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PHGY 209 - CNS and sensory

PHGY 209 - CNS and sensory - Chapter 6(Section D skip...

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(Section D, skip autonomic nervous system) Chapter 6 CNS-sen Page 1
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Screen clipping taken: 27/10/2010, 11:49 AM Screen clipping taken: 27/10/2010, 11:51 AM Directly to the CNS Gut feeling 10-27-10 October 27, 2010 11:34 AM CNS-sen Page 2
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Screen clipping taken: 27/10/2010, 11:52 AM CNS-sen Page 3
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Screen clipping taken: 29/10/2010, 11:39 AM Screen clipping taken: 29/10/2010, 11:43 AM Know where nerves innervates ---can tell where the lesions are Face too White out, grey in = opposite of brain Hole = CSF Afferent & efferent Efferent (motor) Somatic sensors 10-29-10 October 29, 2010 11:37 AM CNS-sen Page 4
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Screen clipping taken: 29/10/2010, 11:48 AM Embryonic disc is the beginning of the nervous system Neural plate : central nervous system First things to get pressed in a concussion is the optic reflexe : . Dilation reflexe tested first CNS-sen Page 5
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Screen clipping taken: 29/10/2010, 11:49 AM Screen clipping taken: 29/10/2010, 11:51 AM Neural plate Digestive track (mesodurm (covering of CNS) CNS-sen Page 6
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Screen clipping taken: 29/10/2010, 11:51 AM Within 8 months 2 types of circulations: CSF - Blood - Screen clipping taken: 29/10/2010, 11:52 AM Lateral ventricle Third ventricle Fourth ventricle In thalamus CNS-sen Page 7
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Screen clipping taken: 29/10/2010, 11:56 AM Screen clipping taken: 29/10/2010, 11:57 AM CNS-sen Page 8
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500ml a day, our capacity is 5ml Screen clipping taken: 29/10/2010, 12:00 PM Problem with the subarachnoid space ("SURFACE"), so it just accumulate 1) Accumulation INSIDE the brain 2) Where CSF comes out Exits the CSN via the arachnoid villi: -collects CSF and puts it back to the veinous blood supply CNS-sen Page 9
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Screen clipping taken: 29/10/2010, 12:01 PM Dura mater : thick 1. Arachnoid membrane 2. Pia mater : stuck to the brain, hard to take off 3. Screen clipping taken: 29/10/2010, 12:03 PM Dura mater opens up to make the dural sinus Recieves CSF through the arachnoid villi - Connects to the veinous blood supply and returned to the heart. - CNS-sen Page 10
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Screen clipping taken: 29/10/2010, 12:05 PM Screen clipping taken: 29/10/2010, 12:05 PM 4 arteries going into the brain To the brain CNS-sen Page 11
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Screen clipping taken: 29/10/2010, 12:06 PM Circle of Willis: if one arterie is blocked, the other ones can still provide the brain with blood supply. *** Brain edema Increased intercranial pressure pushes brain out the base of the skull. Compresses the brainstem and cranial nerves that regulate the pupillary response *** Screen clipping taken: 29/10/2010, 12:12 PM (combine together) CNS-sen Page 12
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Screen clipping taken: 29/10/2010, 12:12 PM *CSF made in ventricles only. Screen clipping taken: 29/10/2010, 12:14 PM Screen clipping taken: 29/10/2010, 12:18 PM Makes exchanges with the brain fluids 1 2 Ion channels CNS-sen Page 13
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Screen clipping taken: 01/11/2010, 11:39 AM Screen clipping taken: 01/11/2010, 11:39 AM 11-01-10 November 1, 2010 11:38 AM CNS-sen Page 14
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Screen clipping taken: 01/11/2010, 11:40 AM Ex: photoreceptors are for retina CNS-sen Page 15
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Screen clipping taken: 01/11/2010, 11:48 AM Screen clipping taken: 01/11/2010, 11:50 AM Opening/closing ***bodies outside d CNS Screen clipping taken: 01/11/2010, 11:52 AM CNS-sen Page 16
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