Lecture notes and notes from book (Fundamentals of Human Ne..
Lecture notes and notes from book (Fundamentals of Human Neuropsychology)

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School
University of Toronto Mississauga
Department
Psychology
Course
PSY318H5
Professor
Melissa Holmes
Semester
Winter

Description
Organisationof theNervous System(contd) January-14-10 1:06PM Layers,Nuclei,Nerves,andTracts { LayersorNuclei { Well-definedgroupofcellbodies { Eachnucleuslayerhasaparticularfunction { Inlayers-presentedaslayers Differenceinstainingcancomefromsizeofcells,howdenselypackedtheyareinthe layers { Innuclei-standaloneasan islandamongthetissue { Tract { Akafiberpathway { LargecollectionofaxonsprojectingtoorawayfromalayerornucleuswithintheCNS { Examples:CorticospinalTract,OpticTract { WithinCNS;distinctfromnerves { Nerves { FibersandfiberpathwaysthatenterandleavetheCNS { Intheperiphery { AfterenteringtheCNS,arecalledtracts { Examples:AuditoryNerve,VagusNerve TheOriginand DevelopmentoftheCentralNervous System { Slide27 { Threeregionsofdevelopingbrain Prosencephalon(frontbrain) Olfaction Developsfurthertoformtelencephalonanddiencephalon-includesthalamus Mesencephalon(middlebrain) Visionandhearing Rhombencephalon(hindbrain) Movementandbalance Spinalcordconsideredpartofhindbrain Furtherdevelopsintometencephalon(includesenlargedcerebellum)and myelencephalon { Forebrain,midbrainandhindbraindevelopintoadulthood Slide28 { Ventricles { HollowpocketswithinthebrainfilledwithCSF comefromhollowneuraltube { Numbered1-4 Lateralventricles(firstandsecond) ThirdandFourthventriclesextendintothebrainstemandspinalcord Thespinalcord { Receivesfibersfromafferentsensoryreceptors { Sendsefferentfiberstocontrolmuscles { 30spinalcordsegmentsdividedintofourregions Cervical(8) Thoracic(12) Lumbar(5) Sacral(5) { Segments(dermatomes)encirclespinalcolumn Slide30 { DorsalRoot:afferentfiberscarryingsensoryinformationtothebrain { VentralRoot:efferentfiberscarryingmotorinformationtothebody { Spinalvertebraearereversed:graymatteroninside(cellbodiesarehere)whitematteronthe www.notesolution.com
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