something on biology and medicine on skeletal disorders?

Question

what skeletal disorder is caused by excessive weght and pressure on human's back (spine) or shouldres?
i can't find prove to show that (it's for school debate)

sites, evidence, quotation, refrence, deep explanation are mostly welcomed -plz help!!! anyone! ican't find information to prove heavy loads on back causes health problems anywhere

your explaination is greatly appreciated thanks

plz ans the Q by this friday.
debate's on sat.

on mre point, i want the explaination to be bsed on children and teenagers thanks

it's tue that i tried to fid, maybe i'm not that skilled.
thanks for your help.

Answer 1

Hi Bluewater,

Thanks for the e-mail. Here's my answer to your question:

An example of skeletal disorder that can be caused by lifting heavy weights is herniated disc or disc prolapse (ruptured disc). As we know, the lower back bears most of the weight and stress of your body. Improper or heavy lifting can cause strain on back muscles and ligaments. Lifting something too heavy can cause a sprain, strain, or spasm in one of the muscles or ligaments in the back. If the spine becomes overly strained or compressed, a disc may rupture or bulge outward- (herniated disc or disc prolapse) Furthermore, the rupture may put pressure on one of the more than 50 nerves rooted to the spinal cord that control body movements and transmit signals from the body to the brain. When these nerve roots become compressed or irritated, back pain results. Low back pain may reflect nerve or muscle irritation or bone lesions. Most low back pain follows injury or trauma to the back. Additionally, scar tissue created when the injured back heals itself does not have the strength or flexibility of normal tissue. Buildup of scar tissue from repeated injuries eventually weakens the back and can lead to more serious injury. To name some of this serious injuries:
****Cauda equina syndrome - occurs when disc material is pushed into the spinal canal and compresses the bundle of lumbar and sacral nerve roots.
****Sciatica is a condition in which a herniated or ruptured disc presses on the sciatic nerve.
****Spinal degeneration from disc wear and tear can lead to a narrowing of the spinal canal.

Excessive weight loads put on back generally is capable of producing potential harm or injuries particularly to the back bones and muscles of every human - young and old. In children's and teenager's case, it could be even more harmful, just imagine putting too much strain on young muscles and tendons PLUS strain on growth plates. Young bones are still not fully ossified or slightly cartilaginous. That means, their bones are not yet so strong thus they are as bit fragile that can sustain injury easily. So to say, bearing heavy loads may cause detrimental effects to the youngs when their bodies are not yet ready to bear the load. According to Dr. Louis Theriot, associate clinical professor of pediatrics at the University of Southern California School of Medicine, "if growth plates are not fully developed and still cartilaginous, they could be susceptible to tremendous forces and could cause problems with ligaments or fractures.

Answer 2

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Answer 3

http://education.yahoo.com/reference/gray/72.html

http://wiki.cotch.net/index.php/Evolution_doesn't_explain_erect_human_vertebral_column

Erect posture in a teenager whose vertebral bodies and spines are not fully ossified , itself acts as a stress to bend the elastic vertebral column. More so if the back bone is subjected to undue pressure by haversackful of books or other weights.
Human vertebral column is not evolved to carry weight on the back like quadrupeds.

Answer 4

are you serious? you can't find anything that shows heavy weight bearing has ill-effects on an adolescent back? there's a multitude of problems that can occur:

herniated disk
arthitis
facet artropathy
scoliosis
vertebral compression fracture

just to name a few