Lymnaea are capable of learning an association between light and rotation. The conditioning paradigm to produce this association and the unconditioned escape response are the same for both Lymnaea and Hermissenda, but the underlying neural mechanisms appear to differ between the two species due to differences in the organization and function of their visuo- and vestibular-sensory systems. The RPeD11 interneuron in Lymnaea controls withdrawal behavior. We analyzed the electrophysiologic characteristics of the RPeD11 and observed an increase in cell excitability; that is, spontaneous activity of the postsynaptic potential in the RpeD11 was increased in conditioned animals after learning acquisition.
Alkon, D. L. (1987) Memory Traces in the Brain. Cambridge University Press, Cambridge, London, New York, Rochelle, Melbourne, Sydney.
Ono, M., Kawai, R., Horikoshi, T., Yasuoka, T., Sakakibara, M. (2002) Associative learning acquisition and retention depends on developmental stage in Lymnaea stagnalis. Neurobiol. Learn. Memory 78, 53–64.
Sakakibara, M., Aritaka, T., Iizuka, A., Suzuki, H., Horikoshi, T., Lukowiak, K. (2005) Electrophysiological responses to light of neurons in the eye and statocyst of Lymnaea stagnalis. J. Neurophysiol. 93, 493–507.
Sakakibara, M., Kawai, R., Kobayashi, S., Horikoshi, T. (1998) Associative learning of visual and vestibular stimuli in Lymnaea. Neurobiol. Learn. Memory 69, 1–12.
Sakakibara, M., Okuda, F., Nomura, K., Watanabe, K., Meng, H., Horikoshi, T., Lukowiak, K. (2005) Potassium currents in isolated statocyst neurons and RPeD1 in the pond snail, Lymnaea stagnalis. J. Neurophysiol. 94, 3884–3892.
Syed, N. I., Winlow, W. (1991) Coordination of locomotor and cardiorespiratory networks of Lymnaea stagnalis by a pair of identified interneurones. J. Exp. Biol. 158, 37–62.
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Suzuki, H., Horikoshi, T. & Sakakibara, M. Neurophysiological Analysis of Visuo-Vestibular Conditioning in Lymnaea stagnalis. BIOLOGIA FUTURA 59, 93–95 (2008). https://doi.org/10.1556/ABiol.59.2008.Suppl.14
- Withdrawal neuron
- RPeD11 excitability
- spontaneous EPSP
- visuo- and vestibular conditioning