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2014 ; 5
(4
): 722-41
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Neural Mechanisms and Information Processing in Recognition Systems
#MMPMID26462936
Ozaki M
; Hefetz A
Insects
2014[Oct]; 5
(4
): 722-41
PMID26462936
show ga
Nestmate recognition is a hallmark of social insects. It is based on the
match/mismatch of an identity signal carried by members of the society with that
of the perceiving individual. While the behavioral response, amicable or
aggressive, is very clear, the neural systems underlying recognition are not
fully understood. Here we contrast two alternative hypotheses for the neural
mechanisms that are responsible for the perception and information processing in
recognition. We focus on recognition via chemical signals, as the common modality
in social insects. The first, classical, hypothesis states that upon perception
of recognition cues by the sensory system the information is passed as is to the
antennal lobes and to higher brain centers where the information is deciphered
and compared to a neural template. Match or mismatch information is then
transferred to some behavior-generating centers where the appropriate response is
elicited. An alternative hypothesis, that of "pre-filter mechanism", posits that
the decision as to whether to pass on the information to the central nervous
system takes place in the peripheral sensory system. We suggest that, through
sensory adaptation, only alien signals are passed on to the brain, specifically
to an "aggressive-behavior-switching center", where the response is generated if
the signal is above a certain threshold.