Frontal wedging is when warm air and cold air collide at the surface, or front.
What is vertebral wedging?
Vertebral Wedging Vertebral wedging is a general term used to describe spinal bones which demonstrate an atypical shape, similar to that of a wedge.
What does wedge shaped vertebrae mean?
Wedged Vertebra aka Hemivertebra. Not all wedge shaped vertebrae are due to fracture. Many are congenital or developmental conditions which were apparent from birth or developed as part of the patient's specific spinal anatomy.
What causes vertebral wedge fractures?
Vertebral Wedging Fracture A vertebral wedge fracture is one possible causes of irregular shaped spinal bones. This type of fracture can occasionally be the result of traumatic injury in any patient, but is far more typical in elderly patients as a compression fracture.
What does frontal wedging cause?
In orographic lifting, a mountain side serves as a barrier to cause air to ramp up. In frontal wedging, a cold mass of air acts as a barrier forcing warmer air to ramp up and rise.
Where does frontal wedging happen?
Frontal wedging occurs in a cold front where the colder, denser air mass is advancing.
What is frontal uplift?
FRONTAL UPLIFT. Frontal uplift occurs when greatly contrasting air masses meet along a weather front. For instance, when warm air collides with cool air along a warm front, the warm air is forced to rise up and over the cool air. As the air gently rises over the cool air, horizontally developed stratus-type clouds form ...
What happens when cold and warm air collide?
When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses. This type of front is called a warm front.
What causes air masses to move around?
Air masses are large bodies of air that have similar temperature and humidity. These air masses are moved around the atmosphere by prevailing winds that blow in one direction. At the boundaries between air masses, weather fronts form. Weather fronts cause changes in the weather such as rain, storms and wind.
What causes weather fronts?
The answer is "moisture and differences in air pressure." A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
How does frontal lifting work?
- Frontal Lifting is when less dense warm air is forced to rise over cooler, denser air as a weather fronts move. Most common in winter. - Convection is when solar energy passes through the atmosphere and heats the surface, where the air becomes less dense than the air around it, making it rise.
Where is frontal lifting?
The forced ascent of the warmer, less dense air at and near a front, occurring whenever the relative velocities of the two air masses are such that they converge at the front.
What causes frontal precipitation?
Frontal rainfall occurs when a warm front meets a cold front. The heavier cold air sinks to the ground and the warm air rises above it. When the warm air rises, it cools. The cooler air condenses and form clouds.
What is it called when a warm and cold fronts meet?
But warm fronts and cold fronts don't simply follow one another in orderly procession. They can also merge in what's known as an occluded front, an important stage in the development of many of the great weather-making low-pressure systems known as midlatitude cyclones.
What happens when two weather fronts meet?
At an occluded front, the cold air mass from the cold front meets the cool air that was ahead of the warm front. The warm air rises as these air masses come together. Occluded fronts usually form around areas of low atmospheric pressure.
Why do cold fronts cause thunderstorms?
A cold front does the same thing with a warm air mass. The warm air is forced to rise because it is less dense than the cold air. This causes a surge of rising motion with is known to generate thunderstorms. Sometimes, these storms can be nasty!
What is a vertebral wedge?
Vertebral wedging is a general term used to describe spinal bones which demonstrate an atypical shape, similar to that of a wedge. This means that instead of being flat with the top and bottom of the vertebral body being basically parallel, the vertebra is instead lower on one side and higher on the other side, forming an asymmetrical trapezium or a triangle shape, instead of a parallel rectangle shape.
Why are my vertebrae wedge shaped?
Not all wedge shaped vertebrae are due to fracture. Many are congenital or developmental conditions which were apparent from birth or developed as part of the patient’s specific spinal anatomy. This congenital condition is also commonly called a hemivertebra, particularly when the vertebral body is truly underdeveloped and triangular in shape.
Can a wedge fracture cause spinal instability?
In other instances, bone fragments may impinge upon or compress nerve roots in the lateral recess or in the neuroforaminal space, possibly enacting a pinched nerve. Severe wedge fractures have the potential to cause spinal instability.
Is wedging a part of MRI?
In some cases, the findings are part of normal spinal arthritic processes and are minor and inconsequential. In other cases, the findings are certainly cause for concern and should be monitored closely or treated professionally. In a select few cases, the wedging is obviously a big issue and has resulted in an unstable spine which is likely to need drastic surgical intervention to resolve.
Can a wedge fracture go undiagnosed?
This type of fracture can occasionally be the result of traumatic injury in any patient, but is far more typical in elderly patients as a compression fracture. In many cases, wedge fractures in older patients are completely asymptomatic and may go undiagnosed for a long time.
Can muscular spasms cause wedged vertebrae?
Wedging can also be misdiagnosed in rare instances when muscular spasms pull vertebral levels very close together. In these instances, preliminary imaging may appear to show a wedged condition, while more advanced imaging will reveal that the actual vertebrae are normal, but the alignment is so out of normal position as to make the spinal bones appear wedged in certain locations.
frontal wedgie
When a woman's undies get trapped on one side of the folds of her quiddy-quaddy.
frontal atomic wedgie
when the front of your undies are pulled over your head. Hard for this to happen but it does.
