Pellegrini A.,Biomechanics Laboratory |
Pellegrini A.,University of Parma |
Tonino P.,Loyola University Chicago |
Paladini P.,Biomechanics Laboratory |
And 3 more authors.
Musculoskeletal Surgery | Year: 2013
Purpose: Throwing a baseball requires a coordinated sequence of scapula and humerus movements also called scapulo-humeral rhythm (SHR). Fatigue associated with repetitive throwing can lead to scapular dyskinesia, a recognized cause of shoulder disability in pitchers and overhead athletes. We introduce a novel device, the Xbus Kit, which can objectively assess scapular biomechanics and the effect of pitching on SHR. Methods: SHR was studied using the Xbus Kit (Xsens Technologies B.V., NL). Thirteen collegiate baseball pitchers (aged 20 ± 2.6) were studied, evaluating SHR in forward elevation and abduction in three sessions: before throwing (S1), after 60 pitches (S2) and 24 h after a pitching session (S3). Results: SHR changes were found in 85 % of pitchers (11 cases), and no changes were observed in 2 cases (15 %). We were able to subdivide pitchers into four groups, based on their response to pitching. Conclusion: Repetitive movement of pitching leads to SHR changes and sometimes, incomplete restoration of normal shoulder biomechanics. © 2013 Istituto Ortopedico Rizzoli.
Costantini G.,University of Rome Tor Vergata |
Saggio G.,University of Rome Tor Vergata |
Quitadamo L.,University of Rome Tor Vergata |
Casali D.,University of Rome Tor Vergata |
And 2 more authors.
NCTA 2014 - Proceedings of the International Conference on Neural Computation Theory and Applications | Year: 2014
This work concerns a system based on EMG sensors, signal conditioning circuitry, classification algorithm based on Artificial Neural Network, and virtual avatar representation, useful to identify hand movements within a set of five. This is to potentially make any trans-radial upper-limb amputee able to drive a virtual or real limb prosthetic hand. When using six EMG sensors, the system is able to recognize with an accuracy of 88.8% the gestures performed by a subject, and replicated by an avatar. Here we focused on differences resulting with the adoption of a different number of sensors and therefore, by means of a very simple heuristic method, we compared different subsets of features, excluding the less significant sensors. We found optimal subsets of one, two, three, four and five sensors, demonstrating a decrease of the performance of only 0.8% when using five sensors, while with three sensors the accuracy can be as high as 81.7%.
Cutti A.G.,Centro Protesi Inail |
Perego P.,Polytechnic of Milan |
Fusca M.C.,Polytechnic of Milan |
Sacchetti R.,Centro Protesi Inail |
Andreoni G.,Polytechnic of Milan
Sensors (Switzerland) | Year: 2014
This study aimed to explore the application of infrared thermography in combination with ambulatory wearable monitoring of temperature and relative humidity, to assess the residual limb-to-liner interface in lower-limb prosthesis users. Five male traumatic transtibial amputees were involved, who reported no problems or discomfort while wearing the prosthesis. A thermal imaging camera was used to measure superficial thermal distribution maps of the stump. A wearable system for recording the temperature and relative humidity in up to four anatomical points was developed, tested in vitro and integrated with the measurement set. The parallel application of an infrared camera and wearable sensors provided complementary information. Four main Regions of Interest were identified on the stump (inferior patella, lateral/medial epicondyles, tibial tuberosity), with good inter-subject repeatability. An average increase of 20% in hot areas (P < 0.05) is shown after walking compared to resting conditions. The sensors inside the cuff did not provoke any discomfort during recordings and provide an inside of the thermal exchanges while walking and recording the temperature increase (a regime value is ~+1.1 ± 0.7 °C) and a more significant one (~+4.1 ± 2.3%) in humidity because of the sweat produced. This study has also begun the development of a reference data set for optimal socket/liner-stump construction. © 2014 by the authors; licensee MDPI, Basel, Switzerland.
Moscato T.A.,Centro Protesi Inail |
Orlandini D.,Centro Protesi Inail
Giornale Italiano di Medicina del Lavoro ed Ergonomia | Year: 2010
Since pre-history until modern times, the ever more refined use of the hand has been fundamental to the progress of mankind. The list of functions of this incredible part of the body would fill several pages and show its fundamental importance in all our actions; in fact, there is very little that humans do that does not involve the use of the hands. The hand offers points for unlimited dissertation and is the executive organ par excellence, carrying out directly or participating in almost all our actions; it is an organ for communication and an instrument of well-being as well as being the main site of one of the five senses: touch. On this background, attention will be focused on the importance that the hand plays in daily life and, particularly, on the difficulties inevitably faced by people who are forced to live without a hand, even if replaced by an orthopaedic prosthesis. This is the sense of occupational therapy in the context of upper limb amputees. © PI-ME, Pavia 2010.
Canzoneri E.,University of Bologna |
Marzolla M.,University of Bologna |
Amoresano A.,Centro Protesi Inail |
Verni G.,Centro Protesi Inail |
Serino A.,University of Bologna
Scientific Reports | Year: 2013
Little is known about whether and how multimodal representations of the body (BRs) and of the space around the body (Peripersonal Space, PPS) adapt to amputation and prosthesis implantation. In order to investigate this issue, we tested BR in a group of upper limb amputees by means of a tactile distance perception task and PPS by means of an audio-tactile interaction task. Subjects performed the tasks with stimulation either on the healthy limb or the stump of the amputated limb, while wearing or not wearing their prosthesis. When patients performed the tasks on the amputated limb, without the prosthesis, the perception of arm length shrank, with a concurrent shift of PPS boundaries towards the stump. Conversely, wearing the prosthesis increased the perceived length of the stump and extended the PPS boundaries so as to include the prosthetic hand, such that the prosthesis partially replaced the missing limb.