Effects of 90min of manual repetitive work on skin temperature and median and ulnar nerve conduction parameters: A pilot study in normal subjects

The physiological subscale of the Revised Children's Manifest Anxiety Scale was examined using a matched single-subject research design. As predicted, a high scorer on the physiological subscale had a significantly higher resting EMG and did not significantly recover as did the low scorer on the physiological subscale on EMG. Contradictory findings were observed on skin temperature measures. Findings are discussed relative to the scope and shortcomings of the investigation, and directions for research are suggested.

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A pilot study investigating the use of 4D flow MRI for the assessment of splanchnic flow in patients suspected of mesenteric ischaemia

Scientific Reports ◽

10.1038/s41598-021-85315-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Pauline Hall Barrientos ◽

Katrina Knight ◽

Douglas Black ◽

Alexander Vesey ◽

Giles Roditi

Keyword(s):

Blood Flow ◽

Pilot Study ◽

Splenic Vein ◽

Normal Subjects ◽

Mesenteric Ischaemia ◽

4D Flow Mri ◽

4D Flow ◽

Flow Mri ◽

Mesenteric Vessels ◽

Flow Changes

AbstractThe most common cause of chronic mesenteric ischaemia is atherosclerosis which results in limitation of blood flow to the gastrointestinal tract. This pilot study aimed to evaluate 4D flow MRI as a potential tool for the analysis of blood flow changes post-prandial within the mesenteric vessels. The mesenteric vessels of twelve people were scanned; patients and healthy volunteers. A baseline MRI scan was performed after 6 h of fasting followed by a post-meal scan. Two 4D flow datasets were acquired, over the superior mesenteric artery (SMA) and the main portal venous vessels. Standard 2D time-resolved PC-MRI slices were also obtained across the aorta above the coeliac trunk, superior mesenteric vein, splenic vein and portal vein (PV). In the volunteer cohort there was a marked increase in blood flow post-meal within the PV (p = 0.028), not seen in the patient cohort (p = 0.116). Similarly, there were significant flow changes within the SMA of volunteers (p = 0.028) but not for the patient group (p = 0.116). Our pilot data has shown that there is a significant haemodynamic response to meal challenge in the PV and SMA in normal subjects compared to clinically apparent CMI patients. Therefore, the interrogation of mesenteric venous vessels exclusively is a feasible method to measure post-prandial flow changes in CMI patients.

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The influence of skin temperature on latency and amplitude of the sympathetic skin response in normal subjects

Muscle & Nerve ◽

10.1002/(sici)1097-4598(199801)21:1<34::aid-mus5>3.0.co;2-h ◽

1998 ◽

Vol 21 (1) ◽

pp. 34-39 ◽

Cited By ~ 22

Author(s):

Thierry Deltombe ◽

Philippe Hanson ◽

Jacques Jamart ◽

Michel Cl�rin

Keyword(s):

Skin Temperature ◽

Sympathetic Skin Response ◽

Normal Subjects ◽

Skin Response

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Index finger position and force of the human first dorsal interosseus and its ulnar nerve antagonist

Journal of Applied Physiology ◽

10.1152/jappl.1994.77.2.987 ◽

1994 ◽

Vol 77 (2) ◽

pp. 987-997 ◽

Cited By ~ 26

Author(s):

I. Zijdewind ◽

D. Kernell

Keyword(s):

Ulnar Nerve ◽

Index Finger ◽

Maximum Voluntary Contraction ◽

Normal Subjects ◽

Voluntary Contraction ◽

Abduction Angle ◽

Hand Position ◽

First Dorsal Interosseus ◽

Length Analysis ◽

Neutral Angle

In normal subjects, maximum voluntary contraction (MVC) and electrical ulnar nerve stimulation (UNS; 30-Hz bursts of 0.33 s) were systematically compared with regard to the forces generated in different directions (abduction/adduction and flexion) and at different degrees of index finger abduction. With a “resting” hand position in which there was no index finger abduction, UNS produced about one-half of the abduction force elicited by an MVC (mean ratio 51%). Qualitatively, such a discrepancy would be expected, because UNS activates two index finger muscles with opposing actions in the abduction/adduction plane of torques: the first dorsal interosseus (FDI) and the first palmar interosseus (FPI). The abduction forces produced by MVC and UNS were very sensitive to index finger abduction angle: at a maximum degree of abduction, the UNS-generated force even reversed its direction of action to adduction (with FPI dominating) and the abduction MVC declined to 37% of that in the resting hand position. Inasmuch as these declines in MVC- and UNS-generated abduction force could not be explained by a change in moment arm, the main alternative seemed to be abduction-associated alterations in FDI fiber length (analysis by previously published biomechanical data). The FDI and FPI were further compared by application of a UNS-generated fatigue test (5-min burst stimulation), with the index finger kept at a "neutral" angle, i.e., the abduction angle at which, in the unfatigued state, the forces of the FDI and FPI were in balance (zero net UNS-generated abduction/adduction force).(ABSTRACT TRUNCATED AT 250 WORDS)

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