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Brief Communication
Classical conditioning of eyelid and mystacial vibrissae responses in conscious mice

Julieta Troncoso¹, Alejandro Múnera^1,2 and José María Delgado-García^1,3

¹ División de Neurociencias, Universidad Pablo de Olavide de Sevilla, 41013-Sevilla, Spain² Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, DC, Colombia

ABSTRACT

The murine vibrissae sensorimotor system has been scrutinized as a target of motor learning through trace classical conditioning. Conditioned eyelid responses were acquired by using weak electrical whisker-pad stimulation as conditioned stimulus (CS) and strong electrical periorbital stimulation as unconditioned stimulus (US). In addition, conditioned vibrissal protraction was obtained pairing either weak electrical whisker-pad stimulation or a tone as CS, with a strong electric shock delivered in the whisker-pad as US. This finding suggests that evolutionary pressure has selected a sensorimotor system capable of constructing conditioned responses on the basis of temporal relationships of stimuli, independently of any putative functional purpose.

FOOTNOTES

Article published online ahead of print. Article and publication date are at http://www.learnmem.org/cgi/doi/10.1101/lm.81204.

Corresponding author.

³ E-mail jmdelgar{at}dex.upo.es; fax 34-954-349375.

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