most importsnt sensor in the circadian rhythm to tell us about the day and night. It respondds to blue and green light and does not responf to a red light • Slide 33- the red part means that you do not need to memorize them but do read them. The pineal body is a tiny nucleaus that is in the middle and sits on top of the thalamus and is important for releasing melatonin a sleep hormone. The 24 cycle is important because many prematers we have is based on this cycle such as hormones since some are synthesized at night, our temperature, our moods, and our sleep cycle • Slide 35- acts as the master clock but we must know the action potential is max at day and low at night • Slide 37 - these adjustments are made by the pineal body such as the hormones . The pineal body is activated by darkness and produces melatonin and we need it for induction sleep. The pineal body is sensitive to blue and green light . The max secretion of the pineal body is at 2 am and starts to decrease as we start going into the day • Slide 38- we do not have any seasonal variation . Lets take a elephant for example and you have a alrm clock and when you start ringing it it wont get any slee and when u flash it make sure it does nto produce a red light because if you do it will get a good night sleep because when it is brue green light than it
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