Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Relative Motion Analysis using Rotating Axes-Problem Solving

Relative Motion Analysis using Rotating Axes-Problem Solving

Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...

Depth Perception and Spatial Vision

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

Three-Dimensional Force System:Problem Solving

Three-Dimensional Force System:Problem Solving

A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...

Centroid of a Body: Problem Solving

Centroid of a Body: Problem Solving

The centroid of a body is a crucial concept in engineering and physics. Finding the centroid of a body can help determine its stability, its balance point, and even its design. In this context, consider a thin wire bent in the form of a quarter circular arc. Polar coordinates are used to calculate the centroid. The wire is first divided into small differential elements of a length equal to the radius multiplied by the differential angle.
The x-coordinates and y-coordinates of each element's...

Gestalt Principles of Perception

Gestalt Principles of Perception

Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...

Coordination Number and Geometry

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Reduction in neurons immunoreactive for calcium-binding proteins in the anteroventral thalamic nuclei of individuals with Down syndrome.

Neuroscience·2024

Same author

Electrophysiological Properties of the Medial Mammillary Bodies across the Sleep-Wake Cycle.

eNeuro·2024

Same author

Impairments in the early consolidation of spatial memories via group II mGluR agonism in the mammillary bodies.

Scientific reports·2024

Same author

Converging diencephalic and hippocampal supports for episodic memory.

Neuropsychologia·2023

Same author

Reduced mammillary body volume in individuals with a schizophrenia diagnosis: an analysis of the COBRE data set.

Schizophrenia (Heidelberg, Germany)·2023

Same author

Normative mammillary body volumes: From the neonatal period to young adult.

Neuroimage. Reports·2022

Search research articles

Related Experiment Video

Updated: Jun 1, 2026

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Published on: January 26, 2024

A role for the head-direction system in geometric learning.

Seralynne D Vann¹

¹School of Psychology, Cardiff University, 70 Park Place, Cardiff, CF10 3AT, UK. vannsd@cardiff.ac.uk

Behavioural Brain Research

|June 16, 2011

Summary

Selective lesions in the lateral mammillary body impaired rats

Area of Science:

Neuroscience
Cognitive Science
Animal Behavior

Background:

Episodic memory models suggest a role for the head-direction system.
Limited data exists on the behavioral impact of head-direction system lesions.

Purpose of the Study:

To investigate the behavioral effects of lateral mammillary body lesions.
To determine the dependency of spatial memory on the head-direction system.

Main Methods:

Rats with lateral mammillary body lesions were tested on T-maze and water-maze tasks.
Tasks involved using directional, visual allocentric, and geometric cues.
Cues were systematically removed to assess reliance on specific spatial information.

Main Results:

More Related Videos

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Published on: October 18, 2024

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

Published on: February 19, 2018

Related Experiment Videos

Last Updated: Jun 1, 2026

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Published on: January 26, 2024

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Published on: October 18, 2024

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

Published on: February 19, 2018

Lesioned rats showed impairments in T-maze alternation and geometric task acquisition.
These deficits suggest a role for the head-direction system in processing visual allocentric and geometric cues.
Impairment patterns indicate potential recruitment of other navigational systems or redundancy within the head-direction system.

Conclusions:

The head-direction system is crucial for utilizing visual allocentric and geometric spatial cues in memory.
Rats may compensate for lesions by employing alternative navigational strategies.
Findings contribute to understanding the neural basis of spatial memory and navigation.