Avoid wrist and shoulder complaints with a vertical mouse Prolonged use of the mouse can lead to pain and discomfort in shoulders, forearms and hands (Chang et al., 2007; Andersen et al., 2008). A vertical mouse can partially counteract these effects and lead to greater comfort. A ‘normal’ or standard mouse causes an unfavourable hand, wrist and forearm posture. The body is put under extra strain in three ways by the use of a standard mouse.
Hand, wrist and forearm load A standard mouse causes an unfavorable hand, wrist and forearm posture. This is because the body is burdened in three ways by using a standard mouse: • Pronation: Turning the wrist in from the forearm • Wrist extension: Stretching the wrist • Ulnar and radial deviation: Bend sideways from the wrist
Pronation In the forearm one speaks of pronation when the palm is A
turned inwards from the neutral starting position. During this B
movement, the bones and attached muscles in the forearm cross each other, as shown in the picture. This often leads to a higher muscle tension. And it gives more room in the wrist joint.
Wrist extension The wrist is bent backwards due to the normal height of the mouse, this is also called wrist extension. In addition, the user has to lift the finger to click, which further increases the load in the entire wrist area.
Ulnar and radial deviation The most commonly used posture when using a standard mouse is the so-called ulnar deviation. This means that the hand is bent towards the little finger side, as illustrated below. In fact, in the lateral bend in the direction of the thumb side, the radial deviation, people have very limited flexibility. Due to this position, the wrist is little in the neutral position during the use of a normal mouse and this eventually causes overloading.
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Een ergonomisch toetsenbord voor Avoid wrist and shoulder complaints een betere werkhouding with a vertical mouse We have a large selection of vertical mice in our range. A vertical mouse is grabbed in a “hand shake” position. The ‘hand shake’ position of this vertical mouse causes your wrist to bend less sideways, making the forearm turn less inwards (Schmid et al., 2015). As a result, muscle activity in the forearm is lower than with a standard mouse (Quemelo & Vieira, 2013). Research shows that the use of a vertical mouse leads to faster recovery of arm, wrist, and hand complaints (Aarås et al., 2001).
Important features vertical mouse • When using a vertical mouse, your wrist and forearm are in a better ergonomic position; • Vertical mice work quickly and accurately; • Vertical mice have a short habituation time; • BakkerElkhuizen has a suitable vertical mouse for every hand (large or small);
Positioning of the mouse It is not only the shape and control of the mouse that influences body posture, the position of the mouse on the desk is also important. Due to the numerical part, traditional full-size keyboards are very wide, while a large part of the computer users (almost) do not use this numeric part. Due to the width of the keyboard, the mouse is not directly in front of the user’s shoulder and the working posture is not optimal. Compact keyboards, without a numerical part, actually reduce the reach distance to the mouse, reducing the strain on the shoulder and forearm. The use of a compact keyboard therefore also helps in achieving a good posture.
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Avoid wrist and shoulder complaints with a vertical mouse According to European legislation, the display may not form a single unit with the keyboard. In the case of a laptop, it screen and keyboard do form one whole. It is therefore important to use a separate keyboard and mouse. From a legislative perspective, an external mouse is therefore logical and from the user’s point of view it is even necessary to be able to work comfortably and smoothly with the laptop.
Performance effects Research shows that a separate mouse when used with a laptop leads to a clear improvement in performance (Sommerich et al., 2002). Replacing a standard mouse with an ergonomic variant, then increases comfort considerably. At the same time, however, it reduces the speed. Because although you often work healthier with an ergonomic mouse, this happens (slightly) less quickly than with a standard mouse. Scott Mackenzie of York University in Canada convincingly demonstrated the lower speed of ergonomic mice. He had test subjects perform the same type of mouse task a large number of times. The test subjects became faster and faster with the touchpad and the joystick mouse. But as the graph shows, the speed was highest for the regular mouse, followed by touchpad and joystick (MacKenzie et al., 2001).
What size Evoluent fits my hand? We often have our Evoluent mice available in two or three sizes. To know if you need a small, medium or large, just measure from the bottom of your hand to the tip of your middle finger. You can do this as follows: 1. You keep your ‘mouse hand’ stretched. 2. Using a ruler or tape measure from the tip of your middle finger to the end of the hand / beginning of the wrist.
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version.
E RG
• If your hand is larger than 19.8 cm, we recommend the Large
178 mm 198 mm
LA
Medium version.
M
• If your hand is between 17.8 cm and 19.8 cm, we recommend the
IU
for you.
178 mm <
ED M
L
AL SM
• If your hand is smaller than 17.8 cm, the Small version is perfect
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198 mm
Selection matrix
Productname Article code
PRF Mouse BNEPRF10
Handshake BNESRML BNESRMR BNESRMW BNESRMLW
Grip Mouse BNEGM BNEGMW
Evoluent Standard BNEEVSR (medium)
Evoluent 3 BNEEVR (medium)
Evoluent 4 BNEEVR4S (small) BNEEVR4 (medium) BNEEVL4 (medium)
Evoluent 4 Wireless BNEEVR4SW (small) BNEEVR4W (medium)
Evoluent 4 Right Bluetooth BNEEVR4WB BNEEVR4BB
Evoluent C BNEEVRC BNEEVRCW
Unique feauture
Design
DPI settings
Right- or lefthanded
Connection
Price
Ergonomic comfort grip with 4 buttons
The hand fits properly on the mouse
3
Right
Wireless
£ 67,95
Solid vertical mouse with 2 buttons
The mouse is suitable for people with medium and small hands
Both
Wired | Wireless
Convenient grip on buttons
A compact shape for small hands
1
3 programmable buttons
Entry-level model of the Evoluent
1
Right
Wired
£ 65,95
5 programmable buttons
Traditional colour scheme
4
Right
Wired
£ 80,95
6 programmable buttons
Proven design. The mouse is available in a left and righthanded version.
4
Both
Wired
£ 99,95
6 buttons to set to personal preferences
Distinctive colours; purple for the medium version and brown for small
4
Right
Wireless
£ 119,95
Suitable for Mac users
Timeless appearance due to the white or black color
4
Right
Bluetooth
£ 119,95
With the new laser sensor you’ll miss more accurately
Modern and luxurious appearance
Right
Wired | Wireless
Extensive software to set up the mouse
Extra grip and support for the little finger and thumb
3
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Wireless: £ 91,54 Wired: £ 39.95
Right
Wired Wireless: £ 59,95
4
Evoluent D BNEEVRDS (small) BNEEVRD (medium) BNEEVRDL (large) BNEEVRDSW (small) BNEEVRDW (medium) BNEEVRDLW (large)
Wired: £ 64,95
4
Right
Wired | Wireless
Wired: £ 99,95 Wireless: £ 119,95
Wired: £ 109,95 Wireless: £ 129,95
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