Body Mechanics.ppt Body Mechanics.ppt ppt

عرض تقديمي حول ميكانيكا الجسم الطبيعيه والمعتاده وكيفية ضبط الجسم وطبيعة الحركة فهم طبية الجسم الاحوال العادية للحركة

1. Body MechanicsBody Mechanics
Definition :Definition :
. It is the coordinated use of body parts to produce . It is the coordinated use of body parts to produce
motion and maintain equilibrium in relation to both motion and maintain equilibrium in relation to both
internal and external forces. internal and external forces.
. It is the mechanical correlation of body with special . It is the mechanical correlation of body with special
reference to the skeletal, muscular and visceral reference to the skeletal, muscular and visceral
systems and their neurological association.systems and their neurological association.

2. Body structures required for mechanical Body structures required for mechanical
correlationcorrelation
•1 .Bones:
•The bone of the whole body- spine, head and
extremities may under go changes in shape from
use in habitual faulty mechanical positions e.g.
curved spine.
•2.Joints:
•Good body mechanics implies that joints of the
body are used in such a position in relation to
their total range of motion.

3. •3 .Muscles:
•Functions :
•1 .Produce motion.
•2 .Support and protect the joints.
•3 .Protect the contents of the cavities of the body.
•Characteristics:
•1 .Muscle contraction provides the force that makes
the movement of the body as a whole against the
force of gravity.
•2 .Muscles tend to act in group rather than single.

4. •3 .Large muscles fatigue less quickly than small
muscles.
•4 .Active movement results in the contraction of
muscles.
•5 .Muscles are always in slight contraction, this is
called muscle tone.
•6 .Changes in activity and position help to maintain
muscle tone and avoid fatigue.
•7 .Muscles must have alternate periods of rest and
activity.

5. PoturesPotures::
Is that alignment of body parts that permit good
muscle skeletal balance and functioning
promotes good physiologic function.
•Importance of good posture:
•1 .Conserve energy.
•2 .Prevent injury to patient and nurse.
•3 .Aid physiologic functioning.
•4 .Improve appearance.
•5 .Prevent deformities.

6. Laws of gravity that govern body balance:
•.Center of gravity: Is the pointer which all both mass
is centered.
• .Line of gravity: the line of gravity passes from the
center of gravity and through its base of support.
•Base of support : Is the surface of the object which
gets in contact with the ground, or the table.

7. •Principles of good body mechanics:
•1 .Stand with a wide base of support either laterally
or antroposteriorly. Bend the body at the knees
rather than at the waist for greater stability.
•2 .The amount of effort required to move a body
depends on the resistance of the body as well as
the gravitational pull.
3 .Hold the objects close to you and work as close as
possible to an object which is to the lifted or
moved. This brings the center of gravity of the body
close to the center of gravity of the object.

8. •4 .Pulling, pushing, or rolling an object requires less
effort than lifting it, lifting necessitates moving
against the force of gravity.
•5 .Use the largest and the strongest appropriate
muscles to provide energy needed to prevent strain,
injury and fatigue e.g. Back injuries.
•6 .Use the weight of the body as a force for pulling
or pushing by rocking forward or backward.
•7 .External weight added to the body become part of
the total body weight and affect the location of the
center of gravity.
•8 .Face direction of movement.