Spatial vs Temporal Summation
Lub luag haujlwm lub luag haujlwm rau kev koom ua ke ntawm excitatory postsynaptic muaj peev xwm (EPSPs) thiab inhibitory postsynaptic muaj peev xwm (IPSPs), lossis ob qho tib si hauv postsynaptic neuron yog hu ua Summation. Txij li thaum, ib tus neeg EPSP muaj qhov cuam tshuam me me ntawm lub peev xwm postsynaptic membrane, nws tsis txaus kom ncav cuag theem pib, yog li ua rau muaj peev xwm ua tsis tau. Yog li, txhawm rau kom ncav cuag qhov kev txwv, ob peb EPSPs yuav tsum tshwm sim ib qho tom qab ib zaug ntxiv lossis ob peb EPSPs tib lub sijhawm. Nyob ntawm txoj kev EPSPs tshwm sim, muaj ob hom kev suav sau, uas yog; spatial summation thiab spatial summation. Ob daim ntawv no tshwm sim ib txhij los tswj cov membrane muaj peev xwm nyob rau hauv tej yam kev mob physiological.
Spatial Summation
Spatial summation yog cov txiaj ntsig ntxiv ntawm EPSPs lossis ISPSs ib txhij los ntawm cov kab mob presynaptic sib txawv ntawm cov membrane muaj peev xwm ntawm postsynaptic neuron. Qhov no suav nrog ntau lub synapses uas ua haujlwm ib txhij. Qhov kev suav ntawm algebraic ntawm cov peev txheej los ntawm cov khoom sib txawv ntawm cov dendrites yog suav tias yog hauv qhov kev suav no. Summation ntawm EPSPs tso cai rau lub peev xwm mus txog qhov muaj peev xwm ua tau, thiab kev suav ntawm IPSPs tiv thaiv lub xovtooj ntawm kev ua tiav qhov muaj peev xwm ua tau.
Temporal Summation
Temporal summation yog cov teebmeem ntxiv ntawm ntau yam EPSPs lossis IPSPs los ntawm ib leeg presynaptic neuron ntawm daim nyias nyias muaj peev xwm ntawm postsynaptic neuron. Qhov no suav nrog ib qho synapsis uas nquag nquag nquag. Kev sib sau ua ke ib ntus tshwm sim thaum lub sijhawm lub sijhawm ntev txaus, thiab qhov zaus ntawm qhov nce hauv qhov muaj peev xwm siab txaus kom ncav cuag qhov muaj peev xwm ua tau.
Qhov txawv ntawm Spatial thiab Temporal Summation yog dab tsi?
• Spatial summation muaj ntau yam synapses, whereas temporal summation involve single synapse.
• Nyob rau hauv lub sij hawm summation, EPSPs tshwm sim sai heev ib tom qab ib zaug, nyob rau hauv spatial summation, tag nrho cov ESPSs tshwm sim nyob rau tib lub sij hawm.
• Tsis zoo li qhov spatial summation, ib ntus summation nyob ntawm lub sij hawm uas EPSPs tshwm sim, thiab qhov zaus ntawm qhov muaj peev xwm.
