Behaviors are generated from complex interactions among networks of neurons. Single-unit ensemble recording has been used to identify multiple neurons in functioning networks. These recordings have provided insight into interactions among neurons in local and distributed circuits. Recorded units in these ensembles have been classed based on waveform type, firing pattern, and physical location. ...

Primer on physiological techniques Different recording techniques:-Intracellular recording-Extracellular recording-Imaging Intracellular recording Record inside the cell using glass (why not metal?) electrodes. $$ This technique allows the experimenter to record subthreshold responses, and to understand mechanisms behind a cell's response properties. Whole-cell recording is a modern form of int...

In this paper, we demonstrate the importance of combinations of facial expressions and their timing, in explaining a person's conversational skills in a series of brief non-romantic conversations. Video recordings of 365 fourminute conversations before and after a randomized intervention were analyzed in which facial action units (AUs) were examined over different time segments. Male subjects (...

Multiple distinct K+-selective channels may contribute to action potential repolarization and afterpotential generation in chick ciliary neurons. The channel types are difficult to distinguish by traditional voltage-clamp methods, primarily because of coactivation during depolarization. I have used the extracellular patch-clamp technique to resolve single-channel K+ currents in cultured chick c...

206 words Text body: 5617 words Figure text: 967 words References: 32 Figures: 9 Table: 1 Articles in PresS. J Neurophysiol (October 19, 2005). doi:10.1152/jn.00879.2005 Copyright © 2005 by the American Physiological Society. ABSTRACT In order to study the neurophysiology of large-scale spatial cognition, we analyzed the neuronal activity of navigating homing pigeons. This is not possible using...

Objectives: To study the correlation between anatomical parameters and EMG signals by means of simulations. Methods: A mathematical model of the electrical activity from muscle ®bres and motor units has been developed. The electrical ®elds around the muscle ®bres are simulated using a line source model. The model permits the simulation of single muscle ®bre action potentials obtained by SFEMG, ...

Response properties of neurons in the central nucleus of the inferior colliculus (ICC) were investigated after unilateral cochlear removal at various ages during infancy. Nineteen ferrets had the right cochlea surgically ablated, either in adulthood or on postnatal day (P) 5, 25, or 40, 3-18 mo before recording. Adult ablations were made on the same day as ("acute," n = 3), or 2-3 mo before ("c...

Cortical cholinergic inputs are hypothesized to mediate attentional functions. The present experiment was designed to determine the single unit activity of neurons within the medial prefrontal cortex (mPFC) of rats performing a sustained visual attention task. Demands on attentional performance were varied by the presentation of a visual distractor. The contribution of cholinergic afferents of ...