Lumbar Posture and Tissue Loading During Short-Term Static Posture Holding

2016 ◽  
Vol 60 (1) ◽  
pp. 948-952
Author(s):  
Faisal M Alessa ◽  
Xiaopeng Ning
Keyword(s):  
Muscle Fatigue ◽  
Task Performance ◽  
Coping Strategy ◽  
Human Body ◽  
Flexion Angle ◽  
Short Term ◽  
Lumbar Flexion ◽  
Lumbar Muscle

The purpose of the current study was to investigate the changes of lumbar biomechanics during short-term, sustained trunk bending. Eleven participants performed short-term (40 seconds) static trunk bending tasks under two trunk postures (30° or 60°) while holding a 15lbs load. Results of the current study showed significant reduction of lumbar muscle activities during the course of task performance. This change was coupled with significant increase of lumbar flexion angle and lum- bar passive moment. Results of the current study could help us better understand the coping strategy of human body in dealing with sustained spinal tissue loading as the associated lumbar muscle fatigue.

Review of Recent Developments in Surface Nanocrystallization of Metallic Biomaterials

Nanoscale ◽  
2021 ◽  
Author(s):  
Srijan Acharya ◽  
Satyam Suwas ◽  
Kaushik Chatterjee
Keyword(s):  
Human Body ◽  
Surface Characteristics ◽  
Metallic Materials ◽  
Short Term ◽  
Surface Nanocrystallization ◽  
Metallic Biomaterials ◽  
Recent Developments

Metallic materials are widely used to prepare implants for both short-term and long-term use in the human body. The performance of these implants is greatly influenced by their surface characteristics,...

Labor of Meaning, Labor of Need

2016 ◽  
Author(s):  
Mary Mostafanezhad ◽  
Krisnawati Suryanata ◽  
Saleh Azizi ◽  
Nicole Milne
Keyword(s):  
Environmental Change ◽  
Coping Strategy ◽  
Civic Participation ◽  
Short Term ◽  
Organic Farms ◽  
Cultural Logic ◽  
Organic Farm ◽  
Organic Farmers

This chapter critically examines the promise of organic farm volunteering programs such as WWOOF in meeting organic farmers’ need for affordable labor in Hawaii. While organic farm volunteering offers a short term coping strategy for some organic farmers, the cultural logic and rationale that propels these programs perpetuates the underlying labor problems that plague small organic farms. This chapter demonstrates the limitations of organic farm volunteering when utilized as a form of civic participation to drive economic and socio-environmental change.

scholarly journals The Effect of Muscle Fatigue Using Short Term Transcutaneous Electrical Nerve Stimulation

2012 ◽  
Vol 24 (5) ◽  
pp. 373-377 ◽  
Author(s):  
Ganbaatar Namuun ◽  
Yasuhiro Endo ◽  
Yota Abe ◽  
Rie Nakazawa ◽  
Masaaki Sakamoto
Keyword(s):  
Muscle Fatigue ◽  
Nerve Stimulation ◽  
Transcutaneous Electrical Nerve Stimulation ◽  
Short Term ◽  
Electrical Nerve Stimulation

scholarly journals Persistent Spatial Information in the FEF during Object-based Short-term Memory Does Not Contribute to Task Performance

2014 ◽  
Vol 26 (6) ◽  
pp. 1292-1299 ◽  
Author(s):  
Kelsey L. Clark ◽  
Behrad Noudoost ◽  
Tirin Moore
Keyword(s):  
Task Performance ◽  
Spatial Information ◽  
Short Term Memory ◽  
Spatial Working Memory ◽  
Memory Performance ◽  
Persistent Activity ◽  
Short Term ◽  
Object Based ◽  
Saccade Task

We previously reported the existence of a persistent spatial signal in the FEF during object-based STM. This persistent activity reflected the location at which the sample appeared, irrespective of the location of upcoming targets. We hypothesized that such a spatial signal could be used to maintain or enhance object-selective memory activity elsewhere in cortex, analogous to the role of a spatial signal during attention. Here, we inactivated a portion of the FEF with GABAa agonist muscimol to test whether the observed activity contributes to object memory performance. We found that, although RTs were slowed for saccades into the inactivated portion of retinotopic space, performance for samples appearing in that region was unimpaired. This contrasts with the devastating effects of the same FEF inactivation on purely spatial working memory, as assessed with the memory-guided saccade task. Thus, in a task in which a significant fraction of FEF neurons displayed persistent, sample location-based activity, disrupting this activity had no impact on task performance.

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