Gravity-loaded Spine
Gravity-loaded Spine - Related Videos
02:26
Responses to Gravity and Touch
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2020
Gravitropism: Plant Responses to Gravity Higher plants sense gravity using statocytes, cells found near the vascular tissue in shoots, and in the root cap columella in roots. Statocytes contain starch-filled organelles called statoliths. The statoliths settle, or sediment, at the bottom of the statocyte in the direction of gravity. Statolith sedimentation triggers a signaling cascade, resulting in the asymmetrical distribution of the plant hormone auxin across root and shoot tips. This...
00:58
Center of Gravity
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2025
The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but its center...
02:49
Harvesting DRG from Rat Spine: A Procedure to Extract Dorsal Root Ganglion from the Spine of a Rat Model
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2023
In this video, we demonstrate the extraction of dorsal root ganglion or DRG from a harvested rat spine for downstream applications.
01:04
Work Done by Gravity
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2023
Gravitation is one of the four fundamental forces in nature. The force between objects on Earth and Earth itself is called gravity. Like other forces, gravity does work on an object if it displaces it toward the Earth's center. In this case, the work done by gravity is said to be positive. If an external force acts on the object against the pull of gravity and manages to lift it away from the Earth's center, work is done against gravity. In this case, the net work done is said to be negative.
05:25
Quantification of Dendritic Spines Using Confocal Microscopy Imaging
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2025
Source: Gouder, et. al. Three-dimensional Quantification of Dendritic Spines from Pyramidal Neurons Derived from Human Induced Pluripotent Stem Cells. J. Vis. Exp. (2015).This video demonstrates the imaging and analysis of dendritic spines in transduced, immunolabeled pyramidal neurons using confocal microscopy. Background noise is reduced, and dendrites are traced by estimating their diameter and length. Automated spine segmentation involves setting parameters for dendrite and spine dimensions...
FAQs
Posture changes the direction and distribution of forces passing through the vertebrae and intervertebral discs. Because axial loading is influenced by body position, an upright alignment may impose a different stress pattern than another posture. These changes require corresponding adjustments in muscle and ligament tension, making posture an important variable when assessing spinal stability and everyday mechanical function.
Muscles and ligaments help preserve alignment while the vertebrae and discs bear compressive forces. Their tension adjusts as loading conditions change, supporting stability and contributing to stress distribution across the spinal column. Examining this coordinated response helps explain how the spine maintains function under gravity and why altered mechanical conditions matter when evaluating injury or rehabilitation.
Axial loading describes force transmitted along the spine and through its vertebrae and intervertebral discs. Studying this pathway helps researchers evaluate how mechanical stress relates to vertebral fracture risk and spinal stability. It also provides a basis for examining how posture, body mass, and the supporting action of muscles and ligaments influence potential injury outcomes.
A gravity-loaded spine framework incorporates the compressive effects associated with gravity, body mass, and posture, whereas a less representative model may not reflect those everyday conditions. Including these factors can make biomechanical analyses more relevant to normal spinal function. This distinction is important when researchers interpret stability, degeneration, fracture risk, or responses to treatment.
Researchers can use models and imaging protocols designed to better represent spinal function during everyday loading. The relevant setup considers posture and the forces transmitted through vertebrae and discs, while accounting for stabilizing muscle and ligament tension. Such approaches allow investigators to examine mechanical behavior in conditions that more closely reflect the spine's functioning under gravity.
This framework supports investigation of disc degeneration, vertebral fracture risk, and spinal stability. It also helps researchers assess how the spine responds to rehabilitation or surgical interventions under mechanically relevant conditions. By connecting loading patterns with these outcomes, medical studies can better evaluate disease-related changes and whether an intervention affects spinal function or stress distribution.