Free Field Localization
Free Field Localization - Related Videos
03:00
Recording of Local Field Potential from Both Hemispheres of the Mouse Brain
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2025
This video demonstrates in vivo recording of local field potential (LFP) from bilateral M2 areas of the mouse brain. An anesthetized mouse is secured and prepared for the procedure. To record LFPs, insert microelectrodes into the target coordinates of the bilateral M2 areas, which are responsible for complex motor movements.
08:31
Concurrent Recording of Co-localized Electroencephalography and Local Field Potential in Rodent
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Cited by 4 •
2017
This protocol describes a simple method for concurrent recording of co-localized electroencephalography (EEG) and multi-laminar local field potential in an anesthetized rat. A burr hole drilled in the skull for the insertion of a microelectrode is shown to produce negligible distortion of the EEG signal.
02:44
Recording of Local Field Potential in Mouse Hippocampal-Entorhinal Cortex Slices
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2025
The video demonstrates a procedure to record the local field potential (LFP) in mouse hippocampal-entorhinal cortex slices. Electrical stimulation is provided at the CA3 stratum radiatum of the hippocampus, which causes changes in the postsynaptic potential at the CA1 stratum pyramidale. The combined change in the membrane potential of CA1 neurons, termed the local field potential, is recorded.
04:17
Concurrent Electroencephalographic and Local Field Potential Recordings in an Anesthetized Rat
0 Views •
2025
This video demonstrates the procedure for concurrent recordings of co-localized electroencephalography (EEG) and local field potentials (LFPs) in an anesthetized rat. The process involves preparing the rat and attaching stimulating electrodes to its whisker pads. An EEG spider electrode is placed on the rat's skull for surface EEG measurements. At the same time, a multi-channel microelectrode is inserted into a specific brain region through a burr hole in the skull to record neural activity...
10:33
Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts
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Cited by 8 •
2017
In the heart, molecular events coordinate the electrical and contractile function of the organ. A set of local field fluorescence microscopy techniques presented here enables the recording of cellular variables in intact hearts. Identifying mechanisms defining the cardiac function is critical in understanding how the heart works under pathological situations.
FAQs
Interaural time differences provide timing information between the ears, while interaural level differences compare the sound’s intensity at each ear. Spectral changes caused by the outer ears add frequency-dependent information about the source. The nervous system combines these signals rather than relying on one cue, allowing behavioral localization to reflect multiple acoustic features.
Head movements can refine an initial estimate by changing the acoustic information reaching the ears and outer-ear structures. These changes give the nervous system additional evidence for resolving source position, especially when a single moment of sound provides incomplete or ambiguous cues. Behavioral studies therefore treat movement as an active part of spatial hearing, not merely an incidental response.
Adaptation to complex or changing acoustic environments can reveal whether spatial hearing remains stable when sensory conditions shift. Researchers can use localization performance to examine how the nervous system accommodates those changes and preserves useful estimates of source position. This makes the task relevant to auditory processing and neural coding, not only to immediate directional behavior.
Researchers present sounds under controlled acoustic conditions and assess the participant’s or animal’s localization response. Accuracy provides a behavioral measure of how effectively spatial cues were used to estimate source position. Comparing performance across conditions can reveal the contribution of binaural information, spectral changes, or head movements while keeping the testing environment sufficiently controlled for meaningful interpretation.
Localization results provide a behavioral window into neural coding, the way sensory information is represented and combined by the nervous system. Accuracy and changes in performance indicate how effectively auditory cues support estimates of source position, although the task measures behavior rather than directly recording neural activity. This connection helps relate spatial responses to broader auditory processing.
Because sound position can guide action, researchers can relate localization performance to orientation, approach, avoidance, and communication. The same behavioral framework applies across humans and animals, allowing studies to examine how spatial hearing supports interactions with the surrounding environment. Results can also clarify the role of auditory spatial awareness in behavior beyond simply identifying where a sound originated.