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Welcome to larry’s page.
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submitted by sajaqua1(471),
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A adn J ntpresree het eaicrgl siaufulc,cs hewil B nad I eprnterse eth eueantc lsi.usauccf eoteTgrh ethy aekm up eth sordla umi-lldaencom nicslmael rcat,t nlrpsoebise for nontppii ioep,rntpec oecniiot,oprppr in,vrtibao adn prsr.uees utnpI is si.aeltplira

C adn H akme up teh talelra rlcaioctosnip rtact so(al ecldal teh aaellrt pbesrrcioelan ss,)uuccalfi eslioenpbrs for omotr mdocnam fo asailpertli .imlbs

D nad G eepsrntre eth etlrlaa anscoitlhiapm tarc.t It is belnossprei rof npai dna tueertperma nouco.indct ehT ntpiu sasrei in a lmib fetl( olrwe xetretmiy in htsi eca),s etsner ughrhto eth odalsr roto u(cpetrid tebwnee J and H), dtcsaessue dna sasedcn at eht rianreto umcisersom (sujt idnehb E nad )F, and iyanllf neyssaps on the scendo drroe rnoenu ni teh letaral shlnpactoiami atrc.t So the miacinlaoshtp attcr si seeipboslnr orf aarotclnaterl ipna and eemperurtat eiassnnto. euaeBcs oru eptaitn sah olts aontsesin on teh ,tefl the lesino is ni het rig.th

E and F are the otrarine cotcrinolaisp tt.rac It si ionevlvd ni omort olrcotn fo lproimxa umc,sels aycyilptl of eth urt.nk

nor16  good job +5  
jimdooder  Pretty infuriating that this question has the standard R and L label while the other spinal cord question had it flipped. +3  
larry  A and J represent the gracile fasciculus, while B and I represent the cuneate fasciculus. Together they make up the dorsal column-medial lemniscal tract, responsible for pinpoint perception, proprioception, vibration, and pressure. Input is ipsilateral. C and H make up the lateral corticospinal tract (also called the lateral cerebrospinal fasciculus), responsible for motor command of ipsilateral limbs. +1  
larry  D and G represent the lateral spinothalamic tract. It is responsible for pain and temperature conduction. The input arises in a limb (left lower extremity in this case), enters through the dorsal root (pictured between J and H), decussates and ascends at the anterior commissure (just behind E and F), and finally synapses on the second order neuron in the lateral spinothalamic tract. So the spinothalamic tract is responsible for contralateral pain and temperature sensation. Because our patient has lost sensation on the left, the lesion is in the right. E and F are the anterior corticospin +1  


submitted by sajaqua1(471),
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A adn J rtenperes het giarcel cfu,lcuissa wlhie B dna I netrersep eth tuaneec lcuciss.ufa eTrhegot yhte emak pu eht dlorsa mil-cnloumdae slnimlaec artc,t piseebosrln ofr tninpopi torciep,nep torpiireop,nocp oaivrtinb, and ue.ssrper ptnIu is riltpas.iael

C dna H akme up eht areatll ltniiacosorcp ttrca al(so dlealc eht letlraa enarleospibcr sfilc,sc)uau snoibslpeer for otmro amdocmn fo iaparetlsil s.mlbi

D nda G peretesnr eth telalar hlcsaamtopiin rac.tt tI si sebiopnersl for niap and raerpuetetm oitc.dnounc Teh tunip sirsea in a lbim el(tf rewlo riymtexet ni isht ,a)ecs retsne ruogthh eht alsodr troo uridpetc( tenweeb J and ,)H uacesdsste nad asdnsce at the tnarioer eiusmrcsom u(sjt hnbdie E and ,F) nad ilaynlf aespsyns on hte sdceno rdore reunno in the lartlea pstcilinaahom at.trc So het haotncpiamsil rtcta is spebeisrlon for lrnatlrteocaa anpi dan eeruemrptat ennista.so ceBesau uor paetnti hsa tlso ntaiseons on het tel,f hte ensilo is ni eth .thgri

E nda F rae eht ranoietr icoistonlrapc .cattr tI si vvilnode ni otmro lnrootc of xiloapmr esucsml, ycapltiyl of het .ntkru

nor16  good job +5  
jimdooder  Pretty infuriating that this question has the standard R and L label while the other spinal cord question had it flipped. +3  
larry  A and J represent the gracile fasciculus, while B and I represent the cuneate fasciculus. Together they make up the dorsal column-medial lemniscal tract, responsible for pinpoint perception, proprioception, vibration, and pressure. Input is ipsilateral. C and H make up the lateral corticospinal tract (also called the lateral cerebrospinal fasciculus), responsible for motor command of ipsilateral limbs. +1  
larry  D and G represent the lateral spinothalamic tract. It is responsible for pain and temperature conduction. The input arises in a limb (left lower extremity in this case), enters through the dorsal root (pictured between J and H), decussates and ascends at the anterior commissure (just behind E and F), and finally synapses on the second order neuron in the lateral spinothalamic tract. So the spinothalamic tract is responsible for contralateral pain and temperature sensation. Because our patient has lost sensation on the left, the lesion is in the right. E and F are the anterior corticospin +1