9-17-15 Notes - PSYC 370
9-17-15 Notes - PSYC 370 PSYC 370
Popular in Behavioral Neuroscience
Popular in Psychlogy
This 8 page Class Notes was uploaded by Ronni Cox on Sunday September 20, 2015. The Class Notes belongs to PSYC 370 at Kansas taught by Nancy Hamilton in Summer 2015. Since its upload, it has received 114 views. For similar materials see Behavioral Neuroscience in Psychlogy at Kansas.
Reviews for 9-17-15 Notes - PSYC 370
If Ronni isn't already a tutor, they should be. Haven't had any of this stuff explained to me as clearly as this was. I appreciate the help!
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/20/15
91715 The Central Nervous System Development and function 0 Overview of a systems approach to Neuroscience 0 Sensorimotor systems Examination of how neurodevelopment lays these pathways for a neural systems The brain is not just a big lump of playdoh 0 Diffusion Tensor imaging DTMRI 0 Maps tracts of axons that connect different parts of the brain by measuring the diffusion of water molecules action potentials 0 Tracts of axons are laid out during prenatal neural development 0 The neurons travel from one lobe to another They are all linked o Tracts of neurons begin with the optic nerve that travel to thalamus and occipital lobe 6 Better representation of Axons A systems approach 0 Instead of a visual system it would be better to think about 0 A behavior orientation system I Audiovisualmotor system 0 You automatically react to something without thinking about it If a ball comes ying towards your face you block your face without thinking about it 0 an object identification system o a reading and writing system I audiovisualcognitive system 0 coordinated sensory motor responses I Motortactileaudiovisual system 0 Being able to move around and hearing and seeing things all at the same time While be 0 ing able to react to What is around you Like playing basketball Why does this matter 0 Understanding how information from different specialized regions of the brain are combined to perform specialized actions will help to understand how the brain is Wired o Tracts of neurons bundles of Wires that I Can communicate With other neurons Within a specific region e g frontal lobe Can8tocPhotocsp6477385 Different colored Wires represent different parts of the brain and they can communicate With each other at the same time I And transmit information from one part of the brain to another visual cortex to the somatosensory cortex and the motor cortex so that you can do complicated stuff like throw a ball Big picture 0 Stimuli in environment stimulate afferent neurons in the peripheral Nervous system PNS o If you hear something from the environment your neurons receive that information o Receptors TRANSDUCE environmental information into CNS code 0 The receptors of the neuron convert the sound into a secret code that only the Central Nervous system knows 0 Code is transmitted to the CNS via an information stream 0 Spinal cordCranial Nerves 9 brainstem o Thalamus 0 Primary cortex 0 That information is like a note in a bottle that is sent down a stream Where the information is sent to Where it needs to be sent I Visual information occipital lobe I Auditory information temporal lobe I Tactile information parietal lobe 0 Association cortices Information streams merge and interact With other information streams merge and interact With other information streams to enable complex perceptual processing and behaVioral responses 0 Information gets combined 0 Posterior parietal association cortex PPAC o Dorsolateral pre frontal cortex DPAC L I I Curl rod 9 iwm oc g N9 woos A quot 13w r y 3 A s A i I SYE QM J I e I 39 a C36 Q quot 39 quot quot4 5 IQSSOCQ Q QVMCQS a a i 39 a a M I f ll a Affk it s A 2 Former Model Current Model Secondary Sensory Cortex r u 4 W H H unaware z wt Receptors Principles of sensory system organization 0 Hierarchical organization 0 Complexity increases with each level 0 Sensationlowest level detecting a stimulus o Perception highest level understanding the stimulus 0 Parallel processing simultaneous analysis of signals along different pathways 0 This is a cereal process It all happens at once 0 Like your mom who is super woman and does everything at one time like the superhero she is with her crazy magic 0 Functional segregation distinct functional areas within a level 0 Pain is all in your head because the wiring that connects your body to the brain If the wiring is broken you won t feel the pain Audiovisual pathways 0 0 Cochlear nerve ventures to o Brainstem tectum I Inferior colliculi locate sound in space 0 Oriental response 