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Statistical and dimensional analysis of the neural representation of the acoustic biotope of the frog.
Johannesma P, Aertsen A.
The
field of investigation is the neural representation of acoustic stimuli
occurring in the natural environment of the frog. The point of
departure is the description of a stimulus ensemble consisting of
natural sounds: the acoustic biotope. A relation of statistical and
dimensional structure of the acoustic biotope is indicated. The animal
used in the neurophysiological experiments is the grass frog, Rana
temporaria L.; microelectrode recordings are made in the auditory
midbrain. A method is described to determine the existence of a
relation between acoustic stimulus and neural events. The form of this
relation has been investigated by first- and second-order
stimulus-event correlation. While the first one does not give
significant results, the second one leads to the spectrotemporal
receptive field of the neuron for natural stimuli. Questions are
formulated to estimate the value of this receptive field as a
functional descriptor of the neuron. Finally, an outline is sketched
for a synthetic construction of the bioacoustic space from
neuroacoustic subspaces.
PMID: 6982953 [PubMed - indexed for MEDLINE]
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