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Literature DB >> 4647858

A method for estimating the number of motor units in thenar muscles and the changes in motor unit count with ageing.

Abstract

A method for estimating the number of motor units in median innervated thenar muscles is described. In normal human subjects under 40 years of age, the mean and 1 SD was 253+34. The number of motor units falls with increasing age, especially after mid life, so that elderly subjects often have less than one-half the number in youth despite good strength. The cause is not known but probably includes peripheral nerve trauma and `primary neuronal cell death'.

Entities: Disease Species

Mesh：

Year: 1972 PMID： 4647858 PMCID： PMC494191 DOI： 10.1136/jnnp.35.6.845

Source DB: PubMed Journal: J Neurol Neurosurg Psychiatry ISSN： 0022-3050 Impact factor: 10.154

15 in total

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Authors: E CHRISTENSEN
Journal: Am J Phys Med Date: 1959-04

2. Anomalous innervation of the hand muscles.

Authors: T ROWNTREE
Journal: J Bone Joint Surg Br Date: 1949-11

3. Age changes in cross striated muscle of the rat.

Authors: E Gutmann; V Hanzlíková; F Vysokocil
Journal: J Physiol Date: 1971-07 Impact factor: 5.182

4. Median and ulnar neuropathy in the guinea-pig.

Authors: P M Fullerton; R W Gilliatt
Journal: J Neurol Neurosurg Psychiatry Date: 1967-10 Impact factor: 10.154

5. An electrophysiological investigation of limb-girdle and facioscapulohumeral dystrophy.

Authors: R E Sica; A J McComas
Journal: J Neurol Neurosurg Psychiatry Date: 1971-08 Impact factor: 10.154

6. Motor innervation, motor unit organization and afferent innervation of m. extensor digitorum communis of the baboon's forearm.

Authors: R M Eccles; C G Phillips; W Chien-Ping
Journal: J Physiol Date: 1968-09 Impact factor: 5.182

7. Fibre size and content of the anterior tibial nerve of the foot.

Authors: M Swallow
Journal: J Neurol Neurosurg Psychiatry Date: 1966-06 Impact factor: 10.154

8. Motor unit in old age.

Authors: E Gutmann; V Hanzlíková
Journal: Nature Date: 1966-02-26 Impact factor: 49.962

9. An electrophysiological study of Duchenne dystrophy.

Authors: A J McComas; R E Sica; S Currie
Journal: J Neurol Neurosurg Psychiatry Date: 1971-08 Impact factor: 10.154

10. Electrophysiological study of dystrophia myotonica.

Authors: A J McComas; M J Campbell; R E Sica
Journal: J Neurol Neurosurg Psychiatry Date: 1971-04 Impact factor: 10.154

54 in total

1. Factors contributing to preferential motor reinnervation in the primate peripheral nervous system.

Authors: R D Madison; S J Archibald; R Lacin; C Krarup
Journal: J Neurosci Date: 1999-12-15 Impact factor: 6.167

2. Loss of synaptic vesicles from neuromuscular junctions in aged MRF4-null mice.

Authors: Qingbo Wang; Sadie L Hebert; Mark M Rich; Susan D Kraner
Journal: Neuroreport Date: 2011-03-09 Impact factor: 1.837

3. Motor unit fibre density in the extensor digitorum communis muscle. Single fibre electromyographic study in normal subjects at different ages.

Authors: E Stålberg; B Thiele
Journal: J Neurol Neurosurg Psychiatry Date: 1975-09 Impact factor: 10.154

A method for estimating the number of motor units in thenar muscles and the changes in motor unit count with ageing.

1. Topography of terminal motor innervation in striated muscles from stillborn infants.

2. Anomalous innervation of the hand muscles.

3. Age changes in cross striated muscle of the rat.

4. Median and ulnar neuropathy in the guinea-pig.

5. An electrophysiological investigation of limb-girdle and facioscapulohumeral dystrophy.

6. Motor innervation, motor unit organization and afferent innervation of m. extensor digitorum communis of the baboon's forearm.

7. Fibre size and content of the anterior tibial nerve of the foot.

8. Motor unit in old age.

9. An electrophysiological study of Duchenne dystrophy.

10. Electrophysiological study of dystrophia myotonica.

1. Factors contributing to preferential motor reinnervation in the primate peripheral nervous system.

2. Loss of synaptic vesicles from neuromuscular junctions in aged MRF4-null mice.

3. Motor unit fibre density in the extensor digitorum communis muscle. Single fibre electromyographic study in normal subjects at different ages.

Review 4. How to assess functional status: a new muscle quality index.

5. Multiple point electrical stimulation of ulnar and median nerves.

6. Changes in motor unit populations in motor neurone disease.

7. Estimation of the number of motor units based on macro-EMG.

8. Influence of age and gender on the jaw-stretch and blink reflexes.

9. Age-dependent skeletal muscle transcriptome response to bed rest-induced atrophy.

10. Evidence for reversible motoneurone dysfunction in thyrotoxicosis.