Tamara Supuk1, Tadej Bajd, Gregorij Kurillo. 1. Mechanical Engineering and Naval Architecture, University of Split, Rudjera Boskovica bb, Croatia. tada@fesb.hr
Abstract
BACKGROUND: Patients with pronounced spasticity reveal difficulties in hand opening during the approaching grasping phase. The general description and assessment procedures of reach-to-grasp movement for rehabilitation purposes is still not established. There is a necessity to develop a universal methodology to describe the approaching phase in grasping which would allow clinical evaluation of movement pathologies. METHODS: In the paper, the evaluation of approaching trajectories assessed during grasping by healthy subjects is described. The experiment, undertaken by 7 healthy volunteers, consisted of grasping three different stationary objects positioned in various poses by a robot. 3D recordings of the hand and fingertip trajectories were performed. The kinematic trajectories of the hand and finger markers were analysed in order to evaluate the reach-to-grasp movement. FINDINGS: The results of the kinematic analysis suggest that the reach-to-grasp movement of a healthy subject can be divided into 3 dominant phases (hand acceleration, hand deceleration, and final closure of the fingers). INTERPRETATION: The presented evaluation method can provide relevant information on the modalities the hand preshapes and approaches toward the object in order to obtain a stable grasp. The potential use of the approach for rehabilitation purposes is discussed.
BACKGROUND:Patients with pronounced spasticity reveal difficulties in hand opening during the approaching grasping phase. The general description and assessment procedures of reach-to-grasp movement for rehabilitation purposes is still not established. There is a necessity to develop a universal methodology to describe the approaching phase in grasping which would allow clinical evaluation of movement pathologies. METHODS: In the paper, the evaluation of approaching trajectories assessed during grasping by healthy subjects is described. The experiment, undertaken by 7 healthy volunteers, consisted of grasping three different stationary objects positioned in various poses by a robot. 3D recordings of the hand and fingertip trajectories were performed. The kinematic trajectories of the hand and finger markers were analysed in order to evaluate the reach-to-grasp movement. FINDINGS: The results of the kinematic analysis suggest that the reach-to-grasp movement of a healthy subject can be divided into 3 dominant phases (hand acceleration, hand deceleration, and final closure of the fingers). INTERPRETATION: The presented evaluation method can provide relevant information on the modalities the hand preshapes and approaches toward the object in order to obtain a stable grasp. The potential use of the approach for rehabilitation purposes is discussed.
Authors: Camila L A Gomes; Roberta O Cacho; Viviane T B Nobrega; Ellen Marjorie de A Confessor; Eyshila Emanuelle M de Farias; José Leôncio F Neto; Denise S de Araújo; Ana Loyse de S Medeiros; Rodrigo L Barreto; Enio W A Cacho Journal: Biomed Eng Online Date: 2020-03-04 Impact factor: 2.819
Authors: Mandar Jog; Jack Lee; Astrid Scheschonka; Robert Chen; Farooq Ismail; Chris Boulias; Douglas Hobson; David King; Michael Althaus; Olivier Simon; Hanna Dersch; Steven Frucht; David M Simpson Journal: Toxins (Basel) Date: 2020-12-20 Impact factor: 4.546