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Biomedical subjects

J Raimbault

Publications and source records attributed to J Raimbault.

At least 19 recordsLinked to original sources
PubMed1992

[Facial, lingual and pharyngeal electromyography in children: a method to study sucking and swallowing disorders and their pathophysiology].

The authors describe an electromyogaphic protocol developed with the aim of evaluating the sucking-swallowing function and of studying the pathophysiology of its disturbances in the newborn and in infants. This protocol consists of associating several techniques. Some of them are traditional: EMG of the facial muscles and nerves and blink reflex, while others are original: EMG of the tongue and hypoglossal nerve, EMG of the velum palatinum, and a dynamic study using a baby bottle, of the sucking and swallowing reflex for a liquid meal. For each technique, practical procedures are described together with normal results observed between birth and 3 years of age. The authors report on abnormalities observed in pathological conditions and discuss their significance in major nosological contexts. They emphasize the value of this EMG protocol in assessing the sucking-swallowing reflex, in revealing anatomo-functional disturbances in the brainstem and in tackling the pathophysiological aspects of aspiration pneumopathies, feeding difficulties and bucco-facial malformations.

Child, Preschool↗
PubMed1983

[Electromyographic study of 50 cases of Werdnig-Hoffmann disease].

An electromyographic study was performed in 50 cases of severe infantile spinal muscular atrophy (type I). 164 muscles and 93 nerves (ulnar and posterior tibialis) were tested. The thresholds of stimulation of the motor nerves were increased. Motor action potential was absent in 30% of the investigated nerves, motor nerve conduction velocity was slow in 44%, H reflex was absent in 86%. Proprioceptive nerve conduction velocity was slow in some cases. Using the long-time (50-100 msec) direct longitudinal technique of muscle stimulation (provoked fibrillation), denervation could be proved in 98% of cases. The authors emphasize diagnostical difficulties in the first days of life.

Electromyography↗
PubMed1983

[Technic and results of electromyographic exploration of the diaphragm in the infant and young child].

Electromyographic study of the diaphragma cannot be separated from the exploration of the nervi phrenici. The left nervus phrenicus is longer than the right. Both divide into 3 terminal branches that innervate the 3 main muscular areas. A different recording technique is used for each muscular area: thoracic surface electrodes for the cupulae, oesophageal probe electrodes for the crura diaphragmatis, and needle electrodes for the pars sternalis. Voluntary activity, recorded only during inspiration, is of limited use in pediatrics. The various parameters of the response to stimulation of the nervi phrenici, which are described here, are more interesting. In particular the latency period for each muscular area as a function of age is examined in detail to give an impression of the nerve conductivity.

Child↗
PubMed1982

[Electromyography in children with polymyositis (author's transl)].

Findings of repeat electromyography (EMG) in 15 children with polymyositis or dermatomyositis are reported. The data classically provided by EMG in these conditions is recalled. Emphasis is put on the contribution of stimulodetection to the diagnosis of primary disease of the muscle. With this procedure, EMG showed myogenic signs in all patients, at the first examination. Electrical anomalies are widespread from the start. A long-term study in 12 patients shows that electrical anomalies remain present long after clinical recovery. EMG disturbances are the last anomalies to disappear. EMG returns to normal when recovery is longstanding. EMG signs reappear if relapse occurs.

Adolescent↗
PubMed1976

[Maturation of somesthetic evoked potentials in man].

Somaesthetic evoked potentials (SEPs) have been recorded on the parietal scalp of 375 normal and awake children to brief electrical stimulation (0.5 msec) applied to the contralateral median nerve at the wrist. Each SEP was obtained by summation of the responses to 150 stimuli delivered at a frequency of 1/sec. The population studied has been divided in five age groups, each one corresponding to a recognizable stage of maturation of the responses.

Adolescent↗