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TThhee NNeerrvvoouuss SSyysstteemm
FFuunnccttiioonnss ooff tthhee NNeerrvvoouuss SSyysstteemm 
11.. CCoonnttrrooll cceenntteerr ffoorr aallll bbooddyy aaccttiivviittiieess 
22.. RReessppoonnddss aanndd aaddaappttss ttoo cchhaannggeess tthhaatt 
ooccccuurr bbootthh iinnssiiddee aanndd oouuttssiiddee tthhee bbooddyy 
((EExx:: ppaaiinn,, tteemmppeerraattuurree,, pprreeggnnaannccyy))
CCeennttrraall NNeerrvvoouuss SSyysstteemm 
NNeeuurroonnss :: mmiiccrroossccooppiicc 
nneerrvvee cceellllss tthhaatt mmaakkee 
uupp tthhee bbrraaiinn,, ssppiinnaall 
ccoorrdd,, aanndd nneerrvveess 
-- 3300,,000000 nneeuurroonnss ccaann ffiitt 
oonn aa ppiinnhheeaadd
AAnnaattoommyy ooff aa NNeeuurroonn 
EEaacchh nneeuurroonn ccoonnttaaiinnss:: 
-- CCeellll bbooddyy wwiitthh 
nnuucclleeuuss 
-- DDeennddrriitteess :: ffiibbeerrss tthhaatt 
rreecceeiivvee mmeessssaaggeess ffrroomm 
ootthheerr nneeuurroonnss 
-- AAxxoonnss :: ffiibbeerrss tthhaatt 
sseenndd mmeessssaaggeess ttoo ootthheerr 
nneeuurroonnss
• NNeeuurroonnss ddoo NNOOTT ttoouucchh;; 
tthheerree iiss aa ggaapp bbeettwweeeenn 
tthheemm ccaalllleedd aa ssyynnaappssee 
• MMeessssaaggeess aarree sseenntt 
aaccrroossss tthhee ssyynnaappsseess bbyy 
ssppeecciiaall cchheemmiiccaallss ccaalllleedd 
nneeuurroottrraannssmmiitttteerrss
CCoommmmuunniiccaattiioonn BBeettwweeeenn 
NNeeuurroonnss 
- TThhee uussee ooff 
nneeuurroottrraannssmmiitttteerrss 
ccaauusseess aann eelleeccttrriiccaall 
ccuurrrreenntt 
TThheerree iiss eennoouugghh 
eelleeccttrriiccaall ccuurrrreenntt iinn tthhee 
bbrraaiinn ttoo ppoowweerr aa 
ffllaasshhlliigghhtt
BBrraaiinn TTeeaasseerr 
IIff yyoouu wweerree rruunnnniinngg aa rraaccee,, aanndd yyoouu ppaasssseedd 
tthhee ppeerrssoonn iinn 22nndd ppllaaccee,, wwhhaatt ppllaaccee wwoouulldd 
yyoouu bbee iinn nnooww?? 
