Brain Measurement Techniques
Brain Measurement Techniques - Related Videos
09:31
Noninvasive Blood Pressure Measurement Techniques
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2023
Source: Hamna J. Qureshi and Craig J. Goergen, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana Here we will highlight the key similarities and differences of noninvasive blood pressure measurement techniques between humans and rodents and examine the engineering principles that govern blood pressure. The principles that govern current cuff technology to acquire systolic and diastolic pressures will also be discussed. Commercially available cuffs that connect...
03:54
Zebrafish Brain Dissection: A Technique of Fish Neurobiology
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2023
This video describes the technique of microdissection of the brain from an adult zebrafish. This method helps in obtaining whole brain derived neuorospheres that can be studied further.
02:51
Measuring the Viscoelastic Properties of Mouse Brain Tissue Using Rheometry
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2025
Source: Canovic, E. P., et al. Characterizing Multiscale Mechanical Properties of Brain Tissue Using Atomic Force Microscopy, Impact Indentation, and Rheometry. J. Vis. Exp. (2016)In this video, a rheometer was used to apply controlled oscillatory rotational motion to brain tissue to generate shear strain and evaluate the tissue's viscous and elastic properties. The rheometer, as a functional tool, it provides insights into brain mechanics during injury or neurodegenerative diseases.
09:17
Measuring Grey Matter Differences with Voxel-based Morphometry: The Musical Brain
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California Experience shapes the brain. It is well understood that our brains are different as a result of learning. While many experience-related changes manifest themselves at the microscopic level, for example by neurochemical adjustments in the behavior of individual neurons, we may also examine anatomical changes to the structure of the brain at a macroscopic level. One famous example of this kind of change...
03:15
Measuring the Infarct Zone and Brain Edema in a Rat Brain Following Middle Cerebral Artery Occlusion
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2025
This video demonstrates the assessment of the infarct zone and brain edema in brain slices from rats subjected to middle cerebral artery occlusion. Infarcted areas are identified using redox staining, while a blue filter and threshold function in image analysis software quantify the infarct zone and edema in the affected hemisphere.
FAQs
Interpretation depends on matching the detected signal to the biological feature under study. Electrical activity can indicate neural activity, whereas blood-flow changes, magnetic fields, or tissue features provide different views of brain function or structure. This distinction matters because a single measurement does not represent every brain property; comparing modalities can connect neural processes with biological outcomes.
EEG measures electrical activity, MRI can characterize brain structure, and functional imaging can detect changes associated with brain activity, including blood-flow changes. These techniques therefore address different biological questions rather than serving as interchangeable measurements. Researchers select among them according to whether they need information about tissue features, neural activity, or physiological responses.
Comparing measurements across experimental conditions helps distinguish changes associated with a behavior, disease state, developmental stage, or treatment response. Instead of examining one measurement in isolation, researchers evaluate how brain activity, connectivity, structure, or physiological responses differ between conditions. Those differences can reveal relationships between neural processes and observable biological outcomes.
Connectivity provides a way to examine relationships among brain regions or circuits rather than focusing only on an individual signal or tissue feature. Evaluating connectivity alongside activity or structure can help researchers relate coordinated brain processes to behavior, development, disease, or treatment responses. This broader view supports investigations of how brain circuits function and where abnormalities may occur.
A basic workflow starts by identifying whether the study targets structure, activity, connectivity, or a physiological response. Researchers then select a technique that detects a relevant signal, collect measurements under defined experimental conditions, and compare the resulting patterns across conditions. The final comparison can reveal relationships between neural processes, behavior, abnormalities, or treatment responses.
These techniques are used when researchers need to relate brain properties to behavior, development, disease, or responses to experimental treatments. Measurements can help identify abnormal patterns, examine how neural circuits function, and evaluate changes associated with an intervention. Their applications extend across neuroscience, diagnostic research, and efforts to develop or assess therapeutic approaches.