L1 - Laura Montgomery - structure and function of CNS 0.0 / 5 ? PharmacyStructure and function of CNSUniversityNone Created by: RscottqubCreated on: 30-03-19 23:20 largest part if the brain cerebrum 1 of 48 2 halves of brain hemispheres 2 of 48 sulcus groves 3 of 48 gyrus folds 4 of 48 central sulcus lies between precentral and postcentral gyrus 5 of 48 what is the longitudinal fissure the "line" that splits the brain into 2 hemispheres 6 of 48 how do the 2 halves communicate via the corpus callosum 7 of 48 2 layers of cerebrum 1. outer grey matter 2. inner white matter 8 of 48 outer grey matter also called the cerebral cortex - has little myelin 9 of 48 inner white matter is myelin rich 10 of 48 Lobes of the cerebral cortex frontal, parietal, occipital, temporal * see diagram and know locations 11 of 48 Frontal intelligence , moral judgement , has motor area within the frontal lobe . speech 12 of 48 Parietal sensory 13 of 48 Occipital Vision 14 of 48 Temporal Auditory/hearing, contains Wernickes area- language and comprehension 15 of 48 the limbic system rings of intercolated structures below cerebralcorter 16 of 48 function of limbic system genorate emotions and motivational drives 17 of 48 motivational drives whether an experience activates punishment or reward responses 18 of 48 If you stim a punishment area feelings of fear/ defensive behavior in animals 19 of 48 if stim a reward area feeling of well being/ placid behavior in animals 20 of 48 How does the brian decide what to store as memory stimulation of reward/punishment areas 21 of 48 most potent reward center nucleus accumbens in hypothalamus 22 of 48 Illegal drugs many addictive drugs activate this reward response from the nucleus accumbens 23 of 48 Structures within the limbic system hypothalamus, amygdala, hippocampus 24 of 48 Hypothalamus controls homeostatic fucntions, ie body water, temp, hormones , hunger etc 25 of 48 Amygdala initiates sexual behavior- ie erection, ***********, ovulation 26 of 48 Hippocampus formation of longterm mems - since removal lose ability to form any longterm memories 27 of 48 how are memories stored as changes in sensitivity of synaptic transmission. thought to be stored in areas of brain whoch was activated by the experience 28 of 48 short term mems are temporary because of no structural changes 29 of 48 temporal lobe is also important for mems- evidence? removal - resulted in loss of ability to form 30 of 48 Thalamus mass of grey matter under cerebral hemispheres but above brain stem - "splat bang center of brain from all angles" 31 of 48 almost all sensory neurones pass on way to cortex true 32 of 48 thalamus if oftern called the switch board of the brain 33 of 48 what is the thalamus thought to do, to do with memories involvement in memory retrieval 34 of 48 The brainstem links SC to brain 35 of 48 3 sections of brainstem from top-bottom mid brain, pons, medulla oblongata 36 of 48 Midbrain pupillary response, eyeball orietation 37 of 48 Pons for many unconscious activities 38 of 48 Pneumotaxil center within the pons , controls breathing rate via connection with MO 39 of 48 MO aka respiratory center. can stim muscle contraction - for inspiration 40 of 48 both MO and pons are involvent in cardiac output and hence BP 41 of 48 Cardica acceleration center increase HR, 42 of 48 cardiac slowing area decreases HR 43 of 48 vasomotor center controls b. vessel diamter 44 of 48 Spinal cord cyclinder of nervous tissue , originating in brain stem and passes thru vertebral canal 45 of 48 how many regions of Sc 5 46 of 48 Ascending signals sensory in nature - towards brain 47 of 48 descending signals motor in nature- cause a movement reposnse - commans sent by brain. 48 of 48
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