PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 7235913

Vacuum as a grasping force.

J R O'Reagan·D F Law·M Bresler·S I Reger
View original source ↗Export metadata ↓

Abstract

Three lifting systems for small objects were designed using vacuum as an artificial prehensile force. The first system for persons with C4-5 quadriplegia employed a vacuum pump, pneumatic tubing and a customized wrist-hand orthosis. For more severely disabled persons with C4 quadriplegia, the authors adapted this vacuum pick-up system by substituting a lightweight, tubular aluminum mouthstick in place of the orthosis as the primary grasping utensil. A 3rd variation, the suction mouthstick, lifted small objects and turned pages by using only the suction power generated by the person's own inspiratory force without additional mechanical amplification.

Explore related subjects

HandHumansQuadriplegiaSelf-Help DevicesVacuumJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, Non-P.H.S.

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

J R O'Reagan, D F Law, M Bresler, S I Reger. 1981. Vacuum as a grasping force.. https://pubmed.ncbi.nlm.nih.gov/7235913/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1996

Monitoring of task performance during functional magnetic resonance imaging of sensorimotor cortex at 1.5 T.

Functional magnetic resonance imaging (fMRI) has found widespread clinical interest. Difficulties in clinical use of the fMRI technique arise, considering the lack of knowledge about activation task performance. This accounts especially for sensorimotor activation studies, in which performance of the sensorimotor activation task is-if at all-usually rated visually by subjective or semiquantitative methods (i.e., defining categories of performance such as neurological soft signs scales). Recently, instrumental methods for the measurement and analysis of motor performance have been developed. Pronation/supination (hand rotation) movement was shown to be an easily measurable and promising motor task. We have adapted a mechanic device (pronation/supination device, PSD) to monitor motor performance during the fMRI experiment. In a feasibility study, an investigation of fMRI activation strength dependence of sensorimotor cortices and supplementary motor area upon task frequency (25, 50, and 75 cycles/min) was carried out on 10 right-handed healthy volunteers. Furthermore, the authors report the observation of stimulus-induced activation changes in the cerebellum during pronation/supination movement.

Hand↗
PubMed1996

Infantile haemangiopericytoma of the hand.

Infantile haemangiopericytomas (IHP) are rare subcutaneous tumours arising from pericytes. Clinically they are difficult to diagnose and pathologically they appear to be locally invasive, but they have a better prognosis than adult haemangiopericytomas. We report a case of IHP affecting the hand of a 7-week-old child that required urgent treatment.

Hand↗