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- the science of fitting workplace conditions and job demands to the capabilities of the working population.
- goal- reducing injuries, strains, stress.
- protein helps contract and relax muscles.
- (contractility and elasticity)
- actin- contractile protein.
moves away from the midline. Outward away from the body.
moves toward the midline. Inward toward the body.
- (heel bone)
- tendon strongest and thickest of the body.
- nonelastic, dense, fibrous connective tissue.
- muscle to bone.
attaches the gastrocnemius muscle(muscle of the calf) to heel bone.
- a sheet of fibrous connective tissue that covers, supports, and separates muscle.
- flexable for movement but not elastic to accomodate swelling of enclosed tissues.
thick band of tissue that covers the bones on bottom of foot.
calcium deposit in the plantar fascia near its attachment to the calcaneus(heel) bone that can be one of the causes of plantar fascilitis.
diffrence between skeletal muscle tissue and smooth muscle tissue?
- muscle voluntary and external movement.
- smooth involuntary internal movement.
skeletal muscle tissue
- attaches to bones
- striated (dark and light)
- voluntary (conscious control)
smooth muscle tissue
- located internal walls of organs.
- moves and controls the flow of fluid thru internal organs.
- unstraited muscles.
- involuntary(ANS) muscles.
- digestive/unary system.
- aka myocardium
- forms the muscle wall of the heart.
turns the palm of the hand downward or backwards.
what is tennis elbow?
- inflammation of the tendons that joins the forarm muscles on the outside of the elbow.
- three joints: humerus, radius, ulna.
- lateral:(tennis elbow) pain on the outside of forarm.
- medial:(golfer's elbow) pain on the palm side of forarm.
- cartilage bumps.
- outside, tendons around the elbow.
what causes tennis elbow?
- Overuse/alot of movement.
- Due to specific damage to forarm.
- The (ECRB)extensor carpi radialis brevis(brief) muscle helps stabilize the wrist when the elbow is straight.
who gets tennis elbow?
- most ppl who get tennis elbow are between 30-50.
- any one with risk factors.( racquet sports, improper stroke technique, improper equipment.
symptoms of tennis elbow
- pain or burning on the outer part of the elbow.
- weak grip strength.
- EMG diagnostic test that measures the electrical activity within muscle fibers in response to nerve stimulation.
- is used to rule out nerve compressions. Many nerves travel around the elbow, and the symptoms of the nerve compressions are similar to those of tennis elbow.
greek word karpos meaning wrist.
carpal tunnel syndrome(CTS)
- tendons that pass though the carpal tunnel are chronically overused and become inflamed and swollen.
- symptom: numbness and tingling in hand.(more at night)
- spinal cord injury
- loss of sensation and voluntary movements in a muscle thru disease or injury to its nerve supply.
- cause: motor vehicles(36%) violence(28.9%) falls(21.2%)
what part of hand/wrist is not effected by carpal tunnel?
all except pinky finger and ring finger because are innervated by a different nerve.
1st degree sprain/strain
- stretching of the tissue(a sprain in ligaments,or strain in tendons) without tearing of the fibers.
- characterized by pain and mild dysfunction of teh tissue or body part and minimal to no swelling.
# of named muscles?
600-640 named muscle
spinal cord length
17-18 inches long extends from base of brain down back to waist.
- Upper Motor Neurons
- nerves that lie w/i the spinal cord.
- function: to carry the messages back and forth from the brain to the spinal nerves along the spinal tract.
- high cervical injury
- requires the individual use a power chair.
- low cervical injury
- require manual chair.
Is there a cure for SCI?
- swelling arround the spinal cord.
- 18 months of recovery.
is a series of wave like contractions of the smooth muscle in a single direction.
- gluteus medius
- antibody that fights bacteria.
- vaccine for an infection caused by a type of bacteria called Streptococcus pneumoniae
- vastus lateralis
- vastus lateralis
- Ventral lateral nucleus, a component of the thalamus (neck ) in the central nervous system.
fascia, fibrous band disease