Gravity Impactor
Gravity Impactor - Related Videos
03:24
Generating a Mouse Model of Traumatic Brain Injury Using an Impactor Device
0 Views •
2025
This video demonstrates the procedure for inducing traumatic brain injury (TBI) in a mouse model. An anesthetized mouse with an exposed skull is taken to create an opening in the skull, and then a controlled cortical injury is induced using an impact device. The injury damages the brain tissue, causing impaired cognitive function and motor coordination.
03:58
Generating a Traumatic Brain Injury Mouse Model Using an Impactor Probe
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2025
This video demonstrates the procedure for inducing an open-skull traumatic brain injury in a mouse by making a midline skull incision, drilling through the skull and removing the bone flap to expose the brain cortex, and applying high pressure to induce trauma. The wound is then sutured to prepare the mouse model for subsequent experiments.
07:28
A Contusive Model of Unilateral Cervical Spinal Cord Injury Using the Infinite Horizon Impactor
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Cited by 46 •
2012
A reliable and repeatable way to produce a cervical unilateral spinal cord injury using the Infinite Horizon impactor is described. The method takes advantage of a custom designed frame and clamp to stabilize the spine. The standardized procedure and biomechanical injury parameters result in sufficient and sustained injuries.
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...
FAQs
The main control variables are the weighted object’s mass, release height, impact velocity, and contact location. Together, they determine how mechanical energy is delivered to the selected target and help researchers produce injuries with defined experimental conditions. Controlling these factors is essential when comparing injury severity, biological responses, or treatment outcomes across experimental groups.
Kinetic energy describes the mechanical energy transferred when the falling mass contacts the target. In a Gravity Impactor model, researchers regulate that transfer through measurable features such as mass, drop height, and impact velocity. This provides a practical link between the physical impact and later observations of neuronal dysfunction, inflammation, tissue damage, or behavior.
Contact location determines which defined target receives the mechanical blow, making it a central part of experimental standardization. Keeping the location consistent helps researchers distinguish effects caused by the intended impact from differences caused by placement. It also supports meaningful comparisons of biomechanical damage, neural dysfunction, inflammatory responses, and behavioral outcomes between experimental conditions.
Standardized impacts make the physical insult more reproducible from one experiment or study to another. When mass, height, velocity, and contact location are controlled, researchers can compare resulting injury patterns and biological responses with greater confidence. This consistency is especially valuable for evaluating possible treatments, protective strategies, and mechanisms responsible for acute or longer-term consequences of brain trauma.
A basic setup requires selecting a weighted object, measuring its release height, identifying the target and contact location, and controlling the impact conditions. Researchers then deliver the blow under those defined parameters and assess the resulting response. Recording the mass, height, velocity, and location allows the experiment to be interpreted and reproduced across groups or studies.
Following a controlled impact, researchers can examine several levels of outcome, including biomechanical damage, neuronal dysfunction, inflammation, and behavior. These measurements connect the initial mechanical event with acute and longer-term consequences of brain trauma. Using multiple outcome types can help reveal how physical injury relates to altered neural function and observable behavioral changes.
In neuroscience, this approach is useful when investigators need an experimental model of traumatic brain injury with controlled and reproducible mechanical conditions. It supports studies of injury mechanisms, acute and longer-term consequences, potential treatments, and protective strategies. Because the impact parameters can be standardized, results can be compared across experimental groups and across studies.