The effects of“lifting height (2 cm, 6 cm, and 10 cm) ”and“lifting velocity (natural and fast) ”, and influence of reaching action on timing and manipulative forces of the precision grip were examined while lifting a test object. Five adult males volunteered as subjects for the study. Grip forces, load force (the vertical lifting force) and vertical position of the test object were measured and time derivatives of them were computed using laboratory software. It was found that lifting height and velocity exerted significant interaction effects in movement time of the object during lifting phase (T3), peak load force (PLF) and peak velocity (PVel) . Significant main effects of height and velocity were as follows. The higher the lifting height (2 cm, 6 cm, 10 cm) was, the longer T 3 as well as larger PGF, PLF, PdGF/dt, and PVeI were. For the fast velocity trials, T 2 and T 3 were shorter, and PGF, PLF, PdGF/dt, PdLF/dt, and PVeI were larger than the natural velocity condition. The influence of the lifting velocity was stronger in the height of 6, 10 cm than in the height of 2 cm. For all trials with different heights and different velocity, the force rate profiles (dGF/dt and dLF/dt) were continuous, bell-shaped and single-peaked during the loading phase. There was a parallel increase of grip force in relation to an increase of load force. To reveal the height effect further, the target height was unexpectedly changed in some trials at the moment of finger contact with the grip surface. It was found that both timing and force actions were similar to the initial target height condition followed by an apparent correction of gripping and lifting actions to reach the secondary target height.
Results of this study suggest that both lifting height and velocity were important factors to determine the force actions when manipulating an object. Both grip force and load force seem to be well-programmed according to intended height and velocity conditions.
When the lifting action was made following the reaching action, T 3 became shorter, PGF became less, and PVeI became longer than those without the reaching action. The reaching action thus seems to facilitate the force coordination during the lifting action.

A study was conducted to investigate the effects of object weight on the regulation of grip force during holding tasks using a precision grip. In addition, variations in grip force among individuals were examined. Using a force transducer-equipped grip apparatus, grip force, load force and the vertical position of the object were measured continuously while using load weights of 0.98N, 1.96N, and 2.94N under sandpaper grip surface conditions. From the recorded data, peak grip force, average static grip force, slip force, safety margin force (average static grip force-slip force), and time to stabilize the grip force from the peak grip force were evaluated.
It was found that both the slip force and safety margin force increased with object weight. The static friction coefficient, estimated from the slip force and load force, deviated from Amonton's law at a lower load force. The deviation was believed to be due to the influence of the viscoelastic nature of finger skin. An increase in safety margin force with object weight was considered to be related to the psychological reaction to the increased heaviness of the object. Indeed, in trials that included unexpected changes in object weight, the safety margin force was increased, which also seemed to be associated with the psychological reaction to uncertainty about the object's weight. A relatively large inter-subject variation was revealed for both the slip force and safety margin force.

In kampo medicine, an illness is considered to affect the entire body, even if the symptoms appear only in the abdomen. Abdominal palpation is considered an important diagnostic physical examination in kampo medicine. Because learning the kampo style of abdominal palpation is difficult, we attempted to simplify the process by developing typical models of 6 important kampo abdominal diagnoses (shinka-hiko, kyokyo-kuman, fukuchokukin-renkyu, shofuku-fujin, shofuku-koman, and shinkabu-shinsuion).1) When we discussed abdominal palpation in lectures on kampo medicine for clinicians we also assessed the opinions and impressions of participants about the abdominal palpation simulators. 2) We administered an anonymous questionnaire survey about interest in kampo medicine, the understanding of abdominal palpation in the kampo style, and an evaluation of the abdominal palpation simulators. We obtained 149 replies from participants of the 11 lectures. 3) Of the participating physicians, 85.2% were interested in kampo medicine. However, 23.5% of physicians were not familiar with abdominal palpation in the kampo style. 4) Furthermore, 58.4% of physicians thought that kampo-style abdominal palpation was explained well or very well in the lecture with the abdominal palpation simulators. The abdominal palpation simulators were judged to be useful or very useful by 72.2% of the physicians. 5) In conclusion, the abdominal palpation simulators were considered to be useful for learning abdominal palpation in the kampo style, even though these simulators have some shortcomings. These models may be useful for simplifying the learning of abdominal palpation by students of kampo medicine.

