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Principal component analysis of the features of concentric needle EMG motor unit action potentials.
Muscle Nerve. 1989 Apr; 12(4):288-93.MN

Abstract

Motor unit action potentials (MUAPs) were recorded from the biceps muscle of normal subjects and of patients with nerve or muscle diseases. Principal component analysis of the MUAP amplitude, area, area/amplitude ratio, duration, and the number of turns and phases produced three components that among them contained 90% of the variance of the data set. Thus the dimensionality of data was reduced from six to three. The first component reflected changes in the size of the MU, whereas the second reflected variations in the arrival time at the recording electrode of the action potentials of muscle fibers in the motor unit. The third factor reflected local loss of muscle fibers within the MU territory. Patterns of variations in the three components were different in patients with neuropathy and myopathy.

Authors+Show Affiliations

Division of Neurology, Duke University Medical Center, Durham, NC 27710.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

2770781

Citation

Nandedkar, S D., and D B. Sanders. "Principal Component Analysis of the Features of Concentric Needle EMG Motor Unit Action Potentials." Muscle & Nerve, vol. 12, no. 4, 1989, pp. 288-93.
Nandedkar SD, Sanders DB. Principal component analysis of the features of concentric needle EMG motor unit action potentials. Muscle Nerve. 1989;12(4):288-93.
Nandedkar, S. D., & Sanders, D. B. (1989). Principal component analysis of the features of concentric needle EMG motor unit action potentials. Muscle & Nerve, 12(4), 288-93.
Nandedkar SD, Sanders DB. Principal Component Analysis of the Features of Concentric Needle EMG Motor Unit Action Potentials. Muscle Nerve. 1989;12(4):288-93. PubMed PMID: 2770781.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Principal component analysis of the features of concentric needle EMG motor unit action potentials. AU - Nandedkar,S D, AU - Sanders,D B, PY - 1989/4/1/pubmed PY - 1989/4/1/medline PY - 1989/4/1/entrez SP - 288 EP - 93 JF - Muscle & nerve JO - Muscle Nerve VL - 12 IS - 4 N2 - Motor unit action potentials (MUAPs) were recorded from the biceps muscle of normal subjects and of patients with nerve or muscle diseases. Principal component analysis of the MUAP amplitude, area, area/amplitude ratio, duration, and the number of turns and phases produced three components that among them contained 90% of the variance of the data set. Thus the dimensionality of data was reduced from six to three. The first component reflected changes in the size of the MU, whereas the second reflected variations in the arrival time at the recording electrode of the action potentials of muscle fibers in the motor unit. The third factor reflected local loss of muscle fibers within the MU territory. Patterns of variations in the three components were different in patients with neuropathy and myopathy. SN - 0148-639X UR - https://www.unboundmedicine.com/medline/citation/2770781/Principal_component_analysis_of_the_features_of_concentric_needle_EMG_motor_unit_action_potentials_ L2 - https://doi.org/10.1002/mus.880120406 DB - PRIME DP - Unbound Medicine ER -