Lub thawv faib khoom yog cov cim los ntawm lawv cov kev teeb tsa loj, yooj yim kev ua haujlwm, qhov chaw muaj kev sib tshuam, thiab cov chaw muaj kev txwv tsis pub muaj. Lawv tau siv dav, ruaj khov thiab ntseeg tau, ua tau zoo heev, thiab ib puag ncig phooj ywg. Lawv ua haujlwm raws li lub chaw tswj hwm rau kev faib tawm ntawm lub zog ntawm ntau yam hauv cov kab hluav taws xob hauv lub zog. Lawv ntseeg tau txais kev txais tos ntawm cov hluav taws xob nce siab thiab faib tawm ntawm lub zog rau kev thauj khoom, thiab yog qhov tseem ceeb rau kev ua kom tau zoo nrog cov khoom siv fais zoo. Txhim kho qhov kev ntseeg siab ntawm cov thawv faib hluav taws xob yog lub hom phiaj tseem ceeb ntawm kev ua haujlwm zoo.
Cov thawv faib khoom siv rau kev faib khoom siv hluav taws xob thiab pab txhawb cov voj voog hloov. Lawv muab cov qib kev nyab xeeb ntawm kev nyab xeeb thiab intuitively discuital's cov xwm txheej conduction.