Question

Asked 9th Feb, 2016

Khon Kaen University

What is the most weakness muscle in the quadriceps in aging?

If muscle decline in sarcopenia, may it have effect in VMO or VL ?

How is the balance between VMO VL in aging?

Parinyathip Thongduang

Khon Kaen University

Thanks you very musch.

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Earric M Lee

Montreal Heart Institute

Nihar Ranjan Mohanty

KIIT University

Chris Oliver

Michael C. Meyers

Idaho State University

George Zafiropoulos

University of South Wales

Earric M Lee

Montreal Heart Institute

The VI or vastus intermedius. MRI studies have shown that csa decreases from non-exercising control groups comes from that area the most. Given its deep position over the VMO and VL, muscle activation tends to be reduced in most activities of daily living. Also, the muscle is more tonic in nature. The rec fem is a biarticular muscle, therefore, it is subjected to more movement related stress from both hip flexion and knee extension.

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1 Recommendation

Earric M Lee

Montreal Heart Institute

Very subjective. The rate of decline may not be as much as in the vl, given that aging is accompanied by degenerative joints and surrounding structures. Assuming it is a sedentary but healthy population, there would be a higher degree of vmo size reduction. Although studies have shown that the decrease in force production is equal; which can be attributed back to muscle physiology and pcsa, the pennation angle of the vmo gives it more of a biomechanical advantage, although the physical size of the vl is still larger.

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1 Recommendation

Hamdy Elsaid Elnawasry

Damietta University

dear Parinyathip Thongduang

ihope the following site help you

best regards hamdy

http://onlinelibrary.wiley.com/doi/10.1016/j.orthres.2004.08.004/abstract

http://www.sciencedirect.com/science/article/pii/S026800330400186X

http://www.mdpi.com/1424-8220/8/6/3643/htm

http://journals.lww.com/nsca-jscr/Abstract/2003/08000/Neuromuscular_Differences_Between.15.aspx

http://jap.physiology.org/content/99/3/1085.abstract

http://www.sciencedirect.com/science/article/pii/S1050641113000266

http://www.ncbi.nlm.nih.gov/pubmed/18452611

http://link.springer.com/article/10.1007/s11357-013-9517-z#/page-1

http://link.springer.com/article/10.1007/s00421-011-2089-7#/page-1

http://journals.humankinetics.com/AcuCustom/Sitename/Documents/DocumentItem/6002.pdf

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2 Recommendations

Parinyathip Thongduang

Khon Kaen University

I don't know how to thank you.

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Abdel-Rahman Akl

Alexandria University

see the attached papers, maybe help you.

Best regards,

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1 Recommendation

Parinyathip Thongduang

Khon Kaen University

Thanks you very musch.

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What are the effects of latissimus dorsi muscle stretching on chronic mechanical low back pain?

Question

5 answers

Asked 26th Mar, 2016

Syed Shakil Ur Rehman

what will be the effects of latissimus muscle stretching on symptoms in patients with chronic mechanical low back pain???

need the supported evidence

because as per my clinical observation the latissimus dorsi tightness is common the chronic patients of mechanical low back pain.

thats why we want to investigate the issue by a research study.

What is the effectiveness of EMS in quadriceps denervated muscle in spinal cord injury?

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Miguel Ángel Capó Juan

I am studying the effectiveness to avoid the muscle atrophy

Ishii screening tool sarcopenia?

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1 answer

Asked 4th Oct, 2023

Bo Kerkhoff

Hello researchers,

I am a student at the SOMT, university of Physical Therapy(The Netherlands) and I am studying for a master degree in Geriatric Physical therapy.

Currently I am working on a school assignment where I want to look further in differentiating sarcopenia (screening) in a nursing home. In a lot of literature I found that the Ishii screening tool is highly

It would really help me with my assignment :)

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The effects of on stretch and off stretch SSTMs? Which may be more beneficial in terms of increasing rectus femoris length ?

Question

3 answers

Asked 31st Jul, 2014

Reda Losiute

I am looking for studies on SSTMS showing it's effects on quadriceps shortening . The SSTMS could be of any type. The effects should preferably on the length of the quadriceps muscle .Please include any experiences and / or studies .

thank you for your time

What are the list of muscle hypertrophy genes?

