habituation of reflexive and motivated behaviour in mice with deficient bk channel function
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2013
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Abstract
Habituation is considered the most basic form of learning. It describes the decrease of a behavioural response to a repeated non-threatening sensory stimulus and therefore provides an important sensory filtering mechanism. While some neuronal pathways mediating habituation are well described, underlying cellular/molecular mechanisms are not yet fully understood. In general, there is an agreement that short-term and long-term habituation are based on different mechanisms. Historically, a distinction has also been made between habituation of motivated versus reflexive behaviour. In recent studies in invertebrates the large conductance voltage- and calcium-activated potassium (BK) channel has been implicated to be a key player in habituation by regulating synaptic transmission. Here, we tested mice deficient for the pore forming α-subunit of the BK channel for short-term and long-term habituation of the acoustic startle reflex (reflexive behaviour) and of the exploratory locomotor behaviour in the open field box (motivated behaviour). Short-term habituation of startle was completely abolished in the BK knock-out mice, whereas neither long-term habituation of startle nor habituation of motivated behaviour was affected by the BK deficiency. Our results support a highly preserved mechanism for short-term habituation of startle across species that is distinct from long-term habituation mechanisms. It also supports the notion that there are different mechanisms underlying habituation of motivated behaviour versus reflexive behaviour.
| Reference Key |
etyplt2013frontiershabituation
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|---|---|
| Authors | ;Marei eTyplt;Magdalena eMirkowski;Erin eAzzopardi;Peter eRuth;Peter K.D. Pilz;Susanne eSchmid |
| Journal | drug research |
| Year | 2013 |
| DOI |
10.3389/fnint.2013.00079
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| URL | |
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