Contrôle de la respiration dans la parole

Marchal, Alain

doi:10.1159/000265878

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…Although integrated activity of the diaphragma and expiratory muscles can effectively control subglottic pressure, and thus sound pressure level, few studies link activity of the diaphragma to vocalization. The results reported for humans by Marchal (1988) are ambiguous in comparison with our data. He recorded peaks of activity between pronounced syllables, indicative of inspiratory activity.…”

Section: Muscle Activity In Relation To Vocalizationcontrasting

confidence: 99%

“…In Pteronotus parnellii, the one-toone relationship between vocalizations and activity in muscles of the lateral abdominal wall in more than 2000 repetitions suggests a plausible source for the force needed to generate subglottic pressure. Similar patterns of muscle activity have been recorded from expiratory muscles in singing canaries (Hartley, 1990), vocalizing squirrel monkeys (Jürgens and Schriever, 1991) and vocalizing humans (Marchal, 1988). In the short syllables of canary songs that are comparable in length to echolocative vocalizations produced by P. parnellii, myopotentials commence prior to syllable onset and terminate before syllable offset (Hartley, 1990).…”

Section: Muscle Activity In Relation To Vocalizationsupporting

confidence: 55%

“…activity of respiratory muscles (Marchal, 1988;Hartley, 1990;Jürgens and Schriever, 1991). Vocalization, therefore, can have an intrinsic relationship to locomotion.…”

Section: Respiratory Muscle Activity In Relation To Vocalization In Flying Batsmentioning

confidence: 99%

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Respiratory Muscle Activity in Relation to Vocalization in Flying Bats

Lancaster

Henson

Keating

1995

Journal of Experimental Biology

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The structure of the thoracic and abdominal walls of Pteronotus parnellii (Microchiroptera: Mormoopidae) was described with respect to their function in respiration and vocalization. We monitored electromyographic activity of respiratory and flight muscles in relation to echolocative vocalization. In flight, signals were telemetered with a small FM transmitter modified to summate the low-frequency myopotentials with biosonar signals from a ceramic-crystal microphone. Recordings were also made from the same bats confined to a small cage. Vocalizations were used as the parameter by which all muscle activities were correlated. A discrete burst of activity in the lateral abdominal wall muscles accompanied each vocalization. Diaphragmatic myopotentials occurred between groups of calls and did not coincide with activity of the abdominal wall or with vocalizations. Flight muscles were not active in resting bats. During flight, vocalizations and the abdominal muscle activity that accompanied them coincided with myopotentials of the pectoralis and serratus ventralis muscles. We propose that contractions of the lateral abdominal wall provide the primary power for the production of intense biosonar vocalization in flying and in stationary bats. In flight, synchronization of vocalization with activity of the pectoralis and serratus ventralis jointly contribute to the pressurization of the thoraco-abdominal cavity. This utilization of pressure that is normally generated in flight facilitates respiration and allows for the production of intense vocalizations with little additional energetic expenditure.

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Section: Muscle Activity In Relation To Vocalizationcontrasting

confidence: 99%