Original Article / œ·¡œ›r˜œo Œ´
Áª«µ­˜¦r¢œg ¢¼­µ¦ 2551; 18(3): 105-108
J Thai Rehabil Med 2008; 18(3): 105-108
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„¨n¤» ŠµœÁª«µ­˜¦r¢œg ¢¼ 抡¥µµ¨Á¨·—­·œ „¦¤„µ¦Â¡š¥r „¦³š¦ªŠ­µ›µ¦–­»…
ABSTRACT
Characteristics of motor unit action
potentials (MUAPs) by monopolar
needles
Chokpraisin R.
Rehabilitation Medicine Division,
Lerdsin General Hospital, Department
of Health Service, Ministry of Public
Health
Objectives: To determine the electromyographic characteristics of MUAPs
by monopolar needles and to compare
them with normal data from foreign
studies.
Subjects: Forty-four healthy volunteers,
22 males and 22 females with mean
age of 39 years, working at Lerdsin
General Hospital
Methods: By using the monopolar
needles, amplitudes, durations and
phases of MUAPs of abductor digiti
minimi (ADM), deltoid, biceps brachii,
extensor digitorum communis (EDC)
and tibialis anterior (TA) muscles on
the right side were collected and
compared with normal data from other
studies.
Results: Most of the subjects were
non-regular exercisers and righthanded. When compared with the
foreign data, the amplitudes of MUAPs
in our subjects were significantly 2-3
times less in all muscles except of
Correspondence to: Dr. Rungtip
Chokpraisin, Rehabilitation Medicine
Division, Lerdsin General Hospital, Silom
road, Bangrak, Bangkok, 10500.
E–mail : [email protected]
biceps brachii muscles. Regarding
durations and phases, results were
nearly the same.
Conclusion: The characteristics of
MUAPs by monopolar needles in
healthy Thai population were the
same as those reported in foreign
studies except amplitudes which were
2-3 times smaller in all muscles.
Keywords: electromyography, motor
unit action potentials, monopolar
needles, normal data
J Thai Rehabil Med 2008; 18(3): 105-108
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brachii, extensor digitorum communis
¨³ tibialis anterior ×¥ª´—°¤¡¨·‹—¼
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digiti minimi (ADM), deltoid, biceps
brachii, extensor digitorum communis (EDC) ¨³„¨oµ¤Áœº°Ê tibialis
anterior (TA) ¦·Áª–—oµœ…ªµ…°Š
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Á„¦ÈŠÁµ Ç —´ŠÂ­—ŠÄœ˜µ¦µŠš¸É 1-5
¦¼žš¸É 1 ­—Š Motor unit action potential (MUAP)
¦¼ž£µ¡—´—ž¨Š¤µ‹µ„®œ´Š­º° Electrodiagnosis Medicine …°Š Dumitru(6)
- 106 -
„µ¦«¹„¬µœ¸Ê
Nelson(9)
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11.07±2.43
3.46±0.79
1.76±0.90
7.80±0.24
3.11±0.09
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polyphasic
potentials
8.06
Ťn¤¸…o°¤¼¨
˜µ¦µŠš¸É 1 ­—Š¡µ¦µ¤·Á˜°¦r…°Š®œnª¥‡¨ºœÉ Å¢¢jµ‹µ„„¨oµ¤Áœº°Ê abductor digiti minimi (ADM)
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Nelson(9)
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1.5±0.6
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13.81±4.07
12.7±1.9
6.2±2.2
‹Îµœªœ
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3.35±0.90
3.4 ±1.4
2.9±0.8
¦o°¥¨³
polyphasic
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7.40
19.0
Ťn¤¸…o°¤¼¨
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Chu-Andrews(3)
Howard(10)
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‹Îµœªœ
Á¢­
3.60±0.91
3.3 ±1.0
Ťn¤¸…o°¤¼¨
¦o°¥¨³
polyphasic
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8.30
14.2
Ťn¤¸…o°¤¼¨
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„µ¦«¹„¬µœ¸Ê
Chu-Andrews(3)
Pease (11)
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Ťn¤¸…o°¤¼¨
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9.20
19.2
Ťn¤¸…o°¤¼¨
˜µ¦µŠš¸É 4 ­—Š¡µ¦µ¤·Á˜°¦r…°Š®œnª¥‡¨ºœÉ Å¢¢jµ‹µ„„¨oµ¤Áœº°Ê extensor digitorum communis
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Howard (10)
Chan(12)
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1.2±0.7
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14.01±3.44
16.2±5.2
11.2±1.7
14.7±4.02
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3.65±1.15
3.6±1.1
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˜µ¦µŠš¸É 5 ­—Š¡µ¦µ¤·Á˜°¦r…°Š®œnª¥‡¨ºœÉ Å¢¢jµ‹µ„„¨oµ¤Áœº°Ê tibialis anterior
- 107 -
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polyphasic
potentials
10.20
18.6
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1. Á¢g°~ Š¢jµ ‡»–µ—¦. „µ¦˜¦ª‹Å¢¢jµª·œ‹· Œ´¥.
Ĝ: Á­„ °´„¬¦µœ»Á‡¦µ³®r. ˜¶¦µÁª«µ­˜¦r¢gœ ¢¼. „¦»ŠÁš¡²: 抡·¤¡rÁš‡œ·‡ 19; 2539:
®œoµ 57-73
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