

   NNeeuurroottrraannssmmiissssiioonn iinn GGuuiinneeaa PPiigg BBrraaiinnss..

   AArrgguummeennttss::

          y: The current flowing into individual brain cells.
             The currents are measured in pico-amperes.

   SSUUMMMMAARRYY::

        The `paulsen' data frame has 346 rows and 1 columns.

        Sections were prepared from the brain of adult guinea
        pigs. Spontaneous currents that flowed into individual
        brain cells were then recorded and the peak amplitude
        of each current measured.  The aim of the experiment
        was to see if the current flow was quantal in nature
        (i.e. that it is not a single burst but instead is
        built up of many smaller bursts of current).  If the
        current was indeed quantal then it would be expected
        that the distribution of the current amplitude would be
        multimodal with modes at regular intervals.  The modes
        would be expected to decrease in magnitude for higher
        current amplitudes.

   DDAATTAA DDEESSCCRRIIPPTTIIOONN::

        This data frame contains the following column:

   SSOOUURRCCEE::

        The data were kindly made available by Dr. O. Paulsen
        from the Department of Pharmacology at the University
        of Oxford.

        Paulsen, O. and Heggelund, P. (1994) The quantal size
        at retinogeniculate synapses determined from sponta-
        neous and evoked EPSCs in guinea-pig thalamic slices.
        Journal of Physiology, 480, 505-511.

   OOTTHHEERR RREEFFEERREENNCCEESS::

        Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Meth-
        ods and Their Application. Cambridge University Press.

