Eu diria que sim, com o tempo, seus sentidos diminuiriam.
Walking Dead Wiki
The dead corpse of anyone that dies for any reason will reanimate as a
zombie, unless the brain of the individual is badly damaged or
destroyed. When a person dies, the infection they carry reactivates
critical areas of the brain that support necessary vital systems,
resulting in reanimation. Because only a portion of the brain is
reactivated, the reanimated person retains only a physical resemblance
to their former self.
Por estarem apodrecendo, estão destruindo alguns dos nervos que ajudam com os sentidos; portanto, enquanto seus sentidos seriam melhores que os nossos, a menos que evoluam e parem de apodrecer, perderão seus sentidos ou parte deles.
A zombie "lifetime" varies, though it is know that a human will likely
outlive a zombie through the course of many years/decades
Além disso, seus sentidos são baseados em muito mais que nervos.
Zombies have the ability to detect scents and differentiate between
the living and the dead, and prefer to feed on living flesh. Covering
one's self in the scent of decay can act as a camouflage. They can
also use sight to distinguish living from the dead, although they seem
to have poor eyesight as their irises fade and decay, but they make up
for it in very heightened senses of strong hearing and smell.
De acordo com a Wikipedia e alguns livros médicos são considerados dolorosos ou o modo 1 / 2 é considerado um sentido. E zumbis não podem sentir dor.
Wikia Walking Dead
Zombies feel no pain.
Portanto, enquanto não vejo evidências concretas, acho que isso é sugerido através da dedução. O cérebro deles é carne e a carne apodrece; portanto, mesmo que o corpo esteja no meio do caminho, com o tempo, o senso deve diminuir.
E se você considerar esse cânone, da wikia:
As zombies decay, however, their muscles, and consequently their
entire body, becomes slowly, but surely, weaker.
E eu diria que levaria algum tempo.
A reanimated body responds to stimuli such as light, scent, and loud
noises. Oddly, even if the head was separated from the body, as long
as the brain was intact, the head would still attempt to eat anything
within reach.
Unstimulated, zombies stand still or shuffle around rather slowly.
When in this state they are referred to as "lurkers," as they can
quickly activate and attack and kill.