SSeeccoonndd
TTwwoo MMaajjoorr DDiivviissiioonnss 
ooff tthhee NNeerrvvoouuss 
SSyysstteemm
CCeennttrraall NNeerrvvoouuss SSyysstteemm 
BBrraaiinn :: aa mmaassss ooff 110000 
bbiilllliioonn nneeuurroonnss llooccaatteedd 
iinnssiiddee tthhee sskkuullll 
--LLeeaarrnniinngg ooccccuurrss aass mmoorree 
aanndd ssttrroonnggeerr 
ccoonnnneeccttiioonnss aarree mmaaddee 
bbeettwweeeenn nneeuurroonnss
AAnnaattoommyy ooff tthhee BBrraaiinn 
CCeerreebbrruumm :: llaarrggeesstt ppaarrtt ooff 
hhuummaann bbrraaiinn 
-- RReessppoonnssiibbllee ffoorr:: 
-- TThhoouugghhtt 
-- LLaanngguuaaggee 
-- SSeennsseess 
-- MMeemmoorryy 
-- VVoolluunnttaarryy mmoovveemmeenntt
RReettrriieevvaall ooff aa MMeemmoorryy 
AA mmeemmoorryy iiss nnoott aa 
ssnnaappsshhoott ssttoorreedd iinn tthhee 
bbrraaiinn –– iitt mmuusstt bbee ppuutt 
ttooggeetthheerr ffrroomm 
iinnffoorrmmaattiioonn ssttoorreedd iinn 
vvaarriioouuss ppaarrttss ooff tthhee 
bbrraaiinn
AAnnaattoommyy ooff tthhee BBrraaiinn 
Cerebellum : at base of 
brain 
-Responsible for: 
- Muscle coordination 
- Balance 
- Posture
AAnnaattoommyy ooff tthhee BBrraaiinn 
BBrraaiinn SStteemm :: ccoonnnneeccttss 
bbrraaiinn ttoo ssppiinnaall ccoorrdd 
--RReessppoonnssiibbllee ffoorr:: 
-- BBrreeaatthhiinngg 
-- SSwwaalllloowwiinngg 
-- HHeeaarrttbbeeaatt 
-- BBlloooodd pprreessssuurree
CCeennttrraall NNeerrvvoouuss SSyysstteemm 
SSppiinnaall CCoorrdd :: CCoolluummnn ooff 
nneerrvveess ffrroomm bbrraaiinn ttoo 
ttaaiillbboonnee –– pprrootteecctteedd bbyy 
vveerrtteebbrraaee ooff ssppiinnee 
- RReessppoonnssiibbllee ffoorr:: 
-- CCoonndduuccttiinngg 
iimmppuullsseess bbeettwweeeenn tthhee 
bbrraaiinn aanndd tthhee rreesstt ooff 
tthhee bbooddyy 
**IImmppuullsseess mmaayy ttrraavveell aass 
ffaasstt aatt 226688 mmiilleess//hhrr
BBrraaiinn TTeeaasseerr 
A H I M N O T U V W 
Which of the letters above does not belong 
with the rest? 
N It is not a mirror-image of itself
PPeerriipphheerraall NNeerrvvoouuss SSyysstteemm 
NNeerrvveess :: vviissiibbllee bbuunnddlleess 
ooff aaxxoonnss aanndd ddeennddrriitteess 
tthhaatt eenntteenndd ffrroomm tthhee 
bbrraaiinn aanndd ssppiinnaall ccoorrdd ttoo 
aallll ootthheerr ppaarrttss ooff tthhee 
bbooddyy
--RReessppoonnssiibbiilliittiieess:: 
-- SSeennssoorryy nneerrvveess -- 
ccaarrrryy mmeessssaaggeess ffrroomm 
bbooddyy ttoo bbrraaiinn ((ppaaiinn,, 
pprreessssuurree,, tteemmppeerraattuurree)) 
-- MMoottoorr nneerrvveess –– ccaarrrryy 
mmeessssaaggeess ffrroomm bbrraaiinn 
ttoo bbooddyy ttoo rreessppoonndd
BBrraaiinn TTeeaasseerr 
TThheerree iiss aa ttoowwnn wwhheerree 55%% ooff aallll tthhee ppeeooppllee 
lliivviinngg tthheerree hhaavvee uunnlliisstteedd pphhoonnee nnuummbbeerrss.. 
IIff yyoouu sseelleecctteedd 110000 nnaammeess aatt rraannddoomm ffrroomm 
tthhee ttoowwnn’’ss pphhoonnee ddiirreeccttoorryy,, oonn aavveerraaggee,, 
hhooww mmaannyy ooff tthheessee ppeeooppllee wwoouulldd hhaavvee 
uunnlliisstteedd pphhoonnee nnuummbbeerrss?? 
