Biomechanics and performance when using a standard and a vertical computer mouse

Author(s)

Quemelo, Paulo R. V. ^[1] ; Vieira, Edgar Ramos ^[2]

Affiliation

^[1] Univ Franca, Dept Phys Therapy, Franca - Brazil

^[2] Florida Int Univ, Dept Phys Therapy, Miami, FL 33199 - USA

• Document type: Journal article
• Source: ERGONOMICS; v. 56, n. 8, p. 1336-1344, AUG 1 2013.
• Web of Science Citations: 8

Abstract

Objective: to compare the biomechanics and performance while using a vertical computer mouse (VM) and a standard mouse (SM). Methods: muscle activation (electromyography), forearm movements (electrogoniometers), performance (Fitts' Law test) and satisfaction (questionnaire) of 16 subjects were evaluated. Results: there were significant differences between the VM and the SM, respectively, on motion (28 degrees vs. 42 degrees pronation, p=0.001; 5 degrees ulnar vs. 7 degrees radial deviation, p=0.016) and muscle activity (13% vs. 16% of extensor carpi activity, p=0.006; 10% vs. 13% extensor digitorum activity, p=0.001). VM user satisfaction was good (68); however, time to target was longer (4.2 vs. 3.4s, p < 0.001). Conclusions: using the VM decreased wrist pronation and lowered wrist extensor muscle activity, but additional training and familiarisation time may be required to improve user performance. Practitioner Summary: Using a vertical mouse can decrease the exposure to biomechanical risk factors for computer mouse use-related musculoskeletal disorders. Using a vertical computer mouse resulted in less wrist pronation and lower wrist extensor muscle activity. But, training and familiarisation are required. (AU)

• FAPESP's process: 11/20011-1 - Biomechanical evaluation of an ergonomic mouse prototype
• Grantee: Paulo Roberto Veiga Quemelo
• Support Opportunities: Scholarships abroad - Research