The change in response to varying efferent sympathetic tone is much slower, occurring on a time scale up to 20 seconds.
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.
Additionally, efferent projections from the wulst to the diencephalic, mesencephalic, and pretectal structures are evident.
Afferent and efferent subcortical projections of behaviorally defined sectors of prefrontal granular cortex.
Among the five efferents that showed premotor activity, none showed vigorous discharges with saccades.
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.
Limulus photoreceptors do not contain an endogenous circadian oscillator, but rely upon efferent outflow from a central clock for circadian timing.
These circuits provide means to alter or adjust behavior via afferent and efferent connections within the prefrontal cortex.
