Afferent nerves are those that transmit inward; efferent are those that transmit outward.
We find it difficult to escape the conclusion from these considerations that even basic aspects of visual perception must have a strong "efferent" aspect.
The change in response to varying efferent sympathetic tone is much slower, occurring on a time scale up to 20 seconds.
Clearly, efferent adjustment of the temporal bandpass encoded by these limited capacity fibers would improve the information that the eye could send to the brain.
These depend on, among other things, explicit efferent and afferent transmissions with respect to an emulator process.
Gonadotropinreleasing hormone, a neuropeptide of efferent projections to the teleost retina induces light-adaptive spinule formation on horizontal cell dendrites in dark-adapted preparations kept in vitro.
The parasympathetic nervous system is involved in gastrointestinal responses to stress, eating and behaviour and consists of afferent as well as efferent neurons.
Transient rhabdom shedding occurs naturally once a day at dawn following overnight circadian efferent outflow to the eye.
