Action and resting potentials of cortical neurones

Intraretinal recording with micropipette electrodes in the intact cat eye

“…Thus extracellular recordings appear to have been made only with the electrode very close to the cell membrane. Extracellular impulses were typically positive-negative in shape, and previous authors have concluded that such impulses are characteristic of recording close to the cell membrane (Li, 1955;Mountcastle et al 1957).…”

The facilitatory effect of stimulation of an unspecific thalamic nucleus on cortical sensory neuronal responses

“…In all experiments the posterior sigmoid cortex was chosen for study. The recording technique was similar to that previously described (Li, 1955). Glass microelectrodes of less than 0-5,u at the tip filled with 3M-KCI were used for the recording from the depth of the cortex.…”

Some properties of mammalian skeletal muscle fibres with particular reference to fibrillation potentials

“…The frequency of discharge remained unaltered, and there was a shift of the steady potential POTENTIALS FROM MAMMALIAN MUSCLE to negativity, indicating that the recording electrode probably had entered a muscle fibre and was recording what had previously been an extracellular diphasic potential from the other side of the surface membrane. The transformation of a diphasic spike into a monophasic one as the recording electrode impales the surface membrane has been demonstrated in cortical neurones (Li, 1955).…”