Long-Term Imaging of Identified Neural Populations using Microprisms in Freely Moving and Head-Fixed Animals

Rhys Burrows; Chi-Hsuan Ma; Yujiao Jennifer Sun

doi:10.3791/65387

Langzeitbildgebung identifizierter neuronaler Populationen mit Mikroprismen bei frei beweglichen ...

JoVE Journal
Neuroscience

A subscription to JoVE is required to view this content. Sign in or start your free trial.

JoVE Journal Neuroscience

Long-Term Imaging of Identified Neural Populations using Microprisms in Freely Moving and Head-Fixed Animals

Langzeitbildgebung identifizierter neuronaler Populationen mit Mikroprismen bei frei beweglichen und kopffixierten Tieren

Full Text

1,599 Views

06:25 min

January 19, 2024

DOI: 10.3791/65387-v

Rhys Burrows¹, Chi-Hsuan Ma¹, Yujiao Jennifer Sun¹

¹Institute of Ophthalmology,University College London

Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

This study investigates neural responses using an advanced imaging protocol that integrates a microprism lens with head-fixed and freely-moving conditions. The research aims to characterize sensory processing dynamics across cortical layers, enhancing our understanding of brain activity during natural behaviors compared to well-controlled experiments.

Key Study Components

Area of Science

Systems neuroscience
Neuroimaging technology
Sensory processing

Background

Advancements in imaging technology are critical for system neuroscience.
High-resolution, chronic recording techniques improve our understanding of brain function.
Shifts from anesthetized to awake or freely-moving states allow for naturalistic brain activity characterization.
The protocol addresses challenges in precise stimulation and measurements during free movement.

Purpose of Study

To compare neural activities in head-fixed and freely-moving conditions.
To study sensory information processing across cortical layers.
To facilitate understanding of sensory processing dynamics in natural contexts.

Methods Used

Utilization of a microprism lens integrated with an optical design for imaging.
Head-fixed and freely-moving animal models to observe neural population activity.
Experiments comparing responses to sensory stimuli during controlled and natural tasks.

Main Results

The protocol allows direct comparisons of brain activity in two behavioral contexts, enhancing methodological precision.
Facilitates detailed examination of neural response dynamics in relation to sensory processing.
Important insights into how brain activity varies under different experimental paradigms.

Conclusions

This study demonstrates a robust method for imaging neural responses under varied conditions.
The findings enhance our understanding of neuronal mechanisms during sensory tasks.
Implications for studying plasticity and brain function in naturalistic settings are significant.

Frequently Asked Questions

What are the advantages of using the microprism lens?

The microprism lens provides enhanced imaging capabilities, allowing for detailed measurement of neural responses in varying behavioral states.

How are head-fixed and freely-moving conditions implemented?

Animals are subjected to both controlled head-fixed setups and natural behavioral tasks, enabling comparative analysis of neural activities.

What types of data are obtained from this method?

Data includes neural response dynamics under different sensory stimuli conditions, offering insights into excitability and processing mechanisms.

How does the method adapt for different experimental paradigms?

The protocol is designed to facilitate imaging across different behavioral contexts, making adjustments for controlled versus natural tasks straightforward.

What limitations should be considered when using this imaging protocol?

Considerations include the potential for variability in animal behavior and the need for precise calibration of equipment for accurate measurements.

Can this protocol be used for other animal models?

While primarily designed for specific animal models, the technique could potentially be adapted for other species depending on behavioral and anatomical compatibility.

In Kombination mit einer Kopfplatte und einem optischen Design, das sowohl mit Einzel- als auch mit Zwei-Photonen-Mikroskopen kompatibel ist, bietet die Mikroprismenlinse einen erheblichen Vorteil bei der Messung neuronaler Reaktionen in einer vertikalen Säule unter verschiedenen Bedingungen, einschließlich gut kontrollierter Experimente in kopffesten Zuständen oder natürlicher Verhaltensaufgaben bei frei beweglichen Tieren.

Die Systemneurowissenschaften profitieren stark von Fortschritten in der Bildgebungstechnologie, insbesondere in Kombination mit molekularen und genetischen Ansätzen. Forscher verwenden zunehmend hochauflösende, chronische Aufzeichnungen und zelltypspezifisches Targeting, um die Funktion des Gehirns in feinerem Maßstab, längerer Zeit und mehr Position zu analysieren. Eine bemerkenswerte Verschiebung der experimentellen Paradigmen ist die Abkehr von der betäubten Aufnahme hin zu wachen oder sich frei bewegenden Zuständen.

Dieser Ansatz ermöglicht die Charakterisierung der Gehirnaktivität unter natürlichen Bedingungen, stellt aber auch Herausforderungen für die präzise Steuerung von Stimulation und Messungen dar. Mit diesem Protokoll können wir die gleichen neuronalen Populationen in kopffesten und frei beweglichen Tieren abbilden. Wir können ihre Aktivitäten sowohl in gut kontrollierten als auch in natürlichen Paradigmen direkt vergleichen.

View the full transcript and gain access to thousands of scientific videos