COMPUTER-AIDED LASER OPTICAL METHOD OF ARM MICRO MOTION STUDY Russian patent published in 2011 - IPC A61B5/103 

FIELD: medicine.

SUBSTANCE: computer-aided laser optical method of arm micro motion study can be used in medicine, namely in neurology, traumatology and orthopaedics, clinical physiology, sports medicine and recreation therapy. An infrared ray generator is fixed to a person being tested on an interested part of body so that a ray length to a receiver is not less than 0.1 metres and is constant within the accuracy of 0.01 metres in a sequence of studies in the same person being tested. In fixing the ray on the receiver, the PO Cloto program measures its two-dimensional coordinates and velocity. The absence of the ray on the receiver is recorded as a 'failure'. To estimate frequency-amplitude characteristic of micro motions for the whole study period, a general rank place GRP factor is calculated with forming by an accuracy rating and a various level of numerical values making a peak rank. The accuracy rating is calculated as a percentage of a number of 'failure' values, while the numerical values obtained from the receiver are classified by two amplitude ranks - high and low. To determine a first-priority two-dimensional motion direction and type, a motion nature factor MNF is evaluated by analysing a three-dimensional diagram formatted in the PO Cloto. A spectral-time coefficient STC to evaluate duration and nature of main characteristics of motor activity: performance efficiency gain, optimum and fatigue, - is calculated by formula STC=O1-O2 - where O1 is time of a first optimum of neuromuscular apparatus performance, O2 is time of a second optimum of neuromuscular apparatus performance. A positive STC value characterises developing fatigue, while a negative value characterises performance efficiency gain, and if the coefficient either equal to 'O', tending thereto shows optimum performance of peripheral neuromuscular apparatus and nerve centres managing arm micro motions realised. Time for study is 60-600 seconds, data pickup rate when obtained from the receiver is 0.25-0.5 seconds, and a unit of ray travel beam is pixel.

EFFECT: method allows higher information value and effectiveness of arm micro motion, tremor and static limb load tolerance study.

4 dwg, 8 tbl