1st Joint ESMAC-GCMAS Meeting - Análise de Marcha

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Figure 1. Scoring of pathological raw EMG patterns (figures 1a – c see text) The 76 extremities were grouped according to the presence of compensations. The number of pathological clinical findings (weakness of antigravity muscles, leg length discrepancy, restrictions in RoM and in muscle lengths) within the 2 groups was compared using the chisquare test. The Spearman rank correlation was used to investigate if variables were interdependent. Results and Discussion The presence of abnormal muscle activity correlated best with muscle weakness (Spearman’s correlation p
O-47 AVERAGED EMG PROFILES IN RUNNING COMPARED TO WALKING Hof, At, Dr Ir 1,2 , Gazendam, Marnix, Drs 2 1 Laboratory of Human Movement Analysis, University Medical Center 2 University of Groningen, Center for Human Movement Sciences, Groningen, The Netherlands Summary/conclusions EMGs were collected of 14 muscles with surface electrodes in 10 subjects during walking and running. The EMGs were rectified, interpolated in 100 % of the stride, and averaged over all subjects to give an average profile. Muscles could be divided into a quadriceps, hamstrings, calf and gluteal group, with largely identical profiles within the group. Many muscles show a similar profile in running as in walking. The most notable exception is the calf group, which shows activation in early stance( 86-25%), together with quadriceps, instead of in late stance (25-55%) as in walking. Introduction In a previous paper [1] a method was presented to quantify the ‘profiles’ of averaged rectified EMGs for human walking in a range of walking speeds. It turned out that the timing of the profiles, when expressed as a fraction of the stride duration, was usually invariable, while their amplitude could vary with speed. The profiles of each muscle could be composed into a limited set of basic patterns, which they had in common within their functional group: calf, quadriceps, hamstrings and gluteal. The aim of the present paper is to make a similar analysis for running. Statement of clinical significance When EMG recordings are made in an analysis of pathology in running, these can be compared to the average profiles for healthy young people, as presented here. Methods Ten healthy male subjects (age 20.8 ± 1.2 years, mass 71.3 ± 6.3 kg, stature 1.84 ±0.07 m, leg length 0.99 ± 0.05 cm) were included. They walked and ran on a treadmill (ENRAF Entred) at speeds from 1.25 up to 2.25 m.s -1 (walking) or 4.5 m.s -1 (running). EMGs of fourteen leg muscles of the right leg were recorded. The smoothed (24 Hz) rectified EMGs were linearly interpolated to 100 points per stride, triggered by the right heel contact. Heel contact was obtained from the recording of vertical ground reaction force. At every speed an average over all subjects was obtained[1]. Results On the basis of their EMG profiles, muscles could be divided in the same functional groups as in walking. The vasti group (vastus medialis and lateralis) showed the same pattern as in walking: one peak from shortly before heel contact (80%) up to 15%. When changing from walking into running at the same speed, there is a 40% increase in amplitude, Figure 1A. At higher running speeds the amplitude increases only little. The hamstrings (biceps femoris, semimembranosus, semitendinosus) showed a pattern with two peaks in late swing and early stance, similar to walking, but some 10% earlier, Figure 1B. The amplitudes of the two peaks changed with speed quite differently for the three muscles. The muscles of the calf group (soleus, gastrocnemius medialis and lateralis, peroneus longus) had a pattern markedly different from walking. In running, activity started shortly before heel contact (86%) and ending before toe-off at 25%, Figure 1C. In walking toe-off is much later (57%) than in running (37%) and peak calf muscle activity is later as well, from 25-55%. In the gluteal group (gluteus maximus and medius) the EMG showed peaks from 88-18% and - 162 -
