Emerging Technologies for Nutrition Research Potential for Assessing Military Performance Capability (1997) / Chapter Skim
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Emerging Technologies for Nutrition Research, 1997 Pp.
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the results of handgrip dynamometry are subject to patient effort and therefore may not be as sensitive and reliable as hoped. The force, relaxation, and endurance characteristics of the adductor pollicis muscle in response to ulnar nerve stimulation may be a more reliable means of measuring muscle function than the measurement of voluntary muscle function.
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Figure 23-1 Block diagram of muscle function analysis device. The force transducer provides a voltage output proportional to thumb tension.
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TEST PROCEDURE With the arm of the subject placed on the base plate, the thumb loop extending from the force transducer is placed over the thumb. The hand crank is then rotated, moving the force transducer and applying a static force to the load cell.
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Figure 23-2 Typical contraction-relaxation curvest at 10, 30, and 50 Hz. where n is 10, 30, or 50 Hz; max is the maximum frequency; Fpn is the peak force at frequency n; Fmaxp is the peak force at the maximum frequency; FBn is the baseline force at frequency n; and FmaxB is the baseline force at the maximum frequency.
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Normal Subjects The purpose of this study was to establish the contractile characteristics of skeletal muscle in normal, healthy volunteers during ulnar nerve stimulation of the adductor pollicis muscle. These results potentially would pave the way for the study of muscle function in a variety of disease states.
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TABLE 23-1 Criteria for Determining Nutritional Status Category 1: Anthropometric Criteria 1. < 90% ideal body weight.
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nutrition status. Patients are studied at baseline and at 10 days.
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References Barnard, R.J., V.R. Edgerton, and J.B.
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JOHANNA DWYER: How do you measure the total body protein? JAMES HAYES: To be perfectly honest with you, I am not sure.
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eliminate that as a possibility. In the patient populations, they are normally not really active.
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