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At least 181 records · Page 10Linked to original sources
PubMed1987

[Effect of adequate stimulation of the vestibular apparatus on the locomotor activity of the forelimb muscles in the guinea pig. Rotations relative to the longitudinal axis].

Influence of the adequate vestibular stimulation by tilting about the longitudinal axis on the locomotor activity of forelimb muscles was investigated in precollicularly decerebrated guinea pigs. The locomotor activity was evoked by electrical stimulation of the mesencephalic locomotor region. An increase of the extensor activity in the stance phase and a decrease of the flexor activity in the swing phase on the limb ipsilateral to the tilt and opposite changes of the antagonist muscles activity on the limb contralateral to the tilt were observed during animal movements. It is found that during the sinusoidal tilting in the frequency range of 0.02-0.4 Hz changes in the locomotor activity lead the animal displacement: 60-40--in extensors, 40-20 degrees--in flexors. Mechanisms of the vestibular control of the locomotor activity are discussed.

Animals↗
PubMed1987

[Effect of adequate stimulation of the vestibular apparatus on the locomotor activity of the hindlimb muscles in the guinea pig. Rotations relative to the longitudinal axis].

Influence of the adequate vestibular stimulation by tilting about the longitudinal axis on the locomotor activity in hindlimb muscles evoked by electrical stimulation of the mesencephalic locomotor region was investigated in precollicularly decerebrated guinea pig. Rhythmic activity in extensors occurred during the horizontal position and ipsilateral tilt of the animal. Contralateral tilt was followed by a decrease in the extensor activity. Flexors revealed two periods of enhanced rhythmic activity; one during the ipsilateral tilt and another during the contralateral tilt. Mechanisms of the observed changes of the locomotor activity are discussed.

Animals↗
PubMedDate not supplied

[Effect of caloric stimulation of the vestibular apparatus on hearing function].

Changes of bone-conduction thresholds for tonal signals (250 and 2000 Hz) in each car due to caloric vestibular tests were studied in 60 healthy test subjects (32 men and 28 women). These changes were found in 48 subjects. In most cases perceptual thresholds decreased (by 7.3 dB on the average) and in few cases increased (by 8.3 dB on the average). The sign of alteration was independent of the tonal vestibular test or the number of examinations. The threshold returned to the norm for a long time (30 min or more). These findings suggest that the interaction may be governed by the principles that function in other sensory systems. It is recommended to carry out audiological examinations prior to vestibular tests in order to avoid distortions of the results.

Adolescent↗