Question

3 answers

Asked 19th Dec, 2017

H. M. Arif Ullah

Hi everyone,

I want to learn about muscle hypertrophy, responsible for increasing muscle size. It is also related to sarcopenia or aging. So, please let me know what are the crucial factors (proteins) for muscle hypertrophy. however, we know that IGF-1 is the activator of muscle hypertrophy. What are the other genes??

How to induce diabetes type 2 in mice in order to study mitohondrial dysfunction?

Question

9 answers

Asked 12th Sep, 2016

Mohammad Mosaferi Ziaaldini

Dear experts,

which method is recommended to inducing diabetes type 2 in mice for studying mitochondrial dysfunction?

Drug (streptozotocin) or high fat diet?

and also any other useful information about the type and age of mice?

After inducing diabetes, 8 week exercise training will be conducted.

Thanks in advance.

Does the proprioceptive feedback and inter- as well as intra-muscular co-ordination ever reach the pre-injury level after ACL reconstruction?

Question

2 answers

Asked 6th Jun, 2019

Narinder Kumar

Extremely rapid response of various components of quadriceps muscle complex and hamstrings are essential for knee stability during rapid acceleration and deceleration as well as activities requiring sudden change of direction. Intra- and intermuscular co-ordination based on proprioceptive feedback from structures in and around knee (including cruciate ligaments) ensure stability of the knee joint during these activities.

ACL tears are the commonest knee injury among active adults and hamstring tendons are commonly sacrificed for ACL reconstruction.

Does the proprioceptive feedback and inter- as well as intra-muscular co-ordination ever reach the pre-injury level after ACL reconstruction, with neurogenic feedback from both ACL and hamstring tendons being not available? If yes, how long does it take? Any objective evidence available for same in form of EMG studies or any other objective criteria?

Would it be safe to allow full athletic activity before complete restoration of proprioception and muscle co-ordination (a lot of surgeons permit athletic activity at 6 months post-op)? What would be the objective criteria for allowing the same depending on proprioceptive and muscle co-ordination activity?

Why we consider the quadriceps muscle activity as negative work in spite of knee maintained in extension not flexsion during stance phase of gait?

Question

8 answers

Asked 31st Dec, 2017

Mohamed El-asuoty

human gait , motion

Understanding in length adding of sarcomeres in series, and in parallel adding of sarcomeres?

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Be the first to answer

Asked 9th Feb, 2018

Deleted profile

In length:

I assume a sarcomere gets stretched, this can be to a very long extend. This sarcomere is not functioning anymore very optimal. The muscle will, I guess form a cytoskeleton, with z-disk, and alfa-actin, and to this there will be added myosin and actin. The sarcomere can be added, I think, at the end or beginning, near the tendon. However, it can also happen inside the muscle fiber, near the middle (?) At least I reckon that there is stretch and lengthening there also.

In parallel:

I assume a sarcomere get microdamaged some myofilaments will have structural damage and this is restored and probably made stronger, so the myofilaments will enlarge in volume.

However, is this in parallel adding?

It is claimed the vastus lateralis will have a increased pennation angle, and more sarcomeres are added in parallel. However, how does this work? I assume there will be an adding of sarcomeres at some parts of the muscle fiber, so there would not be an parallel structure, as we see in books. It will be more like this : __|-|___|-|___

Is there any literature about this?

A lot of thanks.

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El envejecimiento se relaciona con cambios en la compo- sición corporal, y uno de estos cambios es la sarcopenia, definida como la pérdida de masa muscular relacionada con la edad. La etiología de este proceso actualmente aún no es bien conocida, pero se puede considerar como un síndrome multifactorial. Las repercusiones clínicas y funcionales que...

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Sarcopenia, the age-related loss of muscle mass and strength with impaired function, is progressively docu-mented as a major issue in geriatric medicine. It is remarkable that the study of this condition has recently ex-tended beyond the borders of geriatrics, highlighting the importance of muscle physiology to the overall health status. Definitely...

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