Nerve Impulse - Medical Animation
Nerve Impulse - Medical Animation
Nerve Impulse - Medical Animation
Nerve Impulse - Medical Animation
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3/28/24

Nerve Impulse - Medical Animation

 

This animation may only be used in support of a single legal proceeding and for no other purpose. Read our License Agreement for details. To license this image for other purposes, click here.

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Nerve Impulse - Medical Animation
MEDICAL ANIMATION TRANSCRIPT: A typical neuron consists of a cell body, plasma membrane extensions called dendrites, an elongated fiber known as an axon, and an axon hillock, the trigger zone that releases a nerve impulse. The axon hillock maintains an excitation limit, or threshold, which determines whether or not a neuron will generate a nerve impulse. A nerve impulse is an electrical signal conducted by a neuron, causing a response in another neuron or target cell. When a neuron is at rest, its membrane is polarized because there are more positive ions outside the cell and more negative ions inside the cell, which creates a charge difference across the membrane. Active transport mechanisms called sodium-potassium pumps carry more sodium and less potassium ions across the membrane to maintain this charged difference. Even in a resting neuron, there is the potential for the charged difference to create an electrical current. This is called a resting membrane potential. When an electrical current flows through a dendrite, this is called a local membrane potential. When a dendrite detects a stimulus, a sodium channel in its plasma membrane opens and lets sodium into the neuron. This influx of positive ions reverses the charge across a particular section of the membrane in a process called depolarization. To repolarize the membrane, potassium channels open and release potassium out of the neuron. Nearby, a sodium-potassium pump transports excess sodium amount and brings potassium in, which restores the resting membrane potential. The flow of reversing charges along the dendrite's membrane produces a wavelike electrical current toward the neuron's trigger zone. If the strength of the current meets or exceeds the threshold at the trigger zone, an electrical signal called an action potential or nerve impulse will occur. In a nerve impulse, the trigger zone sends an electrical signal down the axon toward the space between neurons called a synapse or to a target cell membrane. ♪ [music] ♪

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Robert F. Donnelly
Goodman Allen & Filetti, PLLC
Richmond, VA

"Medical illustrations are essential during trial for any medical malpractice case. The people at MLA have the uncanny ability of creating medical illustrations that simplify the most complex of medical concepts and human anatomy to a lay audience. The exhibits of MLA allow experts to easily describe complex concepts and human anatomy in a manner that could not be done otherwise.

In addition, their custom illustrations show in great detail the extent of injuries suffered and the devastating effects they have had on the client's anatomy. These custom illustration can show, side by side, the body before and after a catastrophic injury. The effect of this juxtaposition is unmatched by any testimony that can be adduced at the time of trial.

Even jurors after trial have commented on the ease with which they grasp medical concepts and anatomy once the MLA exhibits were introduced and used by my experts. Even judges who have "seen it all" are thoroughly impressed by the detail and sophistication of the illustrations.

I would not want to try a case without them."

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New York, NY

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Linton & Hirshman
Cleveland, OH

"For modern audiences, it is absolutely essential to use medical demonstrative evidence to convey the severity and extent of physical injuries to a jury. Your company's high quality illustrations of our client's discectomy surgery, combined with strong expert testimony, allowed the jury to fully appreciate the significance of our client's injuries.

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Attorney at Law
Minneapolis, MN

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