• Perspectives in Nursing Science
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• 제2권1호
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• pp.19-36
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• 2005

Muscle atrophy is defined as a decrease in muscle mass, cross-sectional area, and myofibrillar protein content. Causes inducing muscle atrophy may be inactivity, denervation, undernutrition and steroid. Inactivity may decrease protein synthesis and increase protein breakdown of skeletal muscle. The muscle atrophy due to inactivity was induced by bed rest, hindlimb suspension, cast, total hip replacement arthroplasty, anterior cruciate ligament reconstruction. Denervated atrophy may be induced by the loss of innervation from lower motor neuron. The atrophy was apparent in the lower limb of hemiplegic patients following ischemic stroke and in the hindlimb of ischemic stroke rats. Protein breakdown of skeletal muscle in the undernourished state results in muscle atrophy. The atrophy due to undernutrition was evident in cancer and leukemia patients and in the undernourished rats. Steroids have been used to treat allergies, inflammatory diseases, autoimmune diseases and to inhibit immune function following transplantation. Steroids may induce muscle atrophy by protein breakdown of skeletal muscle. Muscle Physiology Laboratoryat College of Nursing, Seoul National University proved that dexamethasone may induce hindlimb muscle atrophy in rats and exercise and DHEA may attenuate hindlimb muscle atrophy induced by the steroid in rats. Nurses working with patients undergoing steroid treatment need to be cognizant of steroid induced muscle atrophy. They need to assess whether muscle atrophy is being occurred during and after the steroid treatment. Moreover, they need to apply exercise and DHEA to the patients undergoing steroid treatment in order to attenuate the steroid induced muscle atrophy.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.691-698
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• 2009

본 연구의 목적은 현수 기간 중 적용한 신경근 전기자극의 사전 적용이 흰쥐 뒷다리 근육의 무게와 후지 기능에 미치는 효과를 알아보는데 있다. 이를 위해서 25마리의 Sprague-Dawley계 흰쥐를 14일 동안 현수한 HLS군(n=5)과 14일 동안 자유롭게 사육한 WB군(n=5), 현수 기간 중 14일간 사전 전기자극을 실시한 ES14군(n=5), 현수 기간 중 11일간 사전 전기자극한 ES11군(n=5), 현수 기간 중 7일간 사전 전기자극한 ES7군(n=5)에 무작위 배치하여 실험을 진행하였다. 실험결과, HLS군과 ES7군에서 비복근의 근무게, 후지 활보장의 유의한 감소와 외향각의 유의한 증가가 관찰되었고, ES14군과 ES11군에서 비복근의 근무게와 후지 활보장, 외향각이 유의하게 유지되었음을 관찰하였다. 즉, 14일 및 11일의 사전 신경근 전기자극이 근위축 지연과 근기능 보존에 효과적임을 보여주고 있다. 이러한 결과는 근위축 예방 및 기능 유지를 위해서는 신경근 전기자극을 가능한 조기 적용해야함을 알려주고 있다.

• 대한간호학회지
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• 제26권2호
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• pp.271-280
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• 1996

The purpose of this study was to determine the effect of periodic walking during hindlimb suspension on the mass, relative weight, fiber type distribution and cross-sectional area of Type I and II fibers in the developing Type II plantaris muscle. To examine the effectiveness of periodic walking on mass and fiber size, the hindlimbs of young female Wistar rats were suspended (HS group) and half of these rats walked on a treadmill for 45 min／day(15 min every 4 hours) at 5 meters／min at a 15 degree grade(HS-W group) After seven days of hindlimb suspension, the plantaris muscle wet weight was 28.40％ significantly smaller（P＜0.005） and relative plantaris muscle weight was 26.97％ smaller compared with those of control rats（P＜0.05）. The plantaris muscle wet weight and the relative plantaris muscle weight increased by 46.60％ and 49.23％ respectively with periodic walking, moreover. the plantaris muscle wet weight and the relative plantaris muscle weight of the HS-W rats recovered to the level of the control rats. No change was observed in fiber type percentage of the developing plantaris muscle following one week of hindlimb suspension or periodic walking during hindlimb suspension. Type I and II fiber cross-sectional areas of the developing plantaris muscle were 42.51％ and 43. 68％ lower in the HS group than in the control group（p＜0.0001）, Type I and II fiber cross-sectional areas of the developing plantaris were 30.82％ and 45.97％ greater in the HS-W group than in the HS group（p＜0.0001）, whereas Type I and II fiber cross-sectional area of HS-W group were less than those of the control group（P＜0.0001） The results suggest that periodic walking can attenuate developing plantaris muscle atrophy induced by hindlimb suspension.

