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Ted Petit

PSYB65 Lecture 1 -2 TA’s; if you have any questions direct them to TA’s -intranet/internet email: [email protected] -office hours; see TA’s -human brain and how it controls behavior -prof. is a clinical psychologist and neuropsych -course is focused on humans – does not talk about animals -lectures are general, but need to get details from the textbook Over view of the human brain -slides are posted on the intranet -central nervous system – CNS -peripheral nervous system = PNS -we will mainly be discussing CNS; brain and the spinal cord are what makes up the CNS -PNS is made up of everything else; nerves that send info out to other parts of your body -CNS; spinal cord is continuous with the brain; if you take the whole thing out cant tell where one ends and the other begins; when it enters the whole in the back of the skull this is generally the separating point -brain; there are many ways of subdividing the brain -can be divided into fore/mid/hind brain; this is the easiest way to divide it Hindbrain -hindbrain; composed of 2 major things – 1-the cerebellum; involved with sensory motor integration – taking info from body and linking it together with motor info to control appropriately your body – eg. it allowed you to stand up -cerebellum sits on top of the hind brain -when you have damage to cerebellum can have problems standing up -CNS receives sensory info from outside world, then puts out info to control the muscles (motor control) 2-medulla; is the core of the hind brain; this is responsible for basic life processes – eg. Keeping you alive at the most basic level, heart beat and respiration. This is where the neurons are located that keep you alive basically. If you have a stroke in this area you are a goner. -brain stem; general term meaning the very back end of the brain 1 Midbrain -reticular formation is in midbrain; it is imp’t for controlling sleep/wakefulness cycles -if you damage this area you will be in coma b/c they do not wake up -anterior; toward the front -posterior; toward the back Forebrain -starting at the back (posterior) thalamus; beneath it is the hypothalamus -thalamus is a relay center; relayed forward to more modern parts of the brain in the human, in the primitive animal brains stops in the thalamus b/c there is nowhere more advanced to send it -hypothalamus; controls life processes in a more complex way; keeps ind. Alive over a long period of time, and the species alive over a long period of time -resp. for things like eating behavior, drinking, also involved in territoriality (fighting over territory) which usually involves fighting over resources b/c animals often have to fight over territory which is critical for survival, imp’t for survival of animal, their family and their group; associated with aggression and fighting -also responsible for sex; involves finding a mate, most animals sexual behavior controlled by smells (some animals emit a smell when they are ready to reproduce, in estrus, so it involves smelling this) -maternal behavior, reproductive things- controlled by hypothalamus -if it feels good, it is in the hypo -in humans, our sexual behav is not driven by odour, but these basic things are still controlled in hypo -4 F’s; finding, feeding, fighting, fucking Limbic System -system of interconnected brain parts -comprised primarily of amygdala, hippocampus, usually Olfactory bulb and hypothalamus -tightly interconnected brain structures that are involved in emotions and emotionality -humans have a highly evolved sense of emotion; in the most primitive animals they do not have a big emotional repertoire, (dogs, more evolved vs. snakes, more primitive), humans have a sophisticated emotional repertoire, much more complicated, emotionality in humans is a big component of our behavior and our world, so the limbic system is very important in humans Cerebral cortex – most anterior structure; also referred to as neo-cortex (neo=new) —this is what the average person thinks of as t
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