0 Not stop and think about what you do when you have a new stimulation but you just do it You don t stop and think about what a loud sound is you just look in the direction the sound came from It s something you just do I Cued by auditory stimulation and then look 0 Thalamus relay station I Primary auditory processing 0 Primary auditory cortex responds to basic properties of sound pitch volume etc 0 Secondary auditory cortex decodes more complex sounds Optic nerve projects to o Brainstem tectum I Superior colliculi SC locate image in space 0 Thalamus relay station I Primary visual processing 0 Primary visual cortex responds to basic properties of vision contrast orientation 0 Secondary auditory cortex decodes more complex visual images Behavior orienting response 0 SC projections to motor neurons controlling head and eye movement I Inferior colliculi and Superior colliculi Association Cortex o Dorsal stream 9 PPAC posterior Parietal association cortex I Behavior Where is it 0 Need to know Where objects are in relation to you 0 Ventral stream VAC Visual association cortex I Behavior What is it 0 Hearing and language Association cortex converging streams of information 0 Where is object 39A a 2 im 7 l quot tr 39r meme 0quot o Dorsal stream 9 PPAC visual information combined With auditory and tactile information o Behavioral control path directs interactions With objects 0 The streams are axons 0 What is object o Ventral Stream 9 VAC 9 Visual information combined With auditory and lexical information in temporal lobe o Conscious perception conscious recognition of objects Sensory motor pathways 0 A sensorimotor response follows one basic principle 0 Motor output is guided by sensory input Tactile sensation 0 Network of receptors in skin muscle and joints project to o Spinal cord Brainstem various regions more later Thalamus relay station 0 Primary pain and tactile processing Primary somatosensory cortex 0 Homonuclus body map 0 Where do I feel that Secondary somatosensory cortex 0 More complex sensation Association cortex Posterior Parietal Association Cortex PPAC Posterior parietal Association Cortex 0 Input from 0 Visual auditory o Somatosensory systems parietal lobe 0 Output to o Dorsolateral prefrontal association cortex DPAC 0 Secondary and primary motor cortices o Frontal eye field o Basal ganglia Overview of the fetal development the macro level The process is kind of like building a house quot w EL 31 mail 0 First Trimester 3months weeks 012 0 Framing a house 0 Second trimester 3 months weeks 1324 0 hooking up the wiring 0 Third trimester 3 months weeks 2436 0 making sure that it works First trimester 0 First 12 weeks 84 days following the mother s last menstrual cycle 0 framing the house building blocks 0 Somatic structures 0 Organs 0 Basic brain structures Major structures of the brain 0 Conception 18 days 23 weeks 0 Development of the nervous system begins 0 Nervous system develops from a layer of epidermal cells in the embryo called the Neural plate 0 Neural plate folds over on itself to form the neural tube 0 Within the first 30 days 3 4 weeks 0 Neural tube develops 3 interconnected chambersswellings 0 Chambers become ventricles 0 Walls of the chambers walls become forebrain midbrain hindbrain Induction from a zygote to a stem cell 0 Ovum sperm zygote 0 Neural plate formed from a patch of tissue on the dorsal surface of the embryo o Caused by chemical signals from the mesoderm the organizer 0 Proliferation neural plate folds to from the neural groove which then fuses to form the neural tube 0 Mitosis triggered by chemical signals from the organizer in the neural plate 0 inside out 0 During the first trimester the walls of the forebrain midbrain and hindbrain continue to thicken and differentiate However the brain is still mostly ventricle Second trimester 0 Week 1224 0 hooking up the wiring o 11 weeks heart beat can be detected 0 12 weeks noncortically controlled re exive motor movement e g withdrawal re ex I No brain so no sensory o 18 weeks motor neurons connecting muscles to nerves are now developed I Myelination of somatic nerves 0 19 weeks behavioral response to light facial movementsexpressions yawn suck swallow hiccup o 20 weeks 0 Brain is 50m long 0 Shape of the mature brain 0 Brain gt Ventricle Third trimester 0 Neural development making sure it all works together 0 Dendritic branching o Neural proliferation 0 7th month neural development mostly complete 0 8th month myelination of CNS beginning From the macro to the micro 0 Proliferation and differentiation how do all the
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'