Abstract：
:In order to explore the role of active whisking in object novelty detection, the performance of rats having bilateral vibrissal paralysis was compared to that of non-lesioned animals in three modified versions of the one-trial object recognition task performed in the dark. Vibrissal paralysis was induced by crushing the buccal and mandibular branches of the facial nerve. Lesioned animals were not different from non-lesioned ones in terms of weight-gain, locomotive activity, motivation to explore, and ability to become habituated to a given environment. Only lesioned animals were unable to discriminate a change in object texture as novelty cue in the first task, designed to test textural novelty detection. In the second task, designed to test positional novelty detection, both lesioned and non-lesioned subjects were able to discriminate a change in object position as novelty cue. In the third task, designed to force the subjects to choose between two conflicting novelty cues (texture and position), non-lesioned subjects displayed a clear-cut preference for textural novelty while subjects having bilateral vibrissal paralysis preferred positional novelty. According to these results, active whisking is necessary for textural, but not for positional novelty detection. Moreover, these results indicate that textural novelty in non-lesioned animals seems to overcome positional novelty if these are in competition in an object recognition memory task.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Moreno C,Vivas O,Lamprea NP,Lamprea MR,Múnera A,Troncoso Jdoi
10.1016/j.bbr.2010.03.044subject
Has Abstractpub_date
2010-08-25 00:00:00pages
229-35issue
2eissn
0166-4328issn
1872-7549pii
S0166-4328(10)00230-5journal_volume
211pub_type
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