• 한국임상수의학회지
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• 제21권4호
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• pp.380-383
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• 2004

Two dogs with hindlimb paralysis were referred to the Teaching Animal Hospital of Chonbuk National University. We performed an acupuncture in two cases. Case No.1 was a 5-year-old, 3kg intact mixed breed female dog presented with hindlimb paralysis during last 3 days. Physical examinations, CBC, serum chemistry, urinalysis and radiography carried out. The diagnosis was the thoracolumbar disk disease of Tl2-Tl3 on the basis of above these tests. Acupoints selected were Lumbosacral point, GV-5(Xuan Shu), GV-20(Bai Hui), GB-30(Huan Tiao), GB-31(Feng Shi), ST-36(Zu San Li) and GB-34(Yang Ling Quan). we performed an acupuncture therapy five times at 2 days intervals for 15 minutes each time. Case No.2 was 7-year-old, 6.0kg, mixed breed male dog which was presented with the history of hindlimb paralysis since 2 months. The medical history of the patient revealed that the condition did not respond to medicinal therapy. The diagnosis was the thoracolumbar disk disease of Tl3-Ll and left patellar luxation (one or two grade). We decided to perform acupuncture in this case also and the Lumbosacral point, GV-5(Xuan Shu), GV­6(Ji Zhong), GV-7(Zhong She), GB-30(Huan Tiao), GB-31(Feng Shi), ST-36(Zu San Li), GB-34(Yang Ling Quan) were used. We performed acupuncture therapy at day 3, 6, 8 and 10 for 15 minutes each time. The response to an acupuncture therapy in two patients was good and the patients were almost recovered from hindlimb paralysis.

• Journal of Korean Biological Nursing Science
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• 제10권1호
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• pp.88-95
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• 2008

Purpose: The purpose of this study was to examine the effect of neuropathic pain by peripheral nerve injury on mass and Type I and II fiber cross-sectional areas on hindlimb muscles of the neuropathic pain model rat. Method: Adult male Sprague-Dawley rats (body weight 200-220 g) were assigned to one of two groups: a neuropathic pain group (n=7) that had a ligation of the left L5 spinal nerve, a control group (n=5), a naive rat without any procedures. Withdrawal threshold, activity, body weight and food intake were measured daily. At 8 days after neuropathic pain, all rats were anesthetized and the soleus and plantaris muscles were dissected from the both hindlimbs. Body weight, food intake, muscle weight and Type I and II fiber cross-sectional area of the dissected muscles were determined. Result: The neuropathic pain group showed a significant decreases (p<.05) as compared with the control rats, in diet intake, body weight, muscle weight and Type II fiber cross-sectional area of the left (affected side) soleus and plantaris muscles, and the right (unaffected side) muscle weight of plantaris and Type II fiber cross-sectional area of the soleus muscle. Conclusion: The hindlimb muscle atrophy occurs in both affected and unaffected side due to neuropathic pain by the peripheral nerve injury. The hindlimb muscle atrophy of the affected side is more pronounced than that of the unaffected side.

• 대한간호학회지
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• 제21권3호
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• pp.281-294
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• 1991

The purpose of this study was to determine the amount of soleus muscle atrophy in rats due to 28 days of decreased activity induced by hindlimb suspension, to observe the restoration of mass and relative muscle weight of the atrophied soleus muscle at day 28 of recovery to control value, and to compare the effect of run training on the mass and relative muscle weight of the atrophied soleus muscle at day 28 of recovery with that of sedentary rats. Adult female Wistar rats were maintained for 28 days with hindlimb suspension. Rats were then assigned randomly to a cage sedentary or running group. Soleus muscle mass and relative muscle weight following hindlimb suspension were compared with a control value. The soleus muscle mass and relative muscle weight of the running and cage sedentary groups following hindlimb suspension were compared with those of a control group. Soleus muscle mass and relative muscle weight of the run training group were compared with those of cage sedentary group. The results obtained were as follows : 1. Soleus muscle mass and relative muscle weight was reduced to 53.28% and 51.11% respectively by hindlimb suspension. 2. Soleus muscle mass and relative muscle weight of the training group t day 28 of recovery was restored to the control value. 3. Soleus muscle mass of the training group was greater than that of the cage sedentary group by 6.6% without statistical significance at day 28 of recovery. 4. Relative soleus muscle weight of the traning group was significantly greater than that of the cage sedentary group by 15.79% From these results, it may be concluded that run training during the posthypokinetic period facilitates the recovery of the atrophied soleus muscle mass of rats.

