Abstract
Summary. The spike of motor unit potentials was investigated in the human brachial biceps by means of a multielectrode containing twelve small leading‐off surfaces distributed over a length of 2.5 mm (Fig. 3). Within a distance of 0.38 mm the spike amplitude decreased to one tenth of its maximum value (Figs. 6, 7). The duration of the positive‐negative deflection of the spike averaged 136 μ sec (36.5 0 C) at the lead with maximum response. increasing by 100 μsec over the distance at which amplitude had fallen to one tenth of its maximum value (Table 2). The six times longer duration of the total motor unit potential than of its spike component is due to superposition of temporally dispersed spike potentials from more distant parts of the motor unit (Table 2). Applying volume conduction analysis to the motor unit spikes classified in three groups according to maximum amplitude, the relation was determined between spike amplitude and distance from the axis of the potential source. The logarithm of spike
Keywords
Spike (software development)AmplitudeMotor unitLogarithmSpike sortingPhysicsMathematicsBiomedical engineeringAnatomyMathematical analysisOpticsMedicineComputer science
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Publication Info
- Year
- 1957
- Type
- article
- Volume
- 38
- Issue
- 3-4
- Pages
- 331-354
- Citations
- 113
- Access
- Closed
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Cite This
Fritz Buchthal,
Christian Guld,
Poul Rosenfalck
(1957).
Volume Conduction of the Spike of‘ the Motor Unit Potential Investigated with a New Type of Multielectrode.
Acta Physiologica Scandinavica
, 38
(3-4)
, 331-354.
https://doi.org/10.1111/j.1748-1716.1957.tb01396.x
Identifiers
- DOI
- 10.1111/j.1748-1716.1957.tb01396.x