Physical Techniques in Biological Research, Volume 5

action potentials adjusted amplifier amplitude applied barrel beam bioelectric biological brain capacitance capacitor cathode cathode ray tube cells changes characteristic circuit clamp components connected constant coupling current flow deflection Delgado diameter differential differential amplifier displacement effect ejection elec electrical electrode electrolyte electrophoretic extracellular feedback film frequency response gain galvanometer glass ground impedance implantation increase input instrument interference ions Kopac limit linear magnetic measured mechanical membrane metal method micro microelectrode microinjector micromanipulator micropipette microscope mounted movement multibarrel negative nerve neurons Neurophysiol noise operating orifice oscilloscope output voltage Physiol piezoelectric pipette piston plate polarity position potential difference potentiometer power supply preamplifier produced pulse R₁ range ratio recording reduced resistance sensitivity shield shown in Fig slide solution stage stimulation strain gauge substances sweep tape technique temperature tion tissue transducer transistors usually vacuum tube variable variation volume waveform wire zero