The mechanisms involved in the vocalization-evoked stapedius muscle contraction in the chicken (Gallus gallus) were studied. The stapedius muscle EMG response is constantly associated with vocalization elicited by electrically stimulating the mesencephalic calling area. Stimulation of discrete points within the mesencephalic calling area elicits stapedius muscle EMG activity at low stimulus intensities, but does not evoke vocalization. The stapedius muscle EMG response remains unchanged after exclusion of both the syringeal and vagal afferent inputs. It is concluded that stapedius muscle activity is not driven by a neural reflex originating within the syrinx, but is elicited by a central drive. EBS-elicited stapedius muscle activity, identical in all respects to that obtained in an intact preparation, is present when vocalization is prevented by synringeal muscle denervation and tracheal occlusion. This rules out the possibility that stapedius muscle activation could be due to vocalization-linked afferent impulses other than vagal and syringeal ones. Stimulation of discrete points within the mesencephalic calling area can elicit separately vocalization and stapedius muscle activity. This finding is discussed in terms of the existence of two midbrain neuronal populations, projecting to the XIIth nucleus (controlling the syrinx) and to the VIIth nucleus (controlling the stapedius).

Grassi, S., Magni, F., Ottaviani, F. (1988). Mechanisms controlling vocalization-evoked stapedius muscle activity in chickens (Gallus gallus). JOURNAL OF COMPARATIVE PHYSIOLOGY. A, NEUROETHOLOGY, SENSORY, NEURAL, AND BEHAVIORAL PHYSIOLOGY, 162(4), 525-532 [10.1007/BF00612517].

Mechanisms controlling vocalization-evoked stapedius muscle activity in chickens (Gallus gallus).

OTTAVIANI, FABRIZIO
1988-01-01

Abstract

The mechanisms involved in the vocalization-evoked stapedius muscle contraction in the chicken (Gallus gallus) were studied. The stapedius muscle EMG response is constantly associated with vocalization elicited by electrically stimulating the mesencephalic calling area. Stimulation of discrete points within the mesencephalic calling area elicits stapedius muscle EMG activity at low stimulus intensities, but does not evoke vocalization. The stapedius muscle EMG response remains unchanged after exclusion of both the syringeal and vagal afferent inputs. It is concluded that stapedius muscle activity is not driven by a neural reflex originating within the syrinx, but is elicited by a central drive. EBS-elicited stapedius muscle activity, identical in all respects to that obtained in an intact preparation, is present when vocalization is prevented by synringeal muscle denervation and tracheal occlusion. This rules out the possibility that stapedius muscle activation could be due to vocalization-linked afferent impulses other than vagal and syringeal ones. Stimulation of discrete points within the mesencephalic calling area can elicit separately vocalization and stapedius muscle activity. This finding is discussed in terms of the existence of two midbrain neuronal populations, projecting to the XIIth nucleus (controlling the syrinx) and to the VIIth nucleus (controlling the stapedius).
1988
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MED/31 - OTORINOLARINGOIATRIA
Settore MED/32 - AUDIOLOGIA
Settore BIO/09 - FISIOLOGIA
English
Con Impact Factor ISI
Grassi, S., Magni, F., Ottaviani, F. (1988). Mechanisms controlling vocalization-evoked stapedius muscle activity in chickens (Gallus gallus). JOURNAL OF COMPARATIVE PHYSIOLOGY. A, NEUROETHOLOGY, SENSORY, NEURAL, AND BEHAVIORAL PHYSIOLOGY, 162(4), 525-532 [10.1007/BF00612517].
Grassi, S; Magni, F; Ottaviani, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/50608
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