Their results, outlined
in a paper published today by the Journal of Neuroscience, suggest that the activity of a remarkably small
number of
neurons — as
few as 25 —
is required to
be able to distinguish between different odors.
Ret
is not an unknown factor for the Martinsried - based neurobiologists: «We already succeeded
in demonstrating a
few years ago
in mice that
neurons without the Ret receptor die prematurely and
in greater
numbers with increasing age,» says Klein.
Scientists have known for years that the
neurons in adult rats, which
are significant but
fewer in numbers than during puberty, could
be saved with learning, but they did not know if this would
be the case for young rats that produce two to four times more
neurons than adult animals.
«
In this study, we were interested in comparing different species of carnivorans to see how the numbers of neurons in their brains relate to the size of their brains, including a few favorite species including cats and dogs, lions and brown bears,» said Associate Professor of Psychology and Biological Sciences Suzana Herculano - Houzel, who developed the method for accurately measuring the number of neurons in brain
In this study, we
were interested
in comparing different species of carnivorans to see how the numbers of neurons in their brains relate to the size of their brains, including a few favorite species including cats and dogs, lions and brown bears,» said Associate Professor of Psychology and Biological Sciences Suzana Herculano - Houzel, who developed the method for accurately measuring the number of neurons in brain
in comparing different species of carnivorans to see how the
numbers of
neurons in their brains relate to the size of their brains, including a few favorite species including cats and dogs, lions and brown bears,» said Associate Professor of Psychology and Biological Sciences Suzana Herculano - Houzel, who developed the method for accurately measuring the number of neurons in brain
in their brains relate to the size of their brains, including a
few favorite species including cats and dogs, lions and brown bears,» said Associate Professor of Psychology and Biological Sciences Suzana Herculano - Houzel, who developed the method for accurately measuring the
number of
neurons in brain
in brains.
The
number of mature
neurons (NeuN +)
was at their highest
in the 3 - NP - iPSC - 7 rats, which
were similar to the sham mice, with 3 - NP and NP - iPSC - 42 rats having significantly
fewer mature
neurons than the sham rats.