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O-01 KNEE EXTENSION AT TERMINAL SWI
Page 3 and 4:
O-02 THE MODIFIED TARDIEU IN STANDI
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O-03 COORDINATION BETWEEN PELVIS, T
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O-04 CAN GAIT ANALYSIS GUIDE MANAGE
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O-05 DISTAL FEMORAL EXTENTSION OSTE
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O-06 THE EFFECT OF SHOES ON GAIT IN
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O-07 CORRELATIONS BETWEEN CLINICAL
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O-08 DOUBLE CALIBRATION VS GLOBAL O
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O-09 THE SYMMETRICAL AXIS OF ROTATI
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O-10 FEASIBILITY OF A NEW -JOINT CO
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O-11 A SINGLE GAIT CYCLE AS MEASURE
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O-12 IMPROVED TRACKING OF HIP ROTAT
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O-13 PROTOCOL CHANGES CAN IMPROVE T
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O-14 ALTERNATIVE METHODS FOR MEASUR
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O-15 OVERLAY PROJECTION OF 3D GAIT
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O-16 RELATIONSHIP BETWEEN THE ANTHR
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O-17 COMPARING THE RELIABILITY OF V
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O-18 3D HIP AND PELVIC GAIT PATTERN
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O-19 RELIABILITY AND VALIDITY OF AN
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O-20 HOW ACCURATE IS THE ESTIMATION
Page 41 and 42: O-21 IMPACT OF WHEELCHAIR PROPULSIO
Page 43 and 44: O-22 TOWARDS A NEW PROTOCOL FOR MOT
Page 45 and 46: O-23 KINEMATIC ANALYSIS OF UPPER LI
Page 47 and 48: O-24 KINEMATIC UPPER LIMB ANALYSIS
Page 49 and 50: O-25 3D KINEMATICS OF UPPER EXTREMI
Page 51 and 52: O-26 CLINICALLY SIGNIFICANT SHOULDE
Page 53 and 54: O-27 OBJECTIVE IDENTIFCATION OF GAI
Page 55 and 56: - 110 - O-28 NORMALCY GAIT INDEX AN
Page 57 and 58: O-29 GILLETTE GAIT INDEX IS CONSIST
Page 59 and 60: O-30 GAITABASE: NEW APPROACH TO CLI
Page 61 and 62: O-31 A MODIFIED GAIT CLASSIFICATION
Page 63 and 64: O-32 QUANTIFICATION OF KINEMATIC ME
Page 65 and 66: O-33 EXTRINSIC AND INTRINSIC VARIAT
Page 67 and 68: O-34 PAIRED OUTCOME ASSESSMENT OF A
Page 69 and 70: O-35 ENERGY EXPENDITURE DURING OVER
Page 71 and 72: O-36 HIGH FAILURE RATES WHEN AVOIDI
Page 73 and 74: O-37 SUBJECT SPECIFIC HIP GEOMETRY
Page 75 and 76: O-38 BIOMECHANICAL AND METABOLIC PE
Page 77 and 78: O-39 BIOMECHANICS OF GAIT IN CHARCO
Page 79 and 80: O-40 SAGITTAL PLANE LOWER EXTREMITY
Page 81 and 82: O-41 AN EXPLORATION OF THE FUNCTION
Page 83 and 84: O-42 DYNAMIC SIMULATIONS OF SLOW, F
Page 85 and 86: O-43 AUTOMATIC IDENTIFICATION OF MU
Page 87 and 88: O-44 DYNAMIC MEASUREMENT OF GASTROC
Page 89 and 90: O-45 ASSESSING THE REGULATORY ACTIV
Page 91: O-46 ABNORMAL EMG-ACTIVITY IN PATHO
Page 95 and 96: O-48 TRACKING DYNAMIC FOOT PRESSURE
Page 97 and 98: O-49 THE INFLUENCE OF FOOTWEAR SOLE
Page 99 and 100: O-50 GAIT ANALYSIS IN CHILDREN TREA
Page 101 and 102: O-51 A COMPARISON OF METHODS FOR US
Page 103 and 104: O-52 BIOMECHANICAL OPTIMIZATION OF
Page 105 and 106: O-53 EFFECT OF SENSORY-THRESHOLD EL
Page 107 and 108: O-54 THE IMPACT OF SINGLE EVENT MUL
Page 109 and 110: O-55 COMPREHENSIVE GAIT ANALYSIS OU
Page 111 and 112: O-56 THE EFFECT OF INCLUDING S2 ROO
Page 113 and 114: O-57 DYNAMIC FUNCTION AFTER ANTERIO
Page 115 and 116: O-58 RECOVERY OF MUSCLE STRENGTH FO
Page 117 and 118: O-59 AUDITORY-PACED WALKING FOLLOWI
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1st Joint ESMAC-GCMAS Meeting - Análise de Marcha

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