computer workstation/pointing device

8/13/2019 COMPUTER WORKSTATION/POINTING DEVICE

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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

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