I am having problem with selecting RAM lines with a integer signal and assigning them to somewhere else, I am familiar with verilog but I am unable to do the conversions.

I have tried the conversions like std_logic_vector(X) and others like to_integer but I am not able to do what I need to do, I put the errors in comments also PIAxonSpikes and PISynapticConnect is input and SAxonCount is a integer signal. I provided the snippet please

Verilog version that works perfectly,

                PONeuronWregEn <= PIAxonSpikes[SAxonCount] & PISynaptiConnect[SAxonCount];

                if (PIAxonSpikes[SAxonCount] && PISynaptiConnect[SAxonCount])
                    PONeuronInfo <= PONeuronInfo [SAxonCount];
                else
                    POWrPotential <= 1;

VHDL I want to do but I cannot, please help me with conversion of this verilog to VHDL

    PIAxonSpikes     : in std_logic_vector(PARAMNumberofAxons - 1 downto 0);
    PISynaptiConnect : in std_logic_vector(PARAMNumberofAxons - 1 downto 0);
    --these are inputs        
   signal SAxonCount : integer range 0 to (clogb2(PARAMNumberofAxons));

          when StWaitDataCSRAM =>

          if PIAxonSpikes(SAxonCount) and PISynaptiConnect(SAxonCount) = '1' then
          --  HERE I SEE A ERROR WHICH TELLS ME INDEXED NAME IS NOT A BOOLEAN
  
            PONeuronInfo <= NeuronInformation(SAxonCount);
            -- ERROR TYPE CONVERSION DOES NOT MATCH TYPE STD_LOGIC_VECTOR
          else
            -- if not then it writes the current potential so it sends the flag 
            POWrPotential <= '1';
          end if;

        when StSpikeProc =>
          
          PONeuronWregEn <= PIAxonSpikes(SAxonCount) and (PISynaptiConnect(SAxonCount));
          -- I want to and them bitwisely but I am not sure here it works bitwisely
          PONeuronInfo   <= NeuronInformation(SAxonCount);
            -- ERROR TYPE CONVERSION DOES NOT MATCH TYPE STD_LOGIC_VECTOR

          if SAxonCount = PARAMNumberofAxons - 1 then
            StTokenController <= StIterateWrCSRAM;
          else
            StTokenController <= StSpikeProc;
          end if;