NS_BrainC - Nervous System BRAIN Dr.StanWilliams Life Art...

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1 Nervous System - BRAIN Dr.  Stan Williams Life Art 1994
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2 Introduction  What is the brain? - 3 pounds & 100 billion neurons Brain stem vs. Hemispheres General features of the BRAIN White matter Gray matter Ne rve  c e ll b o die s , de ndrite s , a nd  unm ye lina te d a xo ns Pro te c te d b y  meninges Ba the d in cerebrospinal fluid  ( CSF) Life Art 1994
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3 To pic s  fo r Dis c us s io n Em b ryo nic  o rig in Me ning e s S urfa c e  to po g ra phy Ve ntric le s  a nd C S F Pa rts  o f the  b ra in Te le nc e pha lo n Die nc e pha lo n Me s e nc e pha lo n Me te nc e pha lo n Mye le nc e pha lo n C e re b ro s pina l fluid Bra in c irc ula tio n
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4 Neural Tube Origin- X-sect of Embryo Ne ura l pla te Ne ura l c re s t Ne ura l g ro o ve No to c ho rd De ve lo ping  s o m ite s Ne ura l tub e
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5 Neural Tube Dorsal View Ne ura l pla te Ne ura l fo lds Ne ura l g ro o ve Ne ura l tub e S o m ite s Ec to de rm Me s o de rm Tortora 2002
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6 Ne ura l Ve s ic le  De ve lo pm e nt Ne ura l tub e   -->  prim a ry  ve s ic le s  -->  s e c o nda ry ve s ic le s Prim a ry: Pro s e nc e pha lo n   --  m e s e nc e pha lo n  --   rho m b e nc e pha lo n S e c o nda ry:  te le nc e pha lo n -  die nc e pha lo n - m e s e nc e pha lo n  - m e te nc e pha lo n – Mye le nc e pha lo n Primary Vesicles Secondary vesicles Crouch 1985
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7 Secondary Vesicle Derivatives Te le nc e pha lo n      --> c e re b rum Die nc e pha lo n       --> tha la m us , hypo tha la m us ,  e pitha la m us Me s e nc e pha lo n   --> m idb ra in Mye le nc e pha lo n  --> m e dulla  o b lo ng a ta
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8 Stages in Early Brain Development 3 we e ks 5 we e ks 7we e ks 11 we e ks No te  g ro wth o f  c e re b rum Crouch 1985
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9 Embryo at Seven Weeks He m is phe re  e nla rg e m e nt De ve lo pm e nt o f e ye s  a nd  e a rs C e pha liza tio n Fle xio n o f he a d Re duc e d fa c ia l  de ve lo pm e nt De ve lo ping  ne ura l a rc he s
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10 Me ning e s   C o ve r the  C NS Dura mater -- de ns e  fib ro us   c o nne c tive  tis s ue m e ning e a l la ye rs Dura l s inus e s - dra in b lo o d C o ntinuo us  in s pina l c o rd Dura l s he a th a nd e pidura l  s pa c e Arachnoid mater - de lic a te , ne t- like  m e m b ra ne C o nta ins  C S F -- s ub a ra c hno id  s pa c e   -- a ra c hno id villi  Pia mater -   lo o s e  fib ro us  C T, hig hly  va s c ula r -s uppo rts  ve s s e ls  tha t  no uris h b ra in
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This note was uploaded on 09/23/2011 for the course BIOL 328 taught by Professor Staff during the Spring '11 term at S.F. State.

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NS_BrainC - Nervous System BRAIN Dr.StanWilliams Life Art...

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