Post on 03-Jun-2018
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COMPUTER WORKSTATION POINTING DEVICE
BY:Ashutosh KumarMohan PeguAshish Joshi
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Pointing devices such as a mouse now
come in many sizes, shapes, and
configurations.
Selection and placement of apointer/mouse is an important
factor in creating a safe
computer workstation
MOUSE
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Trackball
Joystick
Touchpad
Pointing Device
ALTERNATIVE OPTION
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MOUSE
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MOUSE POSTURE TYPE
DO
DONT
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MOUSE POSTURE TYPE
ELBOW POSITION
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Musculoskeletal
Disorder
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Because keyboard and mouse are used simultaneously.
Using a mouse regularly involves using the same small
muscles over and over again, and can lead todiscomfort, pain, and even Workplace MusculoskeletalDisorders (WMSDs).
It is important that all elements of the workstation(keyboard, mouse, monitor), the desk itself and workpractices (posture, pace, work breaks) are addressed.
Why has using the computer mouse
become a problem?
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If the pointer/mouse isnot near the keyboard
you may be exposed
to awkward
postures, contact stress,
or forceful hand
exertions while using the
device.
Pointer Placement : Potential Hazard
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Pain (ache, soreness) onthe top of the hand.
Pain (ache, soreness)around the wrist.
Pain (ache, soreness)along the forearm and
elbow.
Formulation of painfulnodules, and in the later
stages, ganglion cysts,around the joints and
along the tendons.
Numbness and tinglingin the thumb and index
finger.
This can cause:
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Pointer Placement : Possible Solutions
Reduce the strain on hands by reducingpointing device use.
Using keyboard functions, such as pagedown, may reduce mouse use andprovide rest for hand and arm muscles.
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Pointer Placement : Possible Solutions
Sensitivity and speed (how fast the pointer
moves on the screen when the pointing device
is moved by the hand) should feel comfortable
and be adjustable.
The pointer should be able to cover the full
screen while the wrist is maintained in a
straight, neutral posture.
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How to select the right mouse?
A battery-powered cordless mouse
Shape
Size
Buttons
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Unsatisfactory WorkstationDesign
Reaching for mouse
Monitor too low
Keyboard too high, wrists bent
Chair too high, feet should be flat on the floor oron a foot rest
Document holder too far back
No arms on the chair
Bad posture, leaning forward
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Satisfactory Workstation Design
Use head sets for frequent
phone use.Monitor at eye level.
Keep wrists straight, arms
close to body, and at a right
angle
Mouse on support next to
keyboard.Document holder near monitor.
Foot rest used if feet do not touch
the floor.
Fully adjustable computer task
chair.
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Mouse Platform
Shorter Keyboard
Ergonomically advanced and Hi-Tech Mouse
Possible Solutions
H l tf h l
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How can a mouse platform help
computer users?When there is not enough space on the desk to
position a mouse within easy reach, you can use amouse platform.
A mouse platform covers the numerical pad on the
right side of the keyboard - which is rarely used in
many office functions - and serves as a place for themouse to sit. The mouse is then closer to the
person using it.
As well, because the mouse is on a platform, you
avoid the tendency to wiggle it further and further
away, which would make you reach even further
and cause muscle strain.
H l tf h l
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However, the height of the mouse platform putsyour hand in a slightly unnatural position. To
make using it more comfortable, you can use a
forearm support.
How can a mouse platform help
computer users?
H h t k b d h l
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Computer keyboards come in many sizes. By using ashorter (35.6 cm or 14" long) keyboard instead of a
regular (45.7 cm or 18" long) one, you will have an
extra 10.2 cm or 4 inches of space at the side of the
keyboard where the mouse can be placed
How can a shorter keyboard help
computer users?
H h t k b d h l
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Advantages of a shorter keyboard:
1. The extra 10.2 cm (4 inches) gained by using a shorterkeyboard will make you have to reach sideways much less.
2. Fewer sideways movements mean you will be more
comfortable and less likely to get injured.
How can a shorter keyboard help
computer users?
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Some Ergonomic Designs
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THANK YOU