Quantcast
atla.doereport.comatla.doereport.comMuscle Contraction - Medical Animation
Muscle Contraction - Medical Animation



or
Search Language
Browse
Medical Illustrations
Medical Exhibits
Medical Animations
Medical Animation Titles
Medical Encyclopedia
Custom Interactive
Most Recent Uploads
Body Systems/Regions
Anatomy & Physiology
Cells & Tissues
Abdomen
Back and Spine
Foot and Ankle
Hand and Wrist
Head and Neck
Hip
Knee
Shoulder
Thorax
Medical Specialties
Anesthesiology
Cancer
Cardiology
Dentistry
Emergency Medicine
Gastroenterology
Infectious Diseases
Neurology/Neurosurgery
Nursing Home
Ob/Gyn
Orthopedics
Pathology
Pediatrics
Personal Injury
Plastic Surgery
Psychiatry
Radiology
Surgery
Urology/Nephrology
Account
Administrator Login
 
5/30/20
Muscle Contraction - 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 animation for other purposes, click here.

If animation does not play, download and install the latest free Flash Player plugin.
More Like ThisAdd To Lightbox ANM11013 Enlarge Share
Ready to Purchase?

$999.00

Order by phone: (800) 338-5954
Item #ANM11013Source #1136

Muscle Contraction - Medical Animation
MEDICAL ANIMATION TRANSCRIPT:
Skeletal muscles are voluntary, controlled consciously by the nervous system, and are made up of fascicles, which are bundles of muscle fibers surrounded by connective tissue, blood vessels, and nerves. Motor nerve axons supply one or more skeletal muscle fibers, constituting a motor unit. Inside a muscle fiber, thread-like structures called myofibrils are organized into contractile units, or sarcomeres, reflecting the striations characteristic of skeletal muscle. Each sarcomere is made up of thick and thin myofilaments, strands of proteins called myosin and actin. Myosin forms thick filaments. Actin forms thin filaments. The protruding heads of myosin filaments form cross bridges that bind to actin filaments and ATP, an energy transport molecule. Thin filaments contain a sequence of actin molecules with myosin-binding sites. At rest, actin molecules bind tropomyosin and troponin, two contractile proteins that inhibit contraction. Skeletal muscle contraction begins at the muscle fibers' plasma membrane, or sarcolemma, with invaginations called transverse or T-tubules that surround each myofibril, and open to the extracellular space. T-tubules connect to a membranous network called the sarcoplasmic reticulum that store calcium and transfer ions via voltage-gated channels into the myofibril sarcoplasm to regulate muscle contraction. In the first step of muscle contraction, called excitation, a motor nerve fires an impulse, or action potential, across the neuromuscular junction, depolarizing the sarcolemma, and generating an action potential that spreads through the sarcolemma into the T-tubules, and excites the muscle fiber. The second step is coupling, wherein the action potential depolarizes the T-tubules. Channels in the sarcoplasmic reticulum release calcium into the sarcoplasm. Along the myofilaments, troponin binds calcium and separates from tropomyosin. In the third step, called contraction, tropomyosin shifts away from actin to expose the myosin-binding sites, enabling myosin to bind to actin, resulting in the activation of ATP and the cross bridges. Released energy causes the myosin heads to rotate and pull the thin filaments inward, sliding past the thick filaments and shortening the sarcomere. The fourth step of muscle contraction is relaxation, in which calcium ions return to the sarcoplasmic reticulum and break the myosin-actin bonds. The cross bridges disengage, and the sarcomere lengthens, resulting in relaxation of the muscle and the end of the contraction. ♪ [music] ♪

YOU MAY ALSO WANT TO REVIEW THESE ITEMS:
Uterine Contractions
Uterine Contractions - exh48656c
Medical Exhibit
Add to my lightbox
Find More Like This
Muscle Contraction and Relaxation
Muscle Contraction and Relaxation - ANS00258
Medical Animation
Add to my lightbox
Find More Like This
Actin and Myosin
Actin and Myosin - 3DSC13303a
Medical Illustration
Add to my lightbox
Find More Like This
Uterine Contractions
Uterine Contractions - exh60195b
Medical Exhibit
Add to my lightbox
Find More Like This
Hyperstimulation of the Uterus and Hypertonic Uterine Contractions
Hyperstimulation of the Uterus and Hypertonic Uterine Contractions - exh60195c
Medical Exhibit
Add to my lightbox
Find More Like This
Hypertonic Uterine Contractions
Hypertonic Uterine Contractions - DW00079
Medical Illustration
Add to my lightbox
Find More Like This
What attorneys say about MLA and The Doe Report:
"Medical illustrations are essential evidence in personal injury litigation and MLA is simply the best I've found at producing high-quality illustrations. Your illustrators are not only first-class artists, but creative and responsive. Your turn around time is as good as it gets. My clients have won over $60 million in jury verdicts and I can't recall a case which did not include one of your exhibits. On behalf of those clients, thanks and keep up the great work!"

Kenneth J. Allen
Allen Law Firm
Valparaiso, IN
www.kenallenlaw.com

"It is my experience that it's much more effective to show a jury what happened than simply to tell a jury what happened. In this day and age where people are used to getting information visually, through television and other visual media, I would be at a disadvantage using only words.

I teach a Litigation Process class at the University of Baltimore Law Schooland use [Medical Legal Art's] animation in my class. Students always saythat they never really understood what happened to [to my client] until theysaw the animation.

Animations are powerful communication tools that should be used wheneverpossible to persuade juries."

Andrew G. Slutkin
Snyder Slutkin & Kopec
Baltimore, MD
"It is with great enthusiasm that I recommend Medical Legal Art. We have used their services for three years and always found their professionalism, quality of work, and timely attention to detail to exceed our expectations. We recently settled two complicated catastrophic injury cases. One medical malpractice case involving a spinal abscess settled for 3.75 million and the other involving injuries related to a motor vehicle accident settled for 6.9 million. We consider the artwork provided by MLA to have been invaluable in helping us to successfully conclude these cases.

I highly recommend MLA to anyone seeking high quality, detailed medical legal artwork."

E. Marcus Davis, Esq.
Davis Zipperman, Krischenbaum & Lotito
Atlanta, GA
www.emarcusdavis.com

"I have found that the personalized medical illustrations prepared by Medical Legal Art have been very accurate and helpful. The medical doctors, both treating physicians and expert witnesses, have commented on the accuracy and professionalism of the medical illustrations. Most importantly, your prompt service and attention upon even short notice has been tremendous. I can certainly say that the medical illustrations prepared by Medical Legal Art have assisted us in bringing cases to a successful resolution."

Paul L. Redfearn
The Redfearn Law Firm, P.C.
Kansas City, MO

Medical Legal Blog |Find a Lawyer | Hospital Marketing