title: Recognition of elementary arm movements using orientation of a tri-axial accelerometer located near the wrist.
abstract: In this paper we present a method for recognising three fundamental movements of the human arm (reach and retrieve, lift cup to mouth, rotation of the arm) by determining the orientation of a tri-axial accelerometer located near the wrist. Our objective is to detect the occurrence of such movements performed with the impaired arm of a stroke patient during normal daily activities as a means to assess their rehabilitation. The method relies on accurately mapping transitions of predefined, standard orientations of the accelerometer to corresponding elementary arm movements. To evaluate the technique, kinematic data was collected from four healthy subjects and four stroke patients as they performed a number of activities involved in a representative activity of daily living, 'making-a-cup-of-tea'. Our experimental results show that the proposed method can independently recognise all three of the elementary upper limb movements investigated with accuracies in the range 91-99% for healthy subjects and 70-85% for stroke patients.
authors.affiliation: Faculty of Physical Sciences and Engineering, University of Southampton, Hampshire, UK.
authors.forename: Dwaipayan
authors.initials: D
authors.lastname: Biswas
authors.forename: Daniele
authors.initials: D
authors.lastname: Corda
authors.forename: Giovanni
authors.initials: G
authors.lastname: Baldus
authors.forename: Andy
authors.initials: A
authors.lastname: Cranny
authors.forename: Koushik
authors.initials: K
authors.lastname: Maharatna
authors.forename: Josy
authors.initials: J
authors.lastname: Achner
authors.forename: Jasmin
authors.initials: J
authors.lastname: Klemke
authors.forename: Michael
authors.initials: M
authors.lastname: Jöbges
authors.forename: Steffen
authors.initials: S
authors.lastname: Ortmann
mesh_terms: D061725:Accelerometry / Q000295:instrumentation / Q000379:methods*; D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000465:Algorithms; D001696:Biomechanical Phenomena; D002138:Calibration; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology; D012399:Rotation; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D020521:Stroke / Q000175:diagnosis / Q000503:physiopathology; D000071939:Stroke Rehabilitation; D014953:Wrist / Q000502:physiology / Q000503:physiopathology; D055815:Young Adult