class PSD(object):
    """
    Base class for postsynaptic density mechanisms, possibly including cleft. 
    May accept either NetCon or pointer inputs from a Terminal, and directly
    modifies the membrane potential and/or ion concentrations of the 
    postsynaptic cell.    
    """

    def __init__(self, section, terminal):
        """
        Parameters
        ----------
        section : :obj:`NEURON section`
            Set the section in the postsynaptic cell that the terminal is attached to.
        
        terminal : :obj:`Synapse`
            
        
        """
        self._section = section
        self._terminal = terminal

    @property
    def section(self):
        """ The cell section this PSD is attached to.
        """
        return self._section

    @property
    def cell(self):
        """ The cell this PSD is attached to.
        """
        from ..cells import Cell

        return Cell.from_section(self.section)

    @property
    def terminal(self):
        """ The presynaptic terminal connected to this PSD.
        """
        return self._terminal