• 한국동물학회지
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• 제39권2호
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• pp.132-138
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• 1996

To learn how maximal locomotory speed of animals is defined in terms of hindlimb structure and muscle contractile function, take-off speed, hindlimb length, thigh muscle mass, shortening velocity and power of the sastrocnemius muscle were measured with one fast species, Rono nigromaculota and one relatively slowresponding species, Bombina orientalis. Take-off speed (m.sec-1) was greater in R. nigromoculata $(2.4\pm0.2SD, $ n: 14) than in the Bombino $(1.6\pm0.1SD, $ n=8). Stvle of the take-off response was a long-iump type in the Rano and a short-ranged hopping in the Bombing. Faster take-off capacity of the ranid frogs was supported by the longer hindlimb length (relative to body length) and the more massive thigh muscles (relative to body mass), compared to the Bombina. Further, the ranids exhibited faster maximal shortening velocity and Breater maximal power generateion than the Bombina [Vmax $(ML.sec-1)=11.79\pm1.69SD$ for the Runa and $9.74\pm1.27SD$ for the Bombina; Pmax $nW.kg-1)=222.42\pm42.42SD$ for the Rono and $169.03\pm34.52SD$ for the Bombinal. With more massive thigh muscles and greater mechanical power, the ranids would generate greater total power and thus higher energy release per unit time to muscle tissues for the burst take-off. As a consequence, biomechanical properties seen in the ranids seem to be more effective for frost take-off than in the Bombina.

• 대한통합의학회지
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• 제5권4호
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• pp.49-55
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• 2017

Purpose : In this study we tested the hypothesis that eucommia ulmoides (EU) extract would improve disuse-induced muscle atrophy following hindlimb immobilization. Method : The hindlimb immobilization was performed with casting tape to keep the left ankle joint in a fully extended position. The rats in EU treated group were orally administrated with eucommia ulmoides water extract. After 2 weeks of immobilization, all animals were sacrificed, and the whole gastrocnemius muscles were dissected from both legs. The morphology of right and left gastrocnemius muscles in both EU and control groups were assessed by hematoxylin and eosin staining. Results : Eucommia ulmoides extract represented the significant protective effects against the reductions of the gastrocnemius muscles weight and average cross section area to compared with Control group. Conclusion : Eucommia ulmoides has protective effects against immobilization induced muscle atrophy.

• 대한한방내과학회지
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• 제17권1호
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• pp.51-65
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• 1996

This experimental study was designed to investigate the effects of Cibotii Rhizoma on the muscle atrophy induced by hindlimb suspension in rats. The measurement has been performed on the activity of CK, aldolase, LDH, AST, ALT and quantity of creatine in serum of hindlimb suspension rats. The results were as ; 1. Cibotii Rhizoma significantly inhibited the increase of the activity of CK in serum. 2. Cibotii Rhizoma significantly inhibited the increase of the quantity of creatine in serum. 3. Cibotii Rhizoma significantly inhibited the increase of the activity of aldolase in serum. 4. Cibotii Rhizoma significantly inhibited the increase of the activity of LDH in serum. 5. Cibotii Rhizoma significantly inhibited the increase of the activity of AST in serum. 6. Cibotii Rhizoma significantly inhibited the increase of the activity of ALT in serum.

• 대한수의학회지
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• 제30권4호
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• pp.401-406
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• 1990

A female Holstein calf with five legs and two tails was examined macroscopically and radiographically. The external feature included two normal forelimbs, two normal hindlimbs, a normal tail and each of underdeveloped extra hindlimb and tail, which was attached to the pelvic region. The extra hindlimb consisted of an underdeveloped femur, crural meromelia, duplicated calcaneous, partially duplicated metatarsal bone, three rows of digits with hoofs. This extra hindlimb was connected to an extra os coxa. The cervical and thoracic vertebrae were fused partially. The lumbar, sacral and coccygeal vertebrae were duplicated. This calf is a dipygus associated with pygopagus parasiticus.