In Kampo medicine, sickness is regarded as affecting the whole body even though the symptoms may appear obvious only in the abdomen. This makes abdominal palpation an important means of physical examination, and diagnosis. Because learning abdominal palpation in the Kampo style is very difficult, we attempted to simplify learning by building typical anatomical abdomen models for training. To create six abdominal models : Shinka-hiko, Kyokyo-kuman, Fukuchokukin-renkyu, Shofuku-fujin, Shofuku-koman, and Shinkabu-sinsuion, we employed several materials, including artificial leather for epidermal tissue, pile fabric for subcutaneous tissue, cotton cloth or jersey cloth for membrane tissue, polyurethane or natural rubber for muscle tissue, specialized polyester resin for costae, and cotton for internal organs. We employed a harder polyurethane, for example, in Shinka-hiko to simulate resistance in the region beneath the heart, in Kyokyo-kuman to simulate resistance in the subcostal region, and in Shofuku-koman to simulate horseshoe-shaped resistance in the lower abdominal region. Otherwise, in Shofuku-fujin, a lack of resistance was simulated by a defect in the polyurethane at the center of the lower abdominal region. Shinkabu-sinsuion was modeled using a water dabbling sound via a water-filled balloon that could be gently shaken with the fist in the region above the navel. Fukuchokukin-renkyu was modeled as excessive strain of the rectus abdominis muscles via the use of natural rubber. We tried to represent the tenderness on pressure at the para-umbilical region, cecal region, and sigmoid region in the Shofuku-koman model by making a specialized switch with conducting rubber, and using electric device and battery. We believe these models are useful teaching devices, in that they simplify Kampo abdominal palpitation training.
Medicine, Kampo ; Cancer resistance to treatment ; Training ; Tissues ; Palpation

By means of indirect sphygmomanometer called “volume compensation technique” systolic and diastolic blood pressure in finger arteries were noninvasively and continuously measured during and after the “doshi” which is the acupuncture of the carotid sinus. After 15-min resting, 2-min puncture of the right and left carotid sinus was carried out in 23 healthy subjects (8 males and 15 females, aged 18-55). Finger arterial blood pressure was measured during the rest and the in-situ puncture, and then at 30 minutes after the withdrawing. For the control the dodged puncture of the carotid sinus was also made in other 6 healthy subjects (2 males and 4 females, aged 23-55).
Decreasing in blood pressure were observed during and after the doshi in 87% of the subjects. The mean magnitude of the decrease in the systolic and diastolic pressure at 15-21 minutes after the withdrawal of the needle were 12 and 10mmHg, respectively. Pulse pressure and heart rate showed little changes during the experiment. To the control dodged puncture, the maximum change in the systolic and diastolic pressure were 3.4 and 5.0mmHg, respectively, which were within the range of the physiological blood pressure variation. These data suggests that the blood pressure response to the “doshi” may not be induced by the vagal cardiac inhibition but by the change in peripheral vascular resistance.

During and after the “Toshi” which is the acupuncture of the carotid sinus, systolic and diastolic blood pressure were measured in the basal pharanx of finger arteries by means of indirect sphygmomanometer called the “volume compensation method”. After 15 minutes resting, 2 minutes acupuncture on both sides of the carotid sinus was carried out in 16 hypertensive subjects. Finger arterial pressure showed a significant decrease by about 14mmHg (mean) in systolic pressure and by 9mmHg (mean) in diastolic pressure during and after the acupuncture (p<0.05). The decrease in blood pressure showed a maximum at 15-20 minutes after the withdrawal of needles. Pulse pressure and heart rate did not show a significant change. These results were almost similar to those obtained in normotensive subjects. These data suggests that hypertensive subjects are also responsible to “Toshi” and that this effect may not be caused by the cardiac inhibition refrex but the change in vascular tonus.

