Receptive Field Mapping
Receptive Field Mapping - Related Videos
06:02
Topographical Estimation of Visual Population Receptive Fields by fMRI
0 Views •
Cited by 3 •
2015
It is important to obtain unbiased estimates of visual population receptive fields (pRFs) by functional magnetic resonance imaging. We use mild regularization constraints to estimate pRF topography without a-priori assumptions about pRF shape, allowing us to choose specific pRF models post-hoc. This is particularly advantageous in subjects with visual-pathway lesions.
11:53
Intracellular Recording, Sensory Field Mapping, and Culturing Identified Neurons in the Leech, Hirudo medicinalis
0 Views •
Cited by 14 •
2013
This article describes three nervous system preparations using leeches: intracellular recording from neurons in ventral ganglia, culturing neurons from ventral ganglia, and recording from a patch of innervated skin to map sensory fields.
09:48
Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
0 Views •
Cited by 8 •
2016
We demonstrate use of a fiber optic distributed sensor for mapping the temperature field of mixing air jets. The Rayleigh scattering-based sensor generates thousands of data points along a single fiber to provide exceptional spatial resolution that is unattainable with traditional sensors such as thermocouples.
06:58
Fate Mapping
0 Views •
2023
Fate mapping is a technique used to understand how embryonic cells divide, differentiate, and migrate during development. In classic fate mapping experiments, cells in different areas of an embryo are labeled with a chemical dye and then tracked to determine which tissues or structures they form. Technological improvements now allow for individual cells to be marked and traced throughout embryonic development and adulthood. This video reviews the concepts behind fate mapping, and then details a...
11:03
Motor Maps
0 Views •
2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California One principle of brain organization is the topographic mapping of information. Especially in sensory and motor cortices, adjacent regions of the brain tend to represent information from adjacent parts of the body, resulting in maps of the body expressed on the surface of the brain. The primary sensory and motor maps in the brain surround a prominent sulcus known as the central sulcus. The cortex...
FAQs
A map shows more than whether a neuron responds: it links response magnitude and timing to stimulus location and features. This reveals tuning, meaning the sensory conditions that preferentially influence activity, and helps indicate how sensory information is arranged across circuits and brain areas. Comparing these patterns can expose functional differences among neural populations.
Response strength indicates how strongly a stimulus influences neural activity, whereas response timing shows when that influence occurs. Considering both measures gives a richer description of sensory processing than either measure alone. Their relationship to stimulus location and features helps researchers characterize how neural populations encode sensory information across different parts of a sensory system.
The map depends on systematically varying where a stimulus occurs and which sensory features it contains. A neuron may show different response strengths or timing across those controlled conditions, revealing the portions of sensory space and stimulus properties linked to its activity. This organization provides a functional view of how sensory signals are represented in neural circuits.
Researchers first select controlled stimuli suited to the sensory system under study, such as visual, auditory, or somatosensory inputs. They present those stimuli systematically while recording activity from a neuron or neural population. The recorded response strength and timing are then related to stimulus location and features to construct and interpret the map.
Receptive Field Mapping can examine visual, auditory, and somatosensory processing when researchers present controlled stimuli from the relevant modality. The same general logic applies across these systems: activity is recorded while stimulus locations and features are varied, allowing response patterns to be related to the organization of sensory information in the studied neural population.
The technique helps researchers characterize functional architecture and compare neural responses across development or different conditions. Its results can connect cellular activity with broader questions about perception, sensory coding, and behavior. By relating measured activity to stimulus location and features, investigators can examine how sensory information is organized across circuits and brain areas.