00 TThheeyy wwoouulldd nnoott bbee iinn tthhee pphhoonnee bbooookk iiff 
tthheeiirr nnuummbbeerr wwaass uunnlliisstteedd

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Nervous system

  • 2. FFuunnccttiioonnss ooff tthhee NNeerrvvoouuss SSyysstteemm 11.. CCoonnttrrooll cceenntteerr ffoorr aallll bbooddyy aaccttiivviittiieess 22.. RReessppoonnddss aanndd aaddaappttss ttoo cchhaannggeess tthhaatt ooccccuurr bbootthh iinnssiiddee aanndd oouuttssiiddee tthhee bbooddyy ((EExx:: ppaaiinn,, tteemmppeerraattuurree,, pprreeggnnaannccyy))
  • 3. CCeennttrraall NNeerrvvoouuss SSyysstteemm NNeeuurroonnss :: mmiiccrroossccooppiicc nneerrvvee cceellllss tthhaatt mmaakkee uupp tthhee bbrraaiinn,, ssppiinnaall ccoorrdd,, aanndd nneerrvveess -- 3300,,000000 nneeuurroonnss ccaann ffiitt oonn aa ppiinnhheeaadd
  • 4. AAnnaattoommyy ooff aa NNeeuurroonn EEaacchh nneeuurroonn ccoonnttaaiinnss:: -- CCeellll bbooddyy wwiitthh nnuucclleeuuss -- DDeennddrriitteess :: ffiibbeerrss tthhaatt rreecceeiivvee mmeessssaaggeess ffrroomm ootthheerr nneeuurroonnss -- AAxxoonnss :: ffiibbeerrss tthhaatt sseenndd mmeessssaaggeess ttoo ootthheerr nneeuurroonnss
  • 5. • NNeeuurroonnss ddoo NNOOTT ttoouucchh;; tthheerree iiss aa ggaapp bbeettwweeeenn tthheemm ccaalllleedd aa ssyynnaappssee • MMeessssaaggeess aarree sseenntt aaccrroossss tthhee ssyynnaappsseess bbyy ssppeecciiaall cchheemmiiccaallss ccaalllleedd nneeuurroottrraannssmmiitttteerrss
  • 6. CCoommmmuunniiccaattiioonn BBeettwweeeenn NNeeuurroonnss - TThhee uussee ooff nneeuurroottrraannssmmiitttteerrss ccaauusseess aann eelleeccttrriiccaall ccuurrrreenntt TThheerree iiss eennoouugghh eelleeccttrriiccaall ccuurrrreenntt iinn tthhee bbrraaiinn ttoo ppoowweerr aa ffllaasshhlliigghhtt
  • 7. BBrraaiinn TTeeaasseerr IIff yyoouu wweerree rruunnnniinngg aa rraaccee,, aanndd yyoouu ppaasssseedd tthhee ppeerrssoonn iinn 22nndd ppllaaccee,, wwhhaatt ppllaaccee wwoouulldd yyoouu bbee iinn nnooww?? SSeeccoonndd
  • 8. TTwwoo MMaajjoorr DDiivviissiioonnss ooff tthhee NNeerrvvoouuss SSyysstteemm
  • 9. CCeennttrraall NNeerrvvoouuss SSyysstteemm BBrraaiinn :: aa mmaassss ooff 110000 bbiilllliioonn nneeuurroonnss llooccaatteedd iinnssiiddee tthhee sskkuullll --LLeeaarrnniinngg ooccccuurrss aass mmoorree aanndd ssttrroonnggeerr ccoonnnneeccttiioonnss aarree mmaaddee bbeettwweeeenn nneeuurroonnss
  • 10. AAnnaattoommyy ooff tthhee BBrraaiinn CCeerreebbrruumm :: llaarrggeesstt ppaarrtt ooff hhuummaann bbrraaiinn -- RReessppoonnssiibbllee ffoorr:: -- TThhoouugghhtt -- LLaanngguuaaggee -- SSeennsseess -- MMeemmoorryy -- VVoolluunnttaarryy mmoovveemmeenntt
  • 11. RReettrriieevvaall ooff aa MMeemmoorryy AA mmeemmoorryy iiss nnoott aa ssnnaappsshhoott ssttoorreedd iinn tthhee bbrraaiinn –– iitt mmuusstt bbee ppuutt ttooggeetthheerr ffrroomm iinnffoorrmmaattiioonn ssttoorreedd iinn vvaarriioouuss ppaarrttss ooff tthhee bbrraaiinn
  • 12. AAnnaattoommyy ooff tthhee BBrraaiinn Cerebellum : at base of brain -Responsible for: - Muscle coordination - Balance - Posture
  • 13. AAnnaattoommyy ooff tthhee BBrraaiinn BBrraaiinn SStteemm :: ccoonnnneeccttss bbrraaiinn ttoo ssppiinnaall ccoorrdd --RReessppoonnssiibbllee ffoorr:: -- BBrreeaatthhiinngg -- SSwwaalllloowwiinngg -- HHeeaarrttbbeeaatt -- BBlloooodd pprreessssuurree
  • 14. CCeennttrraall NNeerrvvoouuss SSyysstteemm SSppiinnaall CCoorrdd :: CCoolluummnn ooff nneerrvveess ffrroomm bbrraaiinn ttoo ttaaiillbboonnee –– pprrootteecctteedd bbyy vveerrtteebbrraaee ooff ssppiinnee - RReessppoonnssiibbllee ffoorr:: -- CCoonndduuccttiinngg iimmppuullsseess bbeettwweeeenn tthhee bbrraaiinn aanndd tthhee rreesstt ooff tthhee bbooddyy **IImmppuullsseess mmaayy ttrraavveell aass ffaasstt aatt 226688 mmiilleess//hhrr
  • 15. BBrraaiinn TTeeaasseerr A H I M N O T U V W Which of the letters above does not belong with the rest? N It is not a mirror-image of itself
  • 16. PPeerriipphheerraall NNeerrvvoouuss SSyysstteemm NNeerrvveess :: vviissiibbllee bbuunnddlleess ooff aaxxoonnss aanndd ddeennddrriitteess tthhaatt eenntteenndd ffrroomm tthhee bbrraaiinn aanndd ssppiinnaall ccoorrdd ttoo aallll ootthheerr ppaarrttss ooff tthhee bbooddyy
  • 17. --RReessppoonnssiibbiilliittiieess:: -- SSeennssoorryy nneerrvveess -- ccaarrrryy mmeessssaaggeess ffrroomm bbooddyy ttoo bbrraaiinn ((ppaaiinn,, pprreessssuurree,, tteemmppeerraattuurree)) -- MMoottoorr nneerrvveess –– ccaarrrryy mmeessssaaggeess ffrroomm bbrraaiinn ttoo bbooddyy ttoo rreessppoonndd
  • 18. BBrraaiinn TTeeaasseerr TThheerree iiss aa ttoowwnn wwhheerree 55%% ooff aallll tthhee ppeeooppllee lliivviinngg tthheerree hhaavvee uunnlliisstteedd pphhoonnee nnuummbbeerrss.. IIff yyoouu sseelleecctteedd 110000 nnaammeess aatt rraannddoomm ffrroomm tthhee ttoowwnn’’ss pphhoonnee ddiirreeccttoorryy,, oonn aavveerraaggee,, hhooww mmaannyy ooff tthheessee ppeeooppllee wwoouulldd hhaavvee uunnlliisstteedd pphhoonnee nnuummbbeerrss?? 00 TThheeyy wwoouulldd nnoott bbee iinn tthhee pphhoonnee bbooookk iiff tthheeiirr nnuummbbeerr wwaass uunnlliisstteedd