The electromyographic (EMG) activities of the back and thigh muscles while pedaling a bicycle ergometer at different load levels (300, 450, 600 and 750 kpm/min) and during walking and running at top speed up and down a staircase were investigated in children classified as physically less and more active than average. Each child underwent a battery of physical fitness tests to determine his physical fitness level relative to the national standard. Although the physiques of the inactive and active children did not differ, there were considerable differences between their back-lift, grip and knee-extension strengths, and the maximum anaerobic power, and 50-m dash performances of the two groups. The EMG data for each of the different tasks over selected periods (bicycle pedaling: 5 complete revolutions, staircase task: 5 stepping cycles) under different workload conditions were full-wave rectified and integrated (IEMG) . Under low workload conditions (ergometer tasks at 300 and 450 kpm/min and walking up and down stairs), the mean IEMG values (mIEMG) of all the muscles tested did not differ significantly in the inactive and active children. However, for all the higher workload tasks (pedaling at 600 kpm/min and running up and down stairs), the mIEMG values of the erector spinae muscles in the inactive children were significantly lower than those of the active children, and the difference increased gradually as the workload increased. This trend was even more marked when normalized mIEMG values were used. When the children ran up and down stairs at top speed, the inactive group had lower thigh, gluteus maximus and erector spinae muscle mIEMG values than the active group, and the difference between the normalized mIEMGs of the erector spinae muscles of the two groups showed a particularly strong statistical significance (P<0.01) when running both up and down stairs. As a similar trend was observed when the workload was maintained at a high level for the bicycle pedaling task, we concluded that at least part of the difference between the muscular activities of the two groups of children demonstrated when they carried out the running task was attributable to differences in the development of the muscle fibers and neuronal mechanisms of the erector spinae muscles.

The effects of the surface friction of a grasped object on the regulation of grip force during holding tasks using a precision grip were investigated. Using a force transducer-equipped grip apparatus, the grip force and load force acting on the object were measured continuously while surface materials (silk, wood, suede and sandpaper) and load weights (0.98N, 1.96N, 2.94N, 4.90N and 9.81N) were varied. From the recorded data, the average static grip force, slip force, safety margin force and static friction coefficient were evaluated.
It was found that both the slip force and safety margin force increased as the slipperiness of the object surface increased. Significant interactions between surface type and weight were observed in the slip force and static friction coefficient. The interaction effect resulted from the fact that the frictional relationships with the fingers changed according to both weight and surface conditions. This was considered due to the viscoelastic nature of finger skin. An increase in the safety margin force with surface slipperiness was considered due to psychological reaction, probably fear of dropping the object. Unexpected changes in surface conditions caused a greater safety margin force than trials without a surface change, which might also have been associated with psychological reaction to uncertainty of the new surface condition. A relatively large inter-subject variation was found in the slip force and safety margin force relative to slippery surfaces.

During and after the LI4 and LI10 Acupuncture, the volume elastic modulus Ev in the basal phalanx of finger arteries were measured. Ev values were noninvasively obtained using a new type of plethysmograph called the “electric impedance-cuff” which can detect indirect arterial pressure and volume change in the artery. After 15 minutes of rest, 2 minutes acupuncture on LI4 and LI10 were carried out in 16 healthy subjects, respectively. Volume elastic modulus showed a significant decrease (p<0.01) during and after the LI10 Acupuncture. Its decrease were maintained at least 20 minutes after the withdrawal of the needle. While the Ev values did not show the typical change during and after the LI4 acupuncture. These date suggest that the elasticity of the peripheral wall was lagely affected by the LI10 acupuncture, and the effect was caused not only by peripheral